# Strategy Specifications
## Deck Name And Archetype
- Strategy name: Nykthos Ramp is an Explorer green devotion, ramp, combo, and big-mana strategy built to convert early green permanents into oversized battlefield pressure and late-game mana sinks. The registered list is not a pure stock shell because it pairs familiar Nykthos devotion elements with deck-specific packages around Badgermole Cub, Scrapshooter, Spider Manifestation, Meltstrider's Resolve, and Ba Sing Se; treat it as a hybrid or rogue build until runtime logs prove the exact engine priorities.

- Validation status: the active validation contract reports Explorer format, 60 main-deck cards, 15 sideboard cards, and a passing main/sideboard count check. Registered main deck count is 60: 12 Forest; 2 Nykthos, Shrine to Nyx; 2 Castle Garenbrig; 3 Lair of the Hydra; 2 Boseiju, Who Endures; 3 Ba Sing Se; 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; 1 Cityscape Leveler; 4 Spider Manifestation; 1 Ugin, the Spirit Dragon; 4 Meltstrider's Resolve. Registered sideboard count is 15: 4 Shifting Ceratops; 2 Sorcerous Spyglass; 1 Scavenging Ooze; 2 The Stone Brain; 3 Soul-Guide Lantern; 3 Damping Sphere.

- Legality posture: trust Veles and the rules engine for legal actions, timing, format legality, and available mana at runtime, even when the strategic guide prefers a line. If a card is missing from the current engine, if a prompt exposes fewer choices than expected, or if Veles reports a stale action, choose only from the visible legal action list and avoid assuming a hidden alternate line exists.

- Mana identity: the deck is overwhelmingly green and wants early untapped green sources for Llanowar Elves, Elvish Mystic, Badgermole Cub, Scavenging Ooze, Scrapshooter, Voracious Hydra, Kiora, Behemoth Beckoner, and devotion growth. Nykthos, Shrine to Nyx is the key scaling land, Castle Garenbrig and Lair of the Hydra are late-mana or threat lands, and Boseiju, Who Endures is interaction that may also need to function as a land when green source density is strained.

- Role concern: the pilot should classify most opening games as proactive ramp unless visible pressure or disruption forces a stabilizing role. The deck has many expensive or scaling plays, so early turns should prioritize green mana development, devotion bodies, and durable board presence before holding up marginal interaction.

- Card text concern: Card text check required for Ba Sing Se, Badgermole Cub, Meltstrider's Resolve, Scrapshooter, and Spider Manifestation before assigning deterministic policy beyond legal-action text. The pilot may use visible engine labels, mana costs, targets, zones, counters, power/toughness, and generated legal actions, but should not infer unsupported text from card names.

- Opponent information status: no opponent deck, matchup, known hand, metagame target, or testing concern was supplied with this batch. Matchup policy should therefore be written from archetype-level Explorer expectations only when later sections need it, and any named opposing cards in policy `Cards:` must be omitted unless they are registered cards or prefixed as opponent examples outside `Cards:` fields.

## Thesis
- Assemble mana first: Nykthos Ramp wants early green sources, Llanowar Elves or Elvish Mystic, and sticky green permanents so Nykthos, Shrine to Nyx and Castle Garenbrig convert board presence into turns where one spell is much larger than the opponent's normal exchange. Prioritize keeping hands that can make meaningful mana by turn two and deploy permanents that increase devotion instead of spending early turns on low-impact reactive choices.

- Win through oversized threats and mana sinks: Voracious Hydra, Polukranos Reborn, Old-Growth Troll, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, and Lair of the Hydra give the deck several ways to turn excess mana into lethal pressure or board control. Choose the line that leaves the most resilient pressure when the opponent has visible removal, but choose immediate stabilization when opposing creatures are already racing your life total.

- Treat the custom engine cards cautiously: Badgermole Cub, Scrapshooter, Spider Manifestation, Meltstrider's Resolve, and Ba Sing Se are registered core cards, but Card text check required before assuming hidden tactical text. When Veles exposes legal actions for them, evaluate visible costs, targets, generated bodies, counters, card movement, and board impact from the rules-engine output rather than from card-name intuition.

- Do not play as a draw-go control deck: this list has interaction and disruption, but it is not trying to pass with mana unused while waiting for perfect answers. Use Boseiju, Who Endures, Voracious Hydra, Scavenging Ooze, Scrapshooter, Cityscape Leveler, Ugin, the Spirit Dragon, and sideboard artifacts to clear blockers, blunt engines, or break a lock only when those actions protect the ramp plan, stop lethal pressure, or create a decisive follow-up.

- Prioritize board-based mana, devotion, and pressure over speculative value: the deck's best games come from making the opponent answer a growing battlefield while Nykthos, Shrine to Nyx, Castle Garenbrig, and Lair of the Hydra scale every draw step. Avoid spending early turns on graveyard eating, sideboard artifact deployment, or utility land activation when the visible board says a mana creature or devotion permanent will produce a stronger next turn.

## Role Package
- Threats: Voracious Hydra is both a scalable creature and conditional creature interaction; use it as removal when a visible opposing creature blocks stabilization or lethal, and as a large body when the board is clear. Polukranos Reborn, Old-Growth Troll, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, Lair of the Hydra, Badgermole Cub, Scrapshooter, and Spider Manifestation are threat sources or threat-adjacent cards, but Card text check required for Badgermole Cub, Scrapshooter, and Spider Manifestation before assigning exact combat or token rules.

- Payoffs: Nykthos, Shrine to Nyx is the central payoff because green devotion turns ordinary permanents into explosive mana. Castle Garenbrig supports large green creature turns, Kiora, Behemoth Beckoner rewards high-power creatures and can untap important permanents, Voracious