# Strategy Specifications
## Deck Name And Archetype
Nykthos Ramp is a Pioneer green big-mana devotion deck registered as 60 main-deck cards and 15 sideboard cards, with supplied format-aware validation passing under the active Pioneer contract. Treat this guide as built for the exact registered list: 12 Forest, 2 Nykthos, Shrine to Nyx, 2 Castle Garenbrig, 3 Lair of the Hydra, 2 Boseiju, Who Endures, 2 Llanowar Elves, 2 Elvish Mystic, 2 Old-Growth Troll, 2 Polukranos Reborn, 4 Voracious Hydra, 4 Badgermole Cub, 2 Cavalier of Thorns, 2 Scavenging Ooze, 2 Kiora, Behemoth Beckoner, 4 Scrapshooter, 4 Spider Manifestation, 4 Meltstrider's Resolve, 3 Ba Sing Se, 1 Cityscape Leveler, and 1 Ugin, the Spirit Dragon.

The strategic identity is hybrid stock-and-rogue green devotion: the shell uses familiar Pioneer devotion pressure from Nykthos, Shrine to Nyx, Castle Garenbrig, mana creatures, Old-Growth Troll, Cavalier of Thorns, Voracious Hydra, and planeswalker/top-end payoffs, but the registered build includes unusual or newer cards that require engine-confirmed text before relying on known heuristics. Card text check required for Badgermole Cub, Scrapshooter, Spider Manifestation, Meltstrider's Resolve, and Ba Sing Se before assigning precise tactical roles beyond visible legal actions and engine-provided card text.

The active archetype tags are ramp, combo, big-mana, and devotion, and the pilot should interpret “combo” as a mana-engine commitment rather than a deterministic hidden-card combo unless runtime state proves otherwise. The main plan is to convert early green permanents into large Nykthos, Shrine to Nyx turns, then deploy oversized threats, scalable X-spells, planeswalker pressure, creature-land damage, or artifact top-end without pretending the deck can execute lines not offered by the rules engine.

The role concern is that this deck must decide when it is a fast mana deck, a board-control ramp deck, or a resilient threat deck based on visible pressure and known opposing interaction. Against fast battlefield decks, stabilize first with Voracious Hydra, Polukranos Reborn, Scavenging Ooze, Scrapshooter if its engine text supports interaction, and large blockers before spending a turn on low-impact setup. Against slower decks, prioritize mana development, devotion density, and high-impact threats, while respecting visible open interaction and public information before committing Cityscape Leveler or Ugin, the Spirit Dragon.

The mana concern is that the list has only green-producing basics plus utility lands, so most decisions revolve around sequencing untapped green, preserving Nykthos, Shrine to Nyx value, and using Castle Garenbrig or Lair of the Hydra at the correct commitment point. Do not assume Boseiju, Who Endures is only a land or only interaction; choose its mode only from legal action text and visible targets.

The opponent information status is unspecified, so matchup decisions must begin from public archetype cues, revealed cards, visible lands, graveyards, exile, battlefield, stack, and Veles-provided match labels when available. Do not infer hidden removal, sweepers, graveyard hate, countermagic, combo pieces, or sideboard cards as certainty; use archetype-level risk only as a reason to prefer safer legal lines when the visible game state leaves multiple plausible actions.

## Thesis
Nykthos Ramp assembles early green mana, permanent-based devotion, and scalable top-end so a normal board of Forest plus Llanowar Elves or Elvish Mystic can become a decisive Nykthos, Shrine to Nyx or Castle Garenbrig turn. Prioritize keeping mana on the battlefield, increasing green devotion with Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Badgermole Cub, Scrapshooter, and other engine-confirmed permanents, then convert the mana spike into Voracious Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, Lair of the Hydra, or repeated pressure.

Nykthos Ramp wins by turning mana advantage into board states that are too large to trade with efficiently. The clean wins are oversized Voracious Hydra, large Lair of the Hydra attacks, Cityscape Leveler pressure, Ugin, the Spirit Dragon stabilization into inevitability, and creature combat backed by devotion permanents that survive as meaningful bodies. Kiora, Behemoth Beckoner is a bridge card when it untaps Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, or a large creature and turns four-power creatures into cards, but do not expose it for a small gain when the board needs stabilization first.

Nykthos Ramp is not trying to play a low-resource attrition game, hold up interaction every turn, or win by guessing hidden opposing cards. Use legal actions and visible pressure to decide whether to race, stabilize, or commit top-end; when uncertain, favor the line that keeps mana, devotion, and battlefield presence intact. Do not treat Boseiju, Who Endures, Scavenging Ooze, Scrapshooter, Meltstrider's Resolve, Spider Manifestation, Badgermole Cub, or Ba Sing Se as having tactical text beyond the rules engine output unless their exact text is available in the decision frame. Card text check required for Badgermole Cub, Scrapshooter, Spider Manifestation, Meltstrider's Resolve, and Ba Sing Se.

## Role Package
- Threats: Old-Growth Troll, Polukranos Reborn, Voracious Hydra, Badgermole Cub, Cavalier of Thorns, Scrapshooter, Cityscape Leveler, Ugin, the Spirit Dragon, and Lair of the Hydra are the main battlefield closers. Prefer threats that also add devotion, stabilize combat, or replace resources before committing one-shot pressure.

- Payoffs: Nykthos, Shrine to Nyx, Castle Garenbrig, Voracious Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, and Lair of the Hydra convert stored board presence into decisive turns. Treat large X values and animated Lair of the Hydra attacks as payoff commitments that must account for visible blockers, open mana, known removal, and whether waiting adds more devotion.

- Engines: Llanowar Elves, Elvish Mystic, Old-Growth Troll, Cavalier of Thorns, Kiora, Behemoth Beckoner, Nykthos, Shrine to Nyx, Castle Garenbrig, and Ba Sing Se form the ramp and devotion engine. Use Kiora, Behemoth Beckoner to amplify already-good mana or card-draw turns, not as a substitute for developing enough permanents to make Nykthos, Shrine to Nyx matter. Card text check required for Ba Sing Se.

- Velocity: Cavalier of Thorns, Kiora, Behemoth Beckoner, Spider Manifestation, Meltstrider's Resolve, and any engine-confirmed Badgermole Cub or Scrapshooter text are the likely smoothing or card-flow package. Use these cards to find lands, maintain threat density, or rebuild after removal only when the legal action text confirms the relevant effect. Card text check required for Spider Manifestation and Meltstrider's Resolve.

- Interaction: Voracious Hydra, Boseiju, Who Endures, Scavenging Ooze, Ugin, the Spirit Dragon, Cityscape Leveler, Scrapshooter, and sideboard Sorcerous Spyglass, The Stone Brain, Soul-Guide Lantern, and Damping Sphere provide the interactive module. Spend interaction on visible permanents, graveyards, activated abilities, or named-card engines that actually matter to the current clock; do not fire it merely because a legal target exists.

- Protection: The main deck protects itself mostly by redundancy, battlefield size, mana density, and forcing the opponent to answer multiple large permanents. Shifting Ceratops is the sideboard protection-pressure card when its legal text matters against interaction-heavy decks; do not assume it answers every control line without checking visible rules text and legal actions.

- Recursion: Old-Growth Troll, Cavalier of Thorns, Cityscape Leveler, Scavenging Ooze, Spider Manifestation, and Soul-Guide Lantern interact with graveyards or post-removal resources in different ways, but several require text confirmation or legal-action confirmation before relying on them. Use graveyard resources deliberately: exile opposing cards with Scavenging Ooze or Soul-Guide Lantern when the visible graveyard matters, and preserve your own graveyard if Spider Manifestation or Cityscape Leveler has a legal graveyard-relevant line.

- Mana: Forest, Llanowar Elves, Elvish Mystic, Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Boseiju, Who Endures, Old-Growth Troll, Cavalier of Thorns, and Ba Sing Se define the resource base. Prioritize untapped green early, protect devotion before activating Nykthos, Shrine to Nyx, and remember that Boseiju, Who Endures and Lair of the Hydra are both lands with non-mana tactical modes.

- Sideboard modules: Shifting Ceratops adds pressure and protection, Sorcerous Spyglass attacks visible activated-ability plans, The Stone Brain attacks named-card dependency, Soul-Guide Lantern and the extra Scavenging Ooze attack graveyards, and Damping Sphere attacks spell-chain or big-mana structures. Sideboard cards should enter only for a matchup role they can actually perform from visible and expected public context, not because they are generically powerful.

## Primary Win Conditions
- Big-mana payoff turn: Build Forest plus Llanowar Elves or Elvish Mystic into multiple green permanents, then use Nykthos, Shrine to Nyx or Castle Garenbrig to cast a payoff ahead of curve. Execute by converting the mana spike into Voracious Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, or a large Lair of the Hydra attack; prioritize this line when the visible board shows enough devotion, the opponent is not presenting immediate lethal, and waiting mostly risks losing mana creatures or devotion.

- Voracious Hydra dominance: Use Voracious Hydra as the cleanest scalable bridge from ramp to win condition because it can become a very large creature and may interact with a visible creature if the rules engine offers that legal mode. Set up by preserving green mana, counting Nykthos, Shrine to Nyx output after devotion permanents, and choosing an X size that either stabilizes combat or creates a two-turn clock. Prioritize the fight or damage-like option only when the legal action text confirms the mode and the target matters more than maximizing body size.

- Devotion combat flood: Use Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, Cavalier of Thorns, and Scavenging Ooze as pressure that also keeps Nykthos, Shrine to Nyx live. Execute by committing enough bodies to make blocking poor, then use Kiora, Behemoth Beckoner to untap the highest-impact mana source or large creature and to turn four-power creatures into cards when the engine confirms the draw trigger. Prioritize this line against opponents spending one-for-one answers, because each surviving permanent increases both damage and future mana.

- Planeswalker or artifact inevitability: Use Ugin, the Spirit Dragon and Cityscape Leveler when the opponent's visible battlefield makes ordinary attacking unreliable or when a single resolved top-end threat can reset the game. Set up by keeping land drops and mana creatures alive, then cast the top-end only when it changes the board immediately or the opponent's clock forces commitment. Disruption risk is highest when tapping out into visible pressure or known open interaction, so prefer a payoff that answers a permanent or stabilizes the board over a payoff that merely threatens future value.

## Secondary Win Conditions
- Lair of the Hydra pressure: Treat Lair of the Hydra as a mana sink and endgame threat, not an early land to expose carelessly if other green sources are available. Use it to punish stalled boards, planeswalker shields, or opponents who leave few blockers, and size it so the remaining mana still supports any legal Scavenging Ooze activation, Boseiju, Who Endures channel action, or post-combat priority action that the engine offers. Do not animate into obvious visible removal or lethal crack-back unless the attack ends the game or prevents a worse outcome.

- Kiora, Behemoth Beckoner tempo turns: Use Kiora, Behemoth Beckoner as a secondary engine when untapping Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, or a large creature creates an immediate payoff. Prioritize Kiora when it adds mana and cards in the same turn, especially with Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Voracious Hydra, Cityscape Leveler, or other confirmed four-power bodies. Do not spend a turn on Kiora if the visible board requires a blocker, removal, or lifegain action first.

- Graveyard and resource fallback: Use Scavenging Ooze to convert graveyards into life and size when the legal action text confirms exiling a relevant card, especially against visible graveyard pressure or when life total is under stress. Use Cavalier of Thorns and Old-Growth Troll as post-removal resource bodies when their legal actions or known battlefield text create land access, recursion, or sticky devotion. Card text check required for Spider Manifestation and Meltstrider's Resolve; use them as secondary win or rebuild tools only when the current rules-engine prompt reveals their actual draw, token, recursion, or pressure mode.

- Utility-interaction wins: Use Boseiju, Who Endures, Scrapshooter, and Ugin, the Spirit Dragon to remove visible permanents that block the main mana-to-pressure plan. Card text check required for Scrapshooter; if the legal action shows artifact, enchantment, flying, reach, token, or combat-relevant text, choose the mode that improves the immediate race or protects devotion. These cards win indirectly by clearing the path for oversized creatures rather than by being held forever for theoretical targets.

## Emergency Lines
- When behind on life: Stabilize before maximizing mana by casting or activating Voracious Hydra, Scavenging Ooze, Polukranos Reborn, Old-Growth Troll, or Cavalier of Thorns as bodies that change combat. Use Scavenging Ooze lifegain only from visible graveyards and only when it does not consume mana needed for a stronger legal stabilizing action. Do not activate Lair of the Hydra for pressure if doing so leaves no blockers against a visible lethal attack.

- When behind on board: Prioritize Ugin, the Spirit Dragon, Cityscape Leveler, a target-confirmed Voracious Hydra interaction mode, or a large blocker over speculative engine development. Kiora, Behemoth Beckoner is acceptable only if untapping a source immediately produces the stabilizer; otherwise, add material to the battlefield first. Preserve Nykthos, Shrine to Nyx devotion where possible, but trade creatures when trading prevents lethal or buys the turn needed for a payoff.

- When behind on cards: Use Cavalier of Thorns, Kiora, Behemoth Beckoner, and any rules-confirmed Spider Manifestation or Meltstrider's Resolve action to recover resources instead of overcommitting the last threat into a board where it does not affect combat. Card text check required for Ba Sing Se; if it offers legal selection, mana, or board development, choose the line that restores land drops or threat density without leaking tempo.

- When behind on mana or engine pieces: Keep hands and lines that still cast spells from Forest and mana creatures, because Castle Garenbrig and normal land drops can carry midrange games without Nykthos, Shrine to Nyx. If Nykthos, Shrine to Nyx is removed or absent, shift from explosive X-spell planning to curve-based pressure with Old-Growth Troll, Polukranos Reborn, Scrapshooter, Cavalier of Thorns, and eventually Lair of the Hydra.

- When graveyards, combo, or removed win conditions matter: Use Boseiju, Who Endures, Scavenging Ooze, Ugin, the Spirit Dragon, and Cityscape Leveler only against visible, legal targets or public information that the engine exposes. If Cityscape Leveler or Ugin, the Spirit Dragon is gone, win through repeated Voracious Hydra sizing, Lair of the Hydra attacks, and devotion creature combat. If Spider Manifestation or Meltstrider's Resolve appears to be graveyard-dependent, protect your own graveyard unless the engine shows that exiling cards is more urgent for survival.

## Resource Model
- Mana is the primary resource, and this deck converts early creatures, devotion permanents, Nykthos, Shrine to Nyx, Castle Garenbrig, and untap effects into oversized legal actions. Spend early turns increasing future mana before trading resources unless the visible board already threatens a race you cannot win.

- Board presence is both pressure and fuel, so preserve green permanents when they keep Nykthos, Shrine to Nyx or Kiora, Behemoth Beckoner live. Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, Cavalier of Thorns, Scavenging Ooze, and Voracious Hydra should be valued as devotion, blockers, attackers, and payoff enablers, not only as isolated bodies.

- Life total is a buffer for setup, but stop spending it implicitly once the opponent presents a short visible clock. Use large blockers, Scavenging Ooze lifegain from visible graveyards, target-confirmed Voracious Hydra interaction, Ugin, the Spirit Dragon, or Cityscape Leveler to stabilize before maximizing engine output.

- Hand size is less important than converting each card into mana, board, or a decisive payoff. Keep hands that can cast spells on time; do not hoard expensive cards if the legal action list offers a strong curve play that adds devotion or prevents damage.

- Lands are engine pieces, so sequence them by current and future action needs rather than by raw count. Forest enables early Elvish Mystic and Llanowar Elves; Nykthos, Shrine to Nyx becomes strong after devotion; Castle Garenbrig supports large creature turns; Lair of the Hydra is both land and late threat; Boseiju, Who Endures is interaction when the engine exposes a legal channel action.

- Graveyard access is conditional and must follow visible information. Use Scavenging Ooze against public graveyards when life, size, or denying a visible resource matters; Card text check required for Spider Manifestation and Meltstrider's Resolve, so protect or spend graveyard resources only after the rules engine reveals how those cards use them.

- Exile is usually a cost or consequence, not a main engine, unless the legal action text for Scavenging Ooze, Soul-Guide Lantern, or another visible effect confirms an exile choice. Do not exile your own relevant graveyard cards speculatively if Spider Manifestation or Meltstrider's Resolve may depend on them.

- Sacrifice fodder is not a default plan in this list, so treat creatures as devotion and combat resources unless a legal action explicitly asks for a sacrifice. If a sacrifice prompt appears, prefer the least strategically important visible permanent only after checking lethal defense, devotion, and future mana.

- Tempo comes from landing acceleration before the opponent can punish it, then turning excess mana into immediate board impact. Kiora, Behemoth Beckoner is strongest when it untaps a mana source or threat in the same turn; Lair of the Hydra attacks are tempo-positive only when they do not expose you to lethal crack-back.

- Information is limited to public zones, revealed cards, legal actions, and logged decision history. Do not infer exact hidden cards; instead, use visible mana, graveyard contents, battlefield pressure, known revealed cards, and opponent sideboard posture to decide whether to commit Ugin, the Spirit Dragon, Cityscape Leveler, or a large Voracious Hydra.

- Sideboard bullets are narrow resources that should answer visible matchup pressure. Shifting Ceratops is an anti-interaction threat, Sorcerous Spyglass and The Stone Brain convert information into disruption, Soul-Guide Lantern and the extra Scavenging Ooze fight graveyards, and Damping Sphere attacks spell-chain or big-mana plans.

## Mana Guide
- Green mana is the critical color, so opening hands need a reliable path to green on turn one or turn two. Prefer Forest starts for Elvish Mystic and Llanowar Elves; keep utility-heavy hands only when they still cast early green spells and have a realistic land sequence.

- One-mana accelerants are strongest when cast immediately, so use turn-one Forest into Elvish Mystic or Llanowar Elves when legal unless a forced defensive action is visible. Do not keep a hand that only becomes functional after drawing a green source unless the mulligan context is already severe and the hand has multiple live draws.

- Nykthos, Shrine to Nyx should usually be played after enough green devotion exists or when no colored spell is blocked by playing it. If the hand needs consecutive green sources, delay Nykthos, Shrine to Nyx until Forest or a mana creature covers the colored requirements.

- Castle Garenbrig is a payoff land, not a substitute for early green consistency. Sequence it when it does not delay Elvish Mystic, Llanowar Elves, Badgermole Cub, Scrapshooter, Kiora, Behemoth Beckoner, or other early green plays, then use it to power creature payoffs when the legal action list allows.

- Lair of the Hydra should enter sequencing as a green source and late mana sink, but avoid spending the turn animating it when developing devotion or casting a stabilizer is stronger. When attacking with Lair of the Hydra, choose a size that preserves required post-combat mana if legal actions show Scavenging Ooze, Boseiju, Who Endures, or interaction windows.

- Boseiju, Who Endures should be played as a land when mana development is under pressure and held as interaction when the battlefield shows a high-impact legal target. Do not strand early spells by holding Boseiju, Who Endures for a theoretical target if the current hand needs the land drop.

- Kiora, Behemoth Beckoner creates mana by untapping the best legal source or creature, so plan the turn before choosing the first tap. Tap Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, or a large mana source before untapping it only when the engine confirms the sequence is legal.

- Voracious Hydra and Lair of the Hydra scale with spare mana, so decide whether the turn needs maximum size, interaction mode, or preserved mana before committing. A smaller legal Hydra that removes a creature or leaves defense can be better than the largest possible body.

- Play lands before draw or selection when the current turn requires guaranteed mana for known legal actions. Delay the land drop when a visible effect from Cavalier of Thorns, Ba Sing Se, Spider Manifestation, or Meltstrider's Resolve could reveal or choose a land and the deck has no immediate mana-dependent action; Card text check required for Ba Sing Se, Spider Manifestation, and Meltstrider's Resolve.

- Mulligan mana rules are strict: keep hands with early green, at least two mana sources or a clear accelerant path, and a payoff or stabilizer. Ship hands with only colorless/utility access, no early castable spells, or expensive cards that rely on drawing both lands and devotion before interacting.

## Mulligan Guide
- Strong keep: Forest plus Elvish Mystic or Llanowar Elves, a second mana source, and a bridge payoff such as Kiora, Behemoth Beckoner, Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, or Voracious Hydra is the default keep. This hand advances mana, adds devotion, and gives the engine a turn-three decision that is not dependent on a perfect draw.

- Strong keep: Forest, Forest or Lair of the Hydra, Kiora, Behemoth Beckoner, Old-Growth Troll, and a scalable payoff is keepable even without Elvish Mystic or Llanowar Elves. This hand is slower but has real devotion and can convert Nykthos, Shrine to Nyx or Castle Garenbrig into a large Voracious Hydra or later Cavalier of Thorns.

- Medium keep: two green-producing lands, one early creature, and several unknown-text engine cards such as Ba Sing Se, Spider Manifestation, Meltstrider's Resolve, Badgermole Cub, or Scrapshooter is acceptable only when the legal game object text confirms at least one turn-two or turn-three play. Card text check required for those cards; do not keep a hand that only functions if their text is assumed.

- Risky keep: one Forest, Elvish Mystic or Llanowar Elves, Nykthos, Shrine to Nyx, and expensive payoffs can be kept on the play only when a second land or cheap spell is a high-value draw and the matchup is not punishing early creature removal. On the draw, this hand improves slightly because the extra card can find land, but it is still fragile if losing the mana creature strands the hand.

- Automatic ship: any seven with no green source, no castable spell before turn three, or Nykthos, Shrine to Nyx as the only mana source must be mulliganed. Also ship hands that contain Ugin, the Spirit Dragon, Cityscape Leveler, Cavalier of Thorns, and multiple utility lands but no early acceleration or devotion.

- Matchup-dependent keep: Scavenging Ooze plus early green mana is stronger when public matchup context shows graveyard pressure, but it is not enough by itself against fast creature decks unless the hand also has Voracious Hydra, Polukranos Reborn, Scrapshooter, or another early stabilizer. Against control or heavy interaction, hands with Shifting Ceratops are post-board keeps only when the mana can cast it on time.

- Play/draw adjustment: on the play, prioritize Elvish Mystic or Llanowar Elves into a turn-two permanent because tempo and devotion matter more than card volume. On the draw, accept a slightly slower two-land hand with Kiora, Behemoth Beckoner and multiple castable permanents if it has a clear turn-two play and a turn-three follow-up.

- Trap hand: Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Ugin, the Spirit Dragon, Cityscape Leveler, Cavalier of Thorns, and Voracious Hydra looks powerful but does not start the engine. Trap hand: multiple Spider Manifestation or Meltstrider's Resolve with no confirmed early text and no board presence should be treated as speculative until the rules engine exposes their legal actions.

## Turn Arc
- Turn 1: cast Elvish Mystic or Llanowar Elves off Forest whenever legal, because the deck's best starts begin with immediate acceleration. If no mana creature is available, play the land that preserves turn-two green and avoid exposing Nykthos, Shrine to Nyx before it produces meaningful mana.

- Turn 1 deviation: play Boseiju, Who Endures or Lair of the Hydra as the land only when the hand still casts its next spell. Hold Boseiju, Who Endures only if the current land count is already safe and the opponent has a visible high-impact target or likely matchup need for channel interaction.

- Turn 2: add devotion and board presence with Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, Scavenging Ooze, or Kiora, Behemoth Beckoner according to legal actions. Prefer the play that gives turn-three Nykthos, Shrine to Nyx or Castle Garenbrig the highest immediate payoff without ignoring visible attackers.

- Turn 2 deviation: use Voracious Hydra defensively only when the rules engine offers a legal fight or damage mode and a visible creature must be answered before it snowballs. Card text check required for Badgermole Cub, Scrapshooter, Ba Sing Se, Spider Manifestation, and Meltstrider's Resolve, so choose them early only after legal text confirms they develop mana, board, or selection.

- Turn 3: turn acceleration into a decisive mana step with Kiora, Behemoth Beckoner, Nykthos, Shrine to Nyx, Castle Garenbrig, or a large creature. The preferred pattern is to tap the strongest mana source, untap it with Kiora, Behemoth Beckoner when legal, then spend the burst on Cavalier of Thorns, Voracious Hydra, Polukranos Reborn, or another board-impacting action.

- Turn 3 deviation: stabilize before maximizing devotion when the opponent has lethal pressure developing. Use Scavenging Ooze life, Voracious Hydra interaction, Polukranos Reborn sizing, Scrapshooter, or a defensive Lair of the Hydra plan only when those legal actions materially change combat.

- Turns 4-5: commit the first true payoff when waiting risks losing tempo or life. Cavalier of Thorns, Ugin, the Spirit Dragon, Cityscape Leveler, a large Voracious Hydra, or a large Lair of the Hydra should be chosen based on visible board state: remove pressure, build a lethal board, or force interaction from control.

- Turns 4-5 deviation: avoid tapping out for Ugin, the Spirit Dragon or Cityscape Leveler if a smaller legal line answers the visible threat while preserving Nykthos, Shrine to Nyx follow-up. Use Boseiju, Who Endures, Scavenging Ooze, or sideboard artifacts only when the target or graveyard resource is visible and relevant.

- Late game: convert every land into a threat or burst-mana source. Lair of the Hydra becomes a finisher, Nykthos, Shrine to Nyx and Castle Garenbrig enable oversized Voracious Hydra turns, Scavenging Ooze pressures graveyards and life totals, and Ugin, the Spirit Dragon or Cityscape Leveler should close or reset only when their legal actions improve the current board more than attacking.

## Card Roles
- Elvish Mystic and Llanowar Elves are the turn-one acceleration package and should be cast before almost any tapped or speculative setup line when a Forest makes them legal. Their tactical job is to make turn-two devotion permanents and turn-three Nykthos, Shrine to Nyx or Castle Garenbrig payoffs real; do not hold them for bluff value unless the visible opponent threat makes a different legal action immediately necessary. Against removal-heavy decks, treat one mana creature as acceleration, not as a guaranteed mana source, and prefer hands that still function if it dies.

- Old-Growth Troll is an early devotion anchor, pressure body, and resilience piece. Cast it early when triple green is available because it improves Nykthos, Shrine to Nyx, triggers Kiora, Behemoth Beckoner if the engine sees the draw condition, and forces opponents to answer a meaningful body instead of only the mana creatures. Its death-related land role can rebuild mana after removal, so avoid trading it away only when preserving its attack pressure or devotion is more important than the body becoming a mana resource.

- Polukranos Reborn is a stabilizing body that adds heavy green devotion and blocks many aggressive starts. Cast it before slower payoff setup when the opponent has visible attackers, because reach and large toughness matter to the deck's survival window. Activate or transform it only after checking legal mana, board pressure, and whether spending the turn on a larger Voracious Hydra, Cavalier of Thorns, Ugin, the Spirit Dragon, or Lair of the Hydra creates a stronger board.

- Voracious Hydra is both scalable interaction and a mana sink, so choose its mode from visible board state rather than from generic curve pressure. Use it small or medium when a visible creature must be fought or removed to protect life total, Kiora, Behemoth Beckoner, or future Nykthos, Shrine to Nyx turns. Use it large when the board is stable and the deck needs a threat that converts Castle Garenbrig or Nykthos, Shrine to Nyx mana into immediate size. Do not choose fight lines into obvious bad combat math if the Hydra will die without removing the key threat.

- Badgermole Cub is a four-copy main-deck engine or pressure card, but card text check required before treating it as ramp, devotion, combat material, or selection. Cast it on curve only when the legal action text confirms it advances board, mana, or card flow in the current matchup. Keep it as a development play against control if it is a persistent engine; prefer stabilizers against aggro if it does not block or affect combat immediately.

- Scrapshooter is a four-copy main-deck role-player, but card text check required before assigning exact artifact, enchantment, reach, removal, or creature-sizing duties. If the rules engine exposes it as interaction for a visible permanent, prioritize it when that permanent is stopping Nykthos Ramp from developing or attacking. If it is only a creature on the current board, use it as devotion and battlefield presence, but do not assume hidden utility unless legal actions show it.

- Spider Manifestation is a four-copy payoff or engine card, but card text check required because the guide must not assume its token, graveyard, or combat behavior. Cast it when legal text and visible resources show it creates material board presence, stabilizes against attackers, or converts stocked graveyards into pressure. Avoid firing it into a board where a simpler Cavalier of Thorns, Voracious Hydra, or Ugin, the Spirit Dragon action answers the visible problem more directly.

- Meltstrider's Resolve is a four-copy main-deck support card, but card text check required before using it as protection, pump, selection, removal, or combo glue. Use it reactively only when the legal stack or prompt shows a concrete protected object, target, or mode. Use it proactively only when the engine exposes a legal action whose text clearly advances the selected line; do not spend mana on it just because the hand has spare green.

- Kiora, Behemoth Beckoner is the bridge between devotion bodies and explosive turns. Cast it when there is a meaningful permanent to untap or a high-power creature sequence that can draw cards, especially with Old-Growth Troll, Cavalier of Thorns, Polukranos Reborn, Voracious Hydra, Cityscape Leveler, or a large Lair of the Hydra. Protect it when the untap will create a decisive Nykthos, Shrine to Nyx or Castle Garenbrig turn; ignore loyalty preservation when the board requires immediate stabilization.

- Cavalier of Thorns is a top-end stabilizer, devotion source, and land-finding bridge. Cast it when the deck needs a large blocker, a land boost, or graveyard material for later resource lines, and prefer it before an eight-mana finisher when the visible board still requires blocking. Its death trigger can recover a high-impact card from the graveyard, so consider combat trades that set up Ugin, the Spirit Dragon, Cityscape Leveler, Voracious Hydra, or Nykthos, Shrine to Nyx follow-up if the engine offers that choice.

- Scavenging Ooze is graveyard interaction, life padding, and a scalable threat. Cast it early against graveyard decks or creature decks where life gain and growth matter, but do not consume green mana needed for a decisive Nykthos, Shrine to Nyx turn unless the target card is visible and relevant. Exile opposing graveyard cards first when they enable public recursion or delve-like pressure; exile own graveyard cards only when growth or survival is more important than Cavalier of Thorns recursion context.

- Cityscape Leveler is a single-copy finisher and catch-up tool. Commit it when the visible nonland permanent to answer is worth the full turn or when an attack trigger will dominate the game. Do not rush it over Ugin, the Spirit Dragon or a large Voracious Hydra if the issue is a wide board of colored permanents or a creature that can be answered for less mana. Card text check required for any unearth or alternate-zone action shown by the engine before using it.

- Ugin, the Spirit Dragon is the reset button and late-game closer. Use it when the visible board contains multiple colored permanents that must be cleared, when a direct damage ability removes a key threat, or when control has exhausted pressure and a planeswalker can dominate. Avoid casting Ugin, the Spirit Dragon into a board where it dies immediately and the minus action does not materially improve survival.

- Nykthos, Shrine to Nyx is the deck's defining mana engine, not a generic land. Play it when devotion is already present or the hand can build devotion quickly, and preserve sequencing that lets Kiora, Behemoth Beckoner untap it for a burst turn. Do not keep hands where Nykthos, Shrine to Nyx is the only mana source, and do not activate it before adding cheap devotion if the legal sequence allows more mana later in the same turn.

- Castle Garenbrig is a creature-payoff land that turns stable boards into oversized creatures. Use it for Voracious Hydra, Cavalier of Thorns, Polukranos Reborn, Cityscape Leveler, or Lair of the Hydra only when the engine confirms the mana can be spent legally. Sequence Forest early enough to keep Castle Garenbrig untapped when possible, but do not delay a necessary Nykthos, Shrine to Nyx line just to optimize it.

- Lair of the Hydra is both land and finisher. Play it early when it preserves the curve; hold or animate it late when board wipes, stalled combat, or excess mana make a land-threat valuable. Attack with it only after checking visible removal, blockers, and whether losing a land would shrink future Nykthos, Shrine to Nyx or Castle Garenbrig turns too much.

- Boseiju, Who Endures is main-deck interaction stapled to a land. Use it as a land when mana development is the bottleneck, and hold it when the opponent has visible artifacts, enchantments, or nonbasic lands that are more dangerous than the tempo cost of not playing it. Do not channel it into low-impact targets when Scrapshooter, Voracious Hydra, Ugin, the Spirit Dragon, or Cityscape Leveler can solve the visible board without sacrificing land development.

- Forest is the reliability glue for turn-one Elvish Mystic or Llanowar Elves and for untapped green sequencing. Prioritize Forest in openers so Castle Garenbrig and utility lands do not strand early spells.

- Ba Sing Se is a three-copy land or permanent in the registered main deck, but card text check required before treating it as mana, utility, devotion, protection, or a spell-like effect. Use it according to visible legal actions and avoid sequencing assumptions until the engine identifies its battlefield role.

## Interaction Priorities

- Remove engine stoppers first: use Boseiju, Who Endures, Cityscape Leveler, Ugin, the Spirit Dragon, or a fight-capable Voracious Hydra line on visible permanents that stop mana production, blank combat, lock activated abilities, or threaten Kiora, Behemoth Beckoner before spending interaction on ordinary attackers.

- Kill creatures that shorten the clock before value creatures: prioritize visible evasive, hasty, or scaling threats when life is under pressure; otherwise preserve Voracious Hydra for a creature that blocks the Nykthos, Shrine to Nyx payoff turn or invalidates a large Lair of the Hydra attack.

- Exile graveyards only when the target matters: use Scavenging Ooze on visible cards that enable recursion, escape-style pressure, graveyard combo, or lethal combat math before eating irrelevant cards for growth. Use Soul-Guide Lantern after sideboard when a whole graveyard matters more than one Scavenging Ooze activation.

- Save Boseiju, Who Endures for artifacts, enchantments, or nonbasic lands that materially change the game. Do not channel it into a low-impact permanent if playing it as a land enables Old-Growth Troll, Cavalier of Thorns, Ugin, the Spirit Dragon, Cityscape Leveler, or a large Voracious Hydra on schedule.

- Use Ugin, the Spirit Dragon as the reset, not routine removal. Commit it when multiple colored permanents must be cleared, when a single damage action protects Ugin and stabilizes, or when the opponent is low on board pressure. Avoid using Ugin, the Spirit Dragon into a board where it dies immediately after a minor minus.

- Treat Cityscape Leveler as expensive interaction plus inevitability. Use it on the permanent that prevents winning or surviving, not on a replaceable threat. Card text check required for any alternate-zone action; follow only visible legal-action text.

- Bait with redundant bodies before committing engines against interaction decks. Lead with Elvish Mystic, Llanowar Elves, Badgermole Cub, Scrapshooter, or Scavenging Ooze when the hand can still function after removal; protect Kiora, Behemoth Beckoner, Nykthos, Shrine to Nyx, Cavalier of Thorns, and Ugin, the Spirit Dragon until they generate immediate value or must be used.

- Ignore small ground creatures when the ramp turn wins the race. If life is stable and a large Voracious Hydra, Spider Manifestation, Polukranos Reborn, Lair of the Hydra, or Ugin, the Spirit Dragon is imminent, do not spend premium interaction on creatures that cannot force a bad block next turn.

- Sideboard changes interaction posture by matchup. Against graveyard decks, Scavenging Ooze, Soul-Guide Lantern, and The Stone Brain become priority tools. Against planeswalker, combo, or activated-ability decks, Sorcerous Spyglass and The Stone Brain should answer the visible or known engine. Against spell-chain or multispell decks, Damping Sphere changes from sideboard card to battlefield priority. Against blue or control decks, Shifting Ceratops is pressure, not removal.

- Do not invent counter, discard, exile, or bounce actions. Nykthos Ramp normally interacts through battlefield removal, graveyard exile, permanent answers, and sideboard hate; if the rules engine offers an unfamiliar action from Meltstrider's Resolve, Scrapshooter, Spider Manifestation, Badgermole Cub, or Ba Sing Se, card text check required before treating it as interaction.

## Combat And Trading Rules

- Attack only when the mana engine remains protected. Preserve Elvish Mystic, Llanowar Elves, Nykthos, Shrine to Nyx devotion bodies, and Kiora, Behemoth Beckoner defense when the next turn creates a larger payoff than a small damage attack.

- Trade small creatures when survival or planeswalker protection matters. Elvish Mystic and Llanowar Elves can block if life total, Kiora, Behemoth Beckoner, or Ugin, the Spirit Dragon would otherwise fall, but avoid trading them off before the first decisive Nykthos, Shrine to Nyx or Castle Garenbrig turn unless under real pressure.

- Use large green creatures to force bad blocks. Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Voracious Hydra, Badgermole Cub, Scrapshooter, Spider Manifestation bodies, and Lair of the Hydra should attack when visible blockers cannot trade profitably or when the opponent must chump to avoid lethal setup. Card text check required for exact Spider Manifestation, Badgermole Cub, and Scrapshooter combat abilities.

- Keep one stabilizing blocker against creature decks. If the opponent can crack back for a meaningful life swing, leave Cavalier of Thorns, Polukranos Reborn, a large Scavenging Ooze, or a large Voracious Hydra back unless the attack is lethal or creates an Ugin, the Spirit Dragon cleanup turn.

- Animate Lair of the Hydra with restraint. Attack with it when excess mana exists, visible blockers are favorable, and losing a land does not break future Nykthos, Shrine to Nyx, Castle Garenbrig, Ugin, the Spirit Dragon, or Cityscape Leveler plans. Do not animate into open visible removal or a trade that leaves the deck short on mana.

- Protect Kiora, Behemoth Beckoner through combat when untapping a land or large permanent will decide the next turn. Chump or trade to preserve Kiora if the untap creates a decisive Nykthos, Shrine to Nyx burst; let Kiora die if defending it prevents answering lethal pressure.

- Use Voracious Hydra as either removal or a finisher according to the board. If an opposing creature dominates combat, choose the line that removes it when legal. If the board is clear or chump-blocked, grow Voracious Hydra as the largest threat the mana allows.

- Race control and combo; stabilize against aggro. Against removal-heavy or slow decks, prioritize resilient pressure from Old-Growth Troll, Lair of the Hydra, Shifting Ceratops after sideboard, and planeswalkers. Against fast creature decks, block earlier, value Scavenging Ooze life gain higher, and use Voracious Hydra or Ugin, the Spirit Dragon to reset combat math.

- Treat protection effects as conditional until the engine shows them. Meltstrider's Resolve may influence combat only when legal action text identifies protection, pump, prevention, targeting, or another concrete mode; do not assume it saves a creature without rules-engine confirmation.

## Selection And Tutor Rules

- Treat this deck as pseudo-selection, not true tutoring. Cavalier of Thorns is the main card-flow selection card because it can find lands when the rules engine exposes that result; otherwise the deck mostly selects by sequencing mana, choosing Nykthos, Shrine to Nyx turns, and deciding when to spend flexible permanents.

- Use Cavalier of Thorns to secure the next big-mana turn first. When a legal selection choice shows multiple lands, favor Nykthos, Shrine to Nyx when devotion is already high or about to be high, Castle Garenbrig when creature-heavy payoffs are in hand, Boseiju, Who Endures when an opposing artifact, enchantment, or nonbasic land matters, and Lair of the Hydra when flooding makes a threat-land valuable.

- Preserve land-drop choice until the turn plan is clear. Play Forest early when Elvish Mystic, Llanowar Elves, Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, or Scavenging Ooze requires clean green mana. Play Nykthos, Shrine to Nyx when the same turn can activate it or when it will represent a decisive next-turn burst.

- Prefer permanent-based devotion over speculative selection. If the hand already has enough lands, choose lines that add Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Scrapshooter, Badgermole Cub, Spider Manifestation, or Voracious Hydra to the battlefield before using mana on low-impact filtering or graveyard actions.

- Bottom or deprioritize redundant mana only after payoff access is secure. Extra Forest, Castle Garenbrig, or mana creatures are valuable until Ugin, the Spirit Dragon, Cityscape Leveler, large Voracious Hydra, Lair of the Hydra, or repeated Nykthos, Shrine to Nyx activations are online; reduce their priority only when visible hand and board already produce enough mana.

- Use Kiora, Behemoth Beckoner selection indirectly through untap decisions. Untap Nykthos, Shrine to Nyx, Castle Garenbrig, or a high-yield permanent when that creates an immediate payoff; untap a creature only when a legal ability, blocker, or combat line matters more than mana. Treat Kiora card draw as engine output, not a reason to expose Kiora without protection.

- Use Scavenging Ooze graveyard selection surgically. Exile visible graveyard cards that enable recursion, escape-style threats, reanimation, delirium-style thresholds, or lethal combat math before eating random cards for size. After sideboard, Soul-Guide Lantern should handle whole-graveyard pressure when one-card Scavenging Ooze selection is too slow.

- Use sideboard named-card selection only from public or matchup-known information. The Stone Brain and Sorcerous Spyglass should name or identify cards only when the legal prompt and match context justify it; do not infer hidden hand contents. If the engine exposes a visible candidate list, choose the card or ability that blocks the opponent’s current engine, not a generic staple absent from public information.

- Follow legal-action text for unfamiliar selection from Ba Sing Se, Badgermole Cub, Scrapshooter, Spider Manifestation, and Meltstrider's Resolve. Card text check required for these cards before assuming draw, filter, tutor, target, protection, or graveyard behavior.

## Priority And Stack Rules

- Pass priority quickly when no meaningful action changes the turn. Nykthos Ramp is mostly proactive, so do not spend time activating Scavenging Ooze, Lair of the Hydra, Boseiju, Who Endures, or sideboard artifacts unless the visible stack, graveyard, combat, or permanent problem makes the action matter now.

- Respond to stack threats with Boseiju, Who Endures only when the target is legal and the permanent matters. Channel or activate it against artifacts, enchantments, or nonbasic lands that stop mana production, lock combat, enable combo, or prevent a payoff from resolving; otherwise keep it as a land for Nykthos, Shrine to Nyx, Castle Garenbrig, Ugin, the Spirit Dragon, Cityscape Leveler, or Voracious Hydra turns.

- Use Scavenging Ooze at instant speed when graveyard timing matters. Exile a card before the opponent can reuse it, before combat damage if life gain or size changes combat, or in response to a graveyard-targeting spell or ability. Do not drain green mana from a pending Voracious Hydra, Shifting Ceratops, Old-Growth Troll, or Nykthos, Shrine to Nyx plan for irrelevant growth.

- Activate Lair of the Hydra only after removal and combat information are as clear as the rules engine provides. Prefer end-step or attack-step activation when it produces lethal pressure, planeswalker pressure, or a necessary blocker; avoid exposing it into visible instant-speed removal or a bad block when the land is needed for future mana.

- Let opposing spells resolve when the deck has no legal useful response. Do not invent counterspell, discard, or protection actions. If Meltstrider's Resolve offers a legal protective or interactive action, Card text check required; use it only when visible text shows it protects a key permanent, wins combat, or preserves a payoff turn.

- Commit Voracious Hydra on the stack only when the target and mode advance the board. If the legal prompt offers creature removal, target a creature that blocks the payoff turn, threatens lethal, or dominates combat. If the board is stable, choose the larger threat line when legal.

- Use Ugin, the Spirit Dragon after the opponent commits enough colored permanents to justify the risk. Do not fire a minor stack or priority action first if preserving mana enables Ugin. Once Ugin resolves, choose the visible loyalty action that stabilizes or wins without assuming hidden follow-up.

- Respect optional payments and triggers exactly as prompted. Pay optional costs only when they protect a decisive creature, push lethal, answer a visible threat, or preserve the mana engine. Decline optional payments that consume mana needed for Nykthos, Shrine to Nyx, Castle Garenbrig, Voracious Hydra, Scavenging Ooze, or Lair of the Hydra.

- Use combat priority windows for survival and blowouts, not cosmetic actions. Before damage, consider Scavenging Ooze growth, Lair of the Hydra activation as a blocker if legal, Boseiju, Who Endures on a combat-enabling permanent, and any visible Meltstrider's Resolve action only when it changes lethal math, saves a key blocker, or removes an obstacle.

- Treat Cityscape Leveler and Spider Manifestation stack choices as conditional on engine text. Card text check required for alternate-zone actions, cast triggers, graveyard actions, token creation, or target prompts; follow only visible legal targets and do not assume inevitability beyond the rules-engine output.

## Sideboard Map

- Add Shifting Ceratops against blue decks, permission-heavy control, tempo decks with counterspells, and planeswalker shells that rely on blocking with blue creatures or answering one big spell at a time. Prioritize it when the opponent has shown countermagic, bounce, blue blockers, or a slow plan where an uncounterable haste threat can punish end-step pass turns. Reduce main-deck emphasis on Scrapshooter, Scavenging Ooze, or the slowest top-end threat when graveyard pressure and artifact/enchantment pressure are not central.

- Keep Shifting Ceratops lighter against creature-combo, low-to-ground aggro, and decks where protection from blue has no text. It is still a real body, but Nykthos Ramp wants sideboard cards to change a matchup, not just add another four-mana creature. Role changes: against control it is a primary threat; against tempo it is a stabilizer that attacks planeswalkers; against nonblue midrange it is only a rate card.

- Add Sorcerous Spyglass against planeswalkers, activated land threats, combo permanents, creature abilities, and artifact engines when the target is visible or strongly established by public matchup context. Name only from legal prompt options, visible battlefield cards, previously revealed cards, or matchup-known cards; do not infer hidden hand contents. Reduce main-deck emphasis on low-impact creature interaction when the opposing engine is ability-based rather than combat-based.

- Keep Sorcerous Spyglass lighter when the opponent wins through spells, static abilities, combat swarms, graveyard volume, or triggered abilities that Spyglass does not affect. Role changes: against planeswalker decks it is proactive disruption; against combo it is a naming lock piece; against unknown opponents it is risky unless public information identifies a target.

- Add The Stone Brain against linear combo, single-card engine decks, control decks built around a narrow finisher, and graveyard decks that depend on one named payoff more than graveyard volume. Use it after the opponent has revealed enough information to justify the name, or when matchup metadata gives a reliable target. Reduce main-deck emphasis on removal that has no target, excess graveyard nibbling, or the slowest expensive threat when the matchup is about preventing one card from deciding the game.

- Keep The Stone Brain lighter against redundant aggro, creature piles, and decks with many interchangeable threats. It costs time and mana, so do not spend an early turn on it when the visible battlefield demands Voracious Hydra, Polukranos Reborn, Scrapshooter, or Scavenging Ooze. Role changes: against combo it is a commitment gate; against control it is a late-game inevitability tool; against aggro it is usually too slow.

- Add Soul-Guide Lantern against graveyard recursion, delve-style resource plans, reanimation, escape-style threats, sacrifice loops, and decks where a single Scavenging Ooze cannot keep pace. Use Lantern as broad graveyard compression before committing green mana to Scavenging Ooze activations. Reduce main-deck emphasis on slow threats or narrow artifact/enchantment answers when graveyard velocity is the actual pressure point.

- Keep Soul-Guide Lantern lighter when the opponent uses the graveyard only incidentally or when Scavenging Ooze already answers the relevant cards while advancing life total and combat size. Role changes: against graveyard combo it is a safety valve; against attrition it is a cantrip-like pressure release if legal text permits; against fair creature decks it should not dilute the ramp plan.

- Add the sideboard Scavenging Ooze against graveyard decks, red or creature aggro where life gain matters, sacrifice decks with recursive creatures, and midrange games where graveyards fill naturally. Use it when the game will give repeated green mana windows and visible graveyard targets. Reduce main-deck emphasis on top-end or narrow noncreature interaction when stabilizing life total and graveyard pressure matters more.

- Keep the extra Scavenging Ooze lighter against exile-heavy control, decks with few creatures, and combo decks where spending green mana one card at a time is slower than The Stone Brain, Damping Sphere, or Soul-Guide Lantern. Role changes: against aggro it is a life-buffer creature; against graveyard decks it is repeatable hate; against control it is a modest threat that should not crowd out Shifting Ceratops.

- Add Damping Sphere against spell-chain combo, big-mana mirrors, decks that cast many spells in one turn, and opposing land engines that produce explosive mana. Deploy it early when it slows the opponent more than it harms Nykthos, Shrine to Nyx and Castle Garenbrig. Reduce main-deck emphasis on expensive payoffs or mana plans that become clunky under Sphere if the opponent is faster and the hate piece is required.

- Keep Damping Sphere lighter when Nykthos, Shrine to Nyx is your best route to victory and the opponent is not relying on multi-spell turns or burst mana. Role changes: against combo it is a speed brake; against big mana it is parity disruption; against fair aggro it can hurt your recovery more than theirs.

Blue-based Control
Side in: 4 Shifting Ceratops; 2 Sorcerous Spyglass; 2 The Stone Brain
Cut: 4 Scrapshooter; 2 Scavenging Ooze; 1 Cityscape Leveler; 1 Voracious Hydra

Graveyard Combo Or Recursion
Side in: 3 Soul-Guide Lantern; 1 Scavenging Ooze; 2 The Stone Brain
Cut: 4 Scrapshooter; 1 Cityscape Leveler; 1 Ugin, the Spirit Dragon

Spell-Chain Combo Or Big-Mana Mirror
Side in: 3 Damping Sphere; 2 The Stone Brain; 2 Sorcerous Spyglass
Cut: 2 Scavenging Ooze; 2 Scrapshooter; 1 Ugin, the Spirit Dragon; 1 Cityscape Leveler; 1 Voracious Hydra

Fast Creature Aggro
Side in: 1 Scavenging Ooze
Cut: 1 Cityscape Leveler

- Use exact plans only when the matchup label fits public information. If the opponent’s revealed cards show graveyard pressure plus blue permission, blend role priorities manually through legal sideboard validation rather than forcing a plan that misses the main axis.

- Preserve the Nykthos Ramp core in every configuration. Keep enough Forest, Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Elvish Mystic, Llanowar Elves, Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Kiora, Behemoth Beckoner, Cavalier of Thorns, Spider Manifestation, Meltstrider's Resolve, and payoff density to still create large mana turns. Sideboard cards should buy time or break resistance; they should not turn the deck into a low-pressure prison deck.

- Prefer sideboard cards that answer the opponent’s decisive axis over cards that merely look playable. Against permission, Shifting Ceratops matters more than Soul-Guide Lantern. Against graveyard recursion, Soul-Guide Lantern and Scavenging Ooze matter more than Shifting Ceratops. Against ability engines, Sorcerous Spyglass matters only when the named ability actually changes the visible or expected game.

- Reassess after each game using only logged public information and revealed cards. If Damping Sphere slowed your own Nykthos, Shrine to Nyx more than the opponent, reduce its priority next game unless their deck still depends on burst mana. If The Stone Brain had no reliable name, favor battlefield development. If Soul-Guide Lantern was idle while creatures killed you, favor Scavenging Ooze or main-deck stabilizers.

## Matchup Guidance
- Universal matchup rule: identify the opponent's decisive axis from public cards and legal actions, then choose the plan that either accelerates Nykthos, Shrine to Nyx turns or buys enough time for the big-mana turn. Respect runtime legality first; if the engine does not offer a line involving Voracious Hydra, Boseiju, Who Endures, Scavenging Ooze, Soul-Guide Lantern, Sorcerous Spyglass, Damping Sphere, The Stone Brain, or Shifting Ceratops, do not assume that line exists.

- Card text check required: treat Ba Sing Se, Badgermole Cub, Scrapshooter, Spider Manifestation, and Meltstrider's Resolve choices as conditional on visible legal text until the rules engine exposes their exact action labels. Use them according to role cues only when legal actions confirm the expected function, such as mana development, artifact/enchantment interaction, creature production, protection, or combat relevance.

- Aggro guidance: stabilize before maximizing devotion when life total or blockers are under pressure. Keep hands with early Forest plus Llanowar Elves or Elvish Mystic only when they also lead to a relevant body such as Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Voracious Hydra, Scavenging Ooze, or Scrapshooter. Add role cards: Scavenging Ooze when graveyards or life gain matter. Reduce main-deck emphasis: the slowest top-end threats when the game is about surviving turns two through five.

- Burn guidance: preserve life total and convert green mana into life gain, blockers, or a fast clock. Prioritize Scavenging Ooze activations when visible graveyards contain legal targets and life gain changes the race. Use Voracious Hydra to remove repeatable damage creatures before growing a noninteractive threat. Avoid spending early turns on Sorcerous Spyglass, The Stone Brain, or Damping Sphere unless public information shows a specific activated ability, single-card engine, or multi-spell axis that matters more than life.

- Go-wide guidance: build a board that blocks multiple attackers before investing in one oversized threat. Prefer Polukranos Reborn, Old-Growth Troll, Badgermole Cub, Spider Manifestation, and Voracious Hydra lines that reduce incoming damage or create enough bodies to make attacks bad. Use Ugin, the Spirit Dragon only if the game is likely to reach that mana and the visible battlefield makes a sweeper effect decisive. Do not animate Lair of the Hydra into trades that reduce future mana unless survival or lethal math requires it.

- Single-threat guidance: save flexible answers for the threat that actually decides combat, life total, or engine access. Voracious Hydra should fight or grow according to visible toughness, opposing removal risk, and whether a large body wins faster than removal. Boseiju, Who Endures should target a nonbasic land, artifact, or enchantment only when the exchange is worth the land granted by its effect if that text is relevant. Sorcerous Spyglass is strongest when public information identifies an activated ability that the opponent relies on.

- Tempo guidance: prioritize mana stability and threat quality over fragile overextension. Lead with Forest plus Llanowar Elves or Elvish Mystic when it advances a turn-two or turn-three must-answer permanent, but value land-heavy hands more highly when the opponent has shown repeated removal or bounce. Add role cards: Shifting Ceratops against blue permission or blue tempo pressure. Reduce main-deck emphasis: narrow artifact/enchantment interaction and graveyard nibbling when the opponent's real plan is to trade mana efficiency and keep you behind.

- Control guidance: make each threat demand an answer while preserving enough resources after sweepers. Shifting Ceratops is the preferred pressure card against blue control when legal because it attacks the counterspell axis better than slower top-end. The Stone Brain can matter when public information or matchup metadata identifies a narrow finisher or control engine. Sorcerous Spyglass should name only a visible or reliably known activated ability. Keep Lair of the Hydra as a post-sweeper threat and avoid committing every creature into an obvious reset.

- Removal-heavy guidance: diversify permanent types and avoid relying on a single mana creature to carry the game. Old-Growth Troll, Cavalier of Thorns, Kiora, Behemoth Beckoner, Lair of the Hydra, and Nykthos, Shrine to Nyx all help rebuild after one-for-one removal if the engine presents those lines. Scavenging Ooze can shrink graveyard resources while becoming a threat, but spend green mana only when the activation meaningfully changes size, life, or graveyard access. Add role cards: Scavenging Ooze or Shifting Ceratops according to graveyard and blue-pressure evidence.

- Midrange guidance: become the bigger battlefield deck instead of trading down on mana. Use early creatures to build devotion, then let Nykthos, Shrine to Nyx, Castle Garenbrig, and Kiora, Behemoth Beckoner convert board presence into Cavalier of Thorns, Voracious Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, or large Lair of the Hydra turns. Use Scavenging Ooze to pressure graveyards that fuel recursion or attrition. Do not spend The Stone Brain mana unless the opponent is demonstrably centered on one named card.

- Combo guidance: pair a fast clock with the correct hate piece rather than durdling with generic value. Add role cards: Damping Sphere against spell-chain or burst-mana combo, The Stone Brain against narrow named-card combo, Sorcerous Spyglass against activated-ability combo, and Soul-Guide Lantern or Scavenging Ooze against graveyard combo. Reduce main-deck emphasis: creature removal and expensive battlefield-only finishers when the opponent can win before combat matters. Use The Stone Brain only after a reliable name is available from matchup metadata, revealed cards, or public game actions.

- Big mana guidance: disrupt the mana engine while presenting a clock before the opponent's top-end eclipses yours. Damping Sphere is strongest when it slows the opponent more than Nykthos, Shrine to Nyx and Castle Garenbrig slow you; reassess after seeing both decks operate. The Stone Brain can remove a known payoff when public information gives a correct name. Sorcerous Spyglass can target activated lands or planeswalkers only when their ability is visible or reliably known. Pressure with Old-Growth Troll, Shifting Ceratops, Lair of the Hydra, or large Voracious Hydra instead of waiting indefinitely.

- Graveyard guidance: decide whether the matchup requires broad graveyard compression, repeatable exile, or named-card prevention. Soul-Guide Lantern is the broadest low-mana graveyard role card when the opponent uses volume, recursion, or combo setup. Scavenging Ooze is better when repeated green mana windows exist and life gain or creature growth matters. The Stone Brain belongs when the graveyard deck depends on a particular payoff more than on volume. Reduce main-deck emphasis: narrow artifact/enchantment answers and the slowest top-end cards when graveyard speed is the deciding axis.

- Artifact/enchantment guidance: use main-deck interaction only when the legal target is central to the opponent's plan. Scrapshooter and Boseiju, Who Endures should answer artifacts or enchantments when runtime legal text confirms a high-impact target. Cityscape Leveler and Ugin, the Spirit Dragon are late-game catch-up tools, not excuses to ignore early pressure. Sorcerous Spyglass can complement removal when the artifact or enchantment plan uses activated abilities. Damping Sphere is appropriate only when the artifact/enchantment deck also relies on burst mana or multi-spell turns.

- Role-blending guidance: choose the sideboard role by the opponent's actual pressure, not their broad archetype label. A graveyard-tempo deck may require Soul-Guide Lantern plus stable blockers; a control-combo deck may require Shifting Ceratops plus The Stone Brain; an artifact aggro deck may require Scrapshooter-style interaction while still respecting combat. When evidence is mixed, keep the Nykthos Ramp core intact and favor the card that answers the currently visible losing line.

## Specific Matchup Notes

- General/archetype-only note: revealed cards, legal actions, and public game actions override every archetype assumption here. Use matchup labels only to choose the first strategic posture, then update priority targets from visible permanents, graveyards, stack contents, and known hand information.

- Blue control or blue tempo: pressure early without committing every permanent into a visible reset. Add role cards: Shifting Ceratops and, when public information identifies a decisive activated ability or narrow win condition, Sorcerous Spyglass or The Stone Brain. Priority targets are counterspell bottlenecks, planeswalker-style activated abilities, and sweepers inferred from public play patterns. Preserve Lair of the Hydra as a closer after removal-heavy turns.

- Creature aggro: stabilize first, then turn the corner with larger bodies. Voracious Hydra, Polukranos Reborn, Scavenging Ooze, Old-Growth Troll, Badgermole Cub, and Spider Manifestation should be evaluated by visible combat math, not by abstract value. Scrapshooter, Meltstrider's Resolve, Ba Sing Se, and Spider Manifestation require Card text check required; use them conditionally when legal text confirms they add bodies, removal, protection, or stabilization. Reduce main-deck emphasis on slow top-end only when the opponent's clock makes Cityscape Leveler or Ugin, the Spirit Dragon unlikely to matter.

- Graveyard decks: compress the graveyard before the payoff turn, not after the opponent has already converted it. Add role cards: Soul-Guide Lantern, Scavenging Ooze, and sometimes The Stone Brain if public information reveals a single critical payoff. Priority targets are cards enabling recursion, escape-like pressure, reanimation, or graveyard-count payoffs. Do not spend Scavenging Ooze activations on low-impact cards if the same mana is needed for a stabilizing spell or lethal Lair of the Hydra activation.

- Combo decks: present a clock while choosing the hate piece that matches the engine. Add role cards: Damping Sphere for burst-mana or multi-spell combo, The Stone Brain for a known named-card combo, Sorcerous Spyglass for activated-ability combo, and Soul-Guide Lantern for graveyard combo. Priority targets are the card or ability that changes the game from setup to win attempt. Do not fire The Stone Brain on a guess when no matchup metadata, revealed card, or public action supplies a reliable name.

- Big mana mirrors or ramp: decide whether Damping Sphere hurts the opponent more than it hurts Nykthos, Shrine to Nyx, Castle Garenbrig, and large green turns. Add role cards: Damping Sphere, The Stone Brain, or Sorcerous Spyglass only when public information identifies the opposing mana engine or payoff. Priority targets are activated lands, planeswalker-style threats, and unique top-end cards. Pressure with Old-Growth Troll, Voracious Hydra, Cavalier of Thorns, Lair of the Hydra, Cityscape Leveler, or Ugin, the Spirit Dragon rather than waiting indefinitely.

- Artifact or enchantment engines: use interaction only on targets that matter to the opponent's plan. Scrapshooter and Boseiju, Who Endures should answer visible artifacts or enchantments when the exchange is worth the mana and any drawback shown by rules text. Sorcerous Spyglass belongs when the engine depends on activated abilities. Reduce main-deck emphasis on graveyard-only cards if the opponent's graveyard is not involved.

## Risk Summary

- Mana risk: hands with Nykthos, Shrine to Nyx, Castle Garenbrig, or Lair of the Hydra but too few early green sources can fail before devotion matters. Prioritize Forest plus Llanowar Elves or Elvish Mystic when the hand needs acceleration, but do not keep a hand that only works if a single mana creature survives known removal.

- Matchup risk: the deck can choose the wrong role when an opponent blends pressure with combo or graveyard value. Let revealed cards override archetype labels, and select Shifting Ceratops, Damping Sphere, Soul-Guide Lantern, Sorcerous Spyglass, The Stone Brain, or Scavenging Ooze according to the visible losing line.

- Draw risk: top-heavy draws with Cityscape Leveler, Ugin, the Spirit Dragon, Cavalier of Thorns, and large Voracious Hydra can stall without early mana. Kiora, Behemoth Beckoner, Nykthos, Shrine to Nyx, and devotion permanents reduce that risk only if the battlefield survives.

- Over-sideboarding risk: adding too many hate cards can weaken the devotion and threat core that makes Nykthos Ramp function. Keep enough main-deck emphasis on mana, devotion, and closers unless the opponent's visible plan demands a narrow answer.

- Graveyard risk: Scavenging Ooze and Soul-Guide Lantern are strong only if used before the graveyard payoff matters. Avoid spending green mana on low-impact exiles while behind on board unless life gain, size growth, or graveyard denial changes the next turn.

- Sweeper/removal risk: committing Llanowar Elves, Elvish Mystic, Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, and Spider Manifestation into obvious removal can leave Nykthos, Shrine to Nyx underpowered. Preserve Lair of the Hydra, Cavalier of Thorns, or a top-end follow-up when the opponent signals mass removal.

- Closer risk: large mana without a decisive payoff can lose to evasive threats, combo setup, or repeated removal. Convert big turns into Voracious Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, Cavalier of Thorns, or lethal Lair of the Hydra when legal actions and visible board state support it.

- Interaction risk: Boseiju, Who Endures, Scrapshooter, Sorcerous Spyglass, Damping Sphere, The Stone Brain, Soul-Guide Lantern, and Scavenging Ooze answer different problems and should not be treated as interchangeable. Match each answer to the exact visible permanent, graveyard, activated ability, or named-card dependency.

- Sequencing risk: playing lands or activating Nykthos, Shrine to Nyx in the wrong order can reduce available mana for Kiora, Behemoth Beckoner, Voracious Hydra, Scavenging Ooze, or Lair of the Hydra. Recalculate devotion, untap effects, Castle Garenbrig restrictions, and follow-up legal actions before spending mana.

## Test Feedback Checklist

- Deciding factor: record whether the game was won or lost by early mana, devotion density, top-end conversion, graveyard interaction, sideboard hate, combat math, or a specific unanswered permanent.

- Mulligans: note whether keep decisions had Forest plus Llanowar Elves or Elvish Mystic, whether hands with Nykthos, Shrine to Nyx were functional without a mana creature, and whether top-heavy hands with Cityscape Leveler or Ugin, the Spirit Dragon were punished.

- Mana: track turns where Castle Garenbrig, Nykthos, Shrine to Nyx, Lair of the Hydra, or Boseiju, Who Endures changed the available line. Flag missed sequencing where Kiora, Behemoth Beckoner could have untapped a mana source or where devotion was spent before confirming follow-up legal actions.

- Velocity: identify whether the deck advanced from mana creature into Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Kiora, Behemoth Beckoner, or Cavalier of Thorns quickly enough to matter.

- Engine quality: record whether Nykthos, Shrine to Nyx generated decisive mana or sat underpowered because creatures died, were not drawn, or were sideboarded around incorrectly.

- Removal and interaction: review each Voracious Hydra, Boseiju, Who Endures, Scrapshooter, Scavenging Ooze, Soul-Guide Lantern, Sorcerous Spyglass, The Stone Brain, and Damping Sphere decision against the exact visible target or known opponent plan.

- Card text checks: mark every meaningful decision involving Ba Sing Se, Badgermole Cub, Scrapshooter, Spider Manifestation, and Meltstrider's Resolve where Card text check required affected confidence, legality, or tactical evaluation.

- Sideboard impact: ask whether Shifting Ceratops, Damping Sphere, Soul-Guide Lantern, Sorcerous Spyglass, The Stone Brain, or the sideboard Scavenging Ooze answered the real losing line rather than diluting the devotion plan.

- Closing: record whether big mana became a lethal or stabilizing action through Voracious Hydra, Lair of the Hydra, Cavalier of Thorns, Cityscape Leveler, or Ugin, the Spirit Dragon, or whether mana was banked into low-impact actions.

- Role accuracy: evaluate whether the pilot correctly shifted between ramping, stabilizing, racing, preserving resources, and presenting hate. Flag games where the deck acted like pure ramp while needing to survive, or acted like control while needing to close.

- Mistakes: identify missed attacks, unsafe attacks, missed blocks, low-impact Scavenging Ooze activations, premature Boseiju, Who Endures use, overextension into public removal signals, and passes with meaningful mana available.

- Stranded cards: list cards stranded in hand and why, especially Ugin, the Spirit Dragon, Cityscape Leveler, Cavalier of Thorns, Voracious Hydra, Shifting Ceratops, Damping Sphere, The Stone Brain, and Sorcerous Spyglass.

- Overperformers and underperformers: tag cards that directly changed win probability and cards that repeatedly failed their assigned role in the matchup.

## First Tuning Questions

- Mana quantities: does the deck need more reliable early green sources, or are 12 Forest, 2 Castle Garenbrig, 3 Lair of the Hydra, 2 Boseiju, Who Endures, and 2 Nykthos, Shrine to Nyx producing the right balance of speed, utility, and devotion payoff?

- Mana creatures: are 2 Llanowar Elves and 2 Elvish Mystic enough for a ramp deck, or do losses show too many hands starting on fair mana without early acceleration?

- Devotion density: do Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, Spider Manifestation, Cavalier of Thorns, and Kiora, Behemoth Beckoner create enough stable devotion for Nykthos, Shrine to Nyx after removal?

- Top-end mix: is the split of 1 Cityscape Leveler and 1 Ugin, the Spirit Dragon correct, or do results call for more closers, fewer stranded expensive cards, or a different balance between board control and inevitability?

- Midgame conversion: does Voracious Hydra close and stabilize often enough as a 4-copy payoff, or does it underperform when the deck lacks excess mana or faces removal-heavy opponents?

- Aggro plan: does the deck stabilize creature matchups through Voracious Hydra, Scavenging Ooze, Polukranos Reborn, Spider Manifestation, Scrapshooter, and sideboard Scavenging Ooze, or is more early board presence needed?

- Control plan: do Shifting Ceratops, Lair of the Hydra, Old-Growth Troll, and Cavailer of Thorns-style pressure give enough resilience, or are games lost because threats are too expensive or too easy to answer one at a time?

- Combo plan: are Damping Sphere, The Stone Brain, Sorcerous Spyglass, Soul-Guide Lantern, Scavenging Ooze, and pressure correctly aligned against the combo field, or are sideboard slots split too thinly across hate categories?

- Graveyard plan: does main-deck Scavenging Ooze plus sideboard Soul-Guide Lantern and sideboard Scavenging Ooze meaningfully stop graveyard decks, or do games show the hate arriving too late or costing too much tempo?

- Artifact/enchantment plan: does Boseiju, Who Endures plus Scrapshooter answer the important permanents, or does Card text check required on Scrapshooter leave uncertainty that must be resolved before trusting that role?

- Role conflicts: does adding Damping Sphere interfere too much with Nykthos, Shrine to Nyx, Castle Garenbrig, and large turns, or is the opponent disruption worth the self-tax in the matchups where it appears?

- Custom-card confidence: before tuning quantities of Ba Sing Se, Badgermole Cub, Scrapshooter, Spider Manifestation, or Meltstrider's Resolve, verify exact text and log whether each card actually performed the assumed ramp, body, interaction, protection, or stabilization role.

## Veles Tactical Policy

### Policy: Keep Hands That Produce Early Green Mana
Priority: High
Decision families: mulligan
Cards: Forest; Llanowar Elves; Elvish Mystic; Nykthos, Shrine to Nyx; Castle Garenbrig; Lair of the Hydra
Phase windows: pregame
Runtime cues: opening hand; mulligan prompt; visible hand composition
Use when: keepable hands have an untapped green source plus Llanowar Elves or Elvish Mystic, or have two early lands plus a castable two- or three-mana development spell.
Avoid when: the hand relies on Nykthos, Shrine to Nyx without early devotion, contains stranded Cityscape Leveler or Ugin, the Spirit Dragon with no ramp, or lacks green source access.
Instructions: Prioritize functional acceleration over raw card count. Treat one-land hands as risky unless Forest plus mana creature plus multiple low-cost plays are present.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: First Creature Setup
Priority: Medium
Decision families: mana; priority
Cards: Llanowar Elves; Elvish Mystic; Forest
Phase windows: main phase one; turn one
Runtime cues: action:cast Llanowar Elves; action:cast Elvish Mystic
Use when: a legal turn-one mana creature is available from Forest and no higher-priority interaction or survival action is pending.
Avoid when: rules engine shows the creature cannot be cast, a forced precombat action exists, or the only green source must be reserved for an immediately required legal action.
Instructions: Establish Llanowar Elves or Elvish Mystic before slower devotion pieces because this deck converts early mana into Nykthos, Shrine to Nyx, Voracious Hydra, Cavalier of Thorns, and planeswalker pressure.
Pilot skill floor: low
No-API allowed: yes
Light-model allowed: yes

### Policy: Play Basic Green Source When It Is The Only Land Action
Priority: Low
Decision families: mana
Cards: Forest
Phase windows: main phase one; main phase two
Runtime cues: action:play Forest
Use when: Forest is the only legal land-play action and the player has not played a land this turn.
Avoid when: another land-play action is legal, landfall or custom-card text is pending, or the engine marks the action unavailable.
Instructions: Execute the visible Forest land play to unlock green spells and mana creatures.
Pilot skill floor: low
No-API allowed: yes
Light-model allowed: yes

### Policy: Nykthos Commitment Gate
Priority: High
Decision families: mana; priority
Cards: Nykthos, Shrine to Nyx; Kiora, Behemoth Beckoner; Old-Growth Troll; Polukranos Reborn; Cavalier of Thorns
Phase windows: main phase one; main phase two
Runtime cues: legal mana abilities; devotion count; available follow-up actions
Use when: activating or sequencing toward Nykthos, Shrine to Nyx can produce a decisive spell, large Voracious Hydra, Lair of the Hydra attack, or stabilizing play this turn.
Avoid when: devotion is low, Damping Sphere is active, the line strands a stronger follow-up, or visible interaction makes waiting materially safer.
Instructions: Count green devotion before and after each spell. Consider Kiora, Behemoth Beckoner untaps only when the engine exposes the relevant legal action.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Castle Garenbrig Restrictions
Priority: Medium
Decision families: mana
Cards: Castle Garenbrig; Voracious Hydra; Cavalier of Thorns; Cityscape Leveler; Polukranos Reborn
Phase windows: main phase one; main phase two
Runtime cues: legal mana abilities; creature spell actions; activated ability actions
Use when: Castle Garenbrig mana can legally pay for the creature spell or creature ability selected by the engine.
Avoid when: the intended follow-up is Ugin, the Spirit Dragon, Kiora, Behemoth Beckoner, sideboard artifact hate, or any noncreature action the restriction cannot pay for.
Instructions: Use Castle Garenbrig for creature-heavy turns and preserve unrestricted green mana for Scavenging Ooze, Boseiju, Who Endures, sideboard cards, and mixed-cost sequences.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Devotion Before Payoff Sequencing
Priority: Medium
Decision families: mana; priority
Cards: Old-Growth Troll; Polukranos Reborn; Badgermole Cub; Scrapshooter; Spider Manifestation; Nykthos, Shrine to Nyx
Phase windows: main phase one; main phase two
Runtime cues: castable permanents; Nykthos mana action; devotion-visible battlefield
Use when: casting a green permanent before activating Nykthos, Shrine to Nyx increases available mana and still leaves the payoff legal.
Avoid when: the permanent is low-impact under pressure, Card text check required affects legality, or the payoff must happen before exposing more permanents.
Instructions: Build devotion first when safe, then convert mana into the highest-impact legal payoff.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Big Threat Commitment Gate
Priority: High
Decision families: priority; mana
Cards: Cityscape Leveler; Ugin, the Spirit Dragon; Voracious Hydra; Cavalier of Thorns; Lair of the Hydra
Phase windows: main phase one; main phase two; combat
Runtime cues: expensive spell legal actions; planeswalker spell action; creature land activation
Use when: committing a finisher stabilizes the board, pressures lethal, answers a visible permanent, or waiting risks losing the mana window.
Avoid when: cheaper interaction is required to survive, open visible disruption changes the outcome, or the payoff can be improved by first adding devotion.
Instructions: Treat Cityscape Leveler and Ugin, the Spirit Dragon as commitment decisions, not automatic casts. Use Lair of the Hydra as a finisher only after checking blockers and postcombat needs.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Voracious Hydra Mode And Target Gate
Priority: High
Decision families: interaction; mana; selection
Cards: Voracious Hydra
Phase windows: main phase one; main phase two
Runtime cues: action:cast Voracious Hydra; target creature prompts; X payment prompts
Use when: Voracious Hydra can remove a visible creature, create a stabilizing blocker, or convert excess mana into lethal pressure.
Avoid when: the fight target is larger after damage math, protection or prevention is visible, or spending all mana prevents a required follow-up.
Instructions: Choose X from current mana and board needs. Use fight-style lines only when the legal prompt and visible stats support the exchange.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Scavenging Ooze Graveyard Timing
Priority: Medium
Decision families: interaction; mana
Cards: Scavenging Ooze
Phase windows: main phase; combat; end step; opponent graveyard interaction windows
Runtime cues: action:activate Scavenging Ooze; graveyard card targets; available green mana
Use when: exiling a visible graveyard card disrupts recursion, reduces a lethal line, grows Scavenging Ooze for combat, or gains life under pressure.
Avoid when: the target has no immediate relevance, green mana is needed for a higher-impact spell, or the graveyard card is not a legal target.
Instructions: Prefer opponent cards that matter to the current public line. Use own graveyard cards only when life, size, or survival clearly matters.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Boseiju Permanent Answer Gate
Priority: Medium
Decision families: interaction; mana
Cards: Boseiju, Who Endures
Phase windows: opponent end step; main phase; combat when legal
Runtime cues: action:channel Boseiju, Who Endures; artifact target; enchantment target; nonbasic land target
Use when: a visible artifact, enchantment, or nonbasic land is enabling the opponent's main plan or blocking this deck's mana engine.
Avoid when: Boseiju, Who Endures is needed as a land, the target is low-impact, or giving the opponent replacement resources is worse than waiting.
Instructions: Treat Boseiju as interaction first only against high-impact permanents. Preserve land drops in mana-light hands.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Custom Card Text Check Gate
Priority: Medium
Decision families: priority; interaction; combat; selection
Cards: Ba Sing Se; Badgermole Cub; Scrapshooter; Spider Manifestation; Meltstrider's Resolve
Phase windows: all legal windows
Runtime cues: legal actions naming Ba Sing Se; Badgermole Cub; Scrapshooter; Spider Manifestation; Meltstrider's Resolve
Use when: the rules engine exposes legal action text but the strategic meaning depends on exact card text.
Avoid when: a known card line has higher urgency or the visible action text does not reveal enough to justify commitment.
Instructions: Card text check required. Use only the visible legal action text, current board state, and known previous outcomes; do not infer hidden modes or unverified abilities.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Combat Pressure With Creature Lands And Large Bodies
Priority: Medium
Decision families: combat; mana
Cards: Lair of the Hydra; Old-Growth Troll; Polukranos Reborn; Cavalier of Thorns; Voracious Hydra; Shifting Ceratops
Phase windows: beginning of combat; declare attackers; declare blockers
Runtime cues: attack prompts; block prompts; Lair of the Hydra activation; visible blockers
Use when: attacking advances lethal, pressures planeswalkers, or leaves enough defense against the crack-back.
Avoid when: the attack exposes the only devotion source, trades a key blocker under short-clock pressure, or spends mana needed for interaction.
Instructions: Count visible return damage before animating Lair of the Hydra. Favor attacks with resilient or oversized threats after stabilizing.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Survival Blocks Before Engine Greed
Priority: High
Decision families: combat
Cards: Llanowar Elves; Elvish Mystic; Scavenging Ooze; Badgermole Cub; Scrapshooter; Polukranos Reborn; Old-Growth Troll
Phase windows: declare blockers; combat damage
Runtime cues: block prompts; visible attacker power; life total; available blockers
Use when: blocking prevents lethal, protects a planeswalker needed to stabilize, or preserves enough life to untap into a big mana payoff.
Avoid when: the block sacrifices the only route to a winning next-turn payoff and life total is not under meaningful pressure.
Instructions: Do not preserve mana creatures at the cost of dying. Keep devotion creatures alive only when survival is already covered.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Kiora Untap And Draw Conversion
Priority: Medium
Decision families: mana; priority
Cards: Kiora, Behemoth Beckoner; Nykthos, Shrine to Nyx; Castle Garenbrig; Voracious Hydra; Cavalier of Thorns
Phase windows: main phase one; main phase two
Runtime cues: action:activate Kiora, Behemoth Beckoner; untap target prompts; creature power draw triggers
Use when: untapping a mana source creates a concrete additional legal play or when a large creature trigger improves the current turn.
Avoid when: the untap target does not change legal follow-up actions, Kiora is exposed without payoff, or another line answers an immediate threat.
Instructions: Use Kiora as a mana multiplier, not a decorative permanent. Recheck legal actions after each untap or draw trigger.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Artifact And Enchantment Hate Selection
Priority: Medium
Decision families: interaction; selection
Cards: Scrapshooter; Boseiju, Who Endures; Cityscape Leveler
Phase windows: main phase; opponent end step; triggered or activated target prompts
Runtime cues: legal target artifact; legal target enchantment; action naming Scrapshooter; action naming Cityscape Leveler
Use when: the target is a visible permanent that constrains mana, combat, graveyard use, or the opponent's primary engine.
Avoid when: Card text check required prevents confidence in Scrapshooter, the permanent is low-impact, or a broader sweeper/finisher is more urgent.
Instructions: Prefer answers that also develop the board when possible, but do not let a must-answer permanent remain because of devotion greed.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Sideboard Hate Commitment
Priority: High
Decision families: sideboard; pregame
Cards: Damping Sphere; The Stone Brain; Sorcerous Spyglass; Soul-Guide Lantern; Scavenging Ooze; Shifting Ceratops
Phase windows: sideboarding; opening hand evaluation; early main phases
Runtime cues: sideboard plan prompt; post-board game; known matchup label; legal cast actions
Use when: the matchup is defined by combo, graveyard recursion, activated abilities, noncreature engines, or blue interaction where the named sideboard card directly attacks that axis.
Avoid when: adding hate dilutes early green development without targeting the opponent's real plan, or Damping Sphere materially harms Nykthos, Shrine to Nyx more than the opponent.
Instructions: Keep the ramp core intact. Bring hate that changes the matchup, then mulligan and sequence so the hate appears before the opponent's engine turn.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: The Stone Brain And Spyglass Naming Gate
Priority: Medium
Decision families: selection; interaction
Cards: The Stone Brain; Sorcerous Spyglass
Phase windows: main phase; resolution prompt
Runtime cues: name-a-card prompt; action naming The Stone Brain; action naming Sorcerous Spyglass
Use when: public matchup context or revealed information identifies a single card or activated ability as the opponent's engine, lock piece, or win condition.
Avoid when: no card name is known, the opponent has already diversified threats, or the selected name would be speculative hidden-information guessing.
Instructions: Use revealed cards and established matchup labels, not invented hand contents. Card names absent from the registered deck may be named only if public information or matchup context supports them.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Graveyard Hate Deployment
Priority: Medium
Decision families: interaction; mana; sideboard
Cards: Soul-Guide Lantern; Scavenging Ooze
Phase windows: early main phase; opponent graveyard setup; response windows
Runtime cues: action:cast Soul-Guide Lantern; action:activate Soul-Guide Lantern; action:activate Scavenging Ooze; graveyard-visible cards
Use when: the opponent's graveyard contains or is about to contain cards that enable recursion, escape, delve, reanimation, or lethal resource loops.
Avoid when: graveyard pressure is absent and casting hate delays essential ramp or board stabilization.
Instructions: Deploy Soul-Guide Lantern early when the matchup demands it. Hold activation until the graveyard action or lethal setup is visible unless waiting risks losing priority.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Shifting Ceratops Anti-Blue Pressure
Priority: Medium
Decision families: priority; combat; sideboard
Cards: Shifting Ceratops
Phase windows: main phase; combat
Runtime cues: action:cast Shifting Ceratops; activated ability prompts; blue-control matchup context
Use when: post-board pressure must dodge blue interaction or close before the opponent rebuilds.
Avoid when: the immediate board requires removal, graveyard hate, or a larger stabilizing blocker instead.
Instructions: Use Shifting Ceratops as resilient pressure. Choose activated modes only from legal prompts and visible combat needs.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Pass Priority Only After Checking Mana Sinks
Priority: Medium
Decision families: priority; mana; interaction
Cards: Lair of the Hydra; Scavenging Ooze; Boseiju, Who Endures; Voracious Hydra; Nykthos, Shrine to Nyx
Phase windows: all priority windows
Runtime cues: action:pass; available mana; legal activated abilities; legal spell actions
Use when: no legal spell, activation, attack setup, graveyard interaction, or mana conversion changes the visible board or protects survival.
Avoid when: a legal action spends mana for pressure, removal, life gain, graveyard disruption, or lethal setup.
Instructions: Before passing, scan Lair of the Hydra, Scavenging Ooze, Boseiju, Who Endures, Nykthos, Shrine to Nyx, and castable payoffs. Passing with unused mana is acceptable only when actions are low-impact or strategically harmful.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes
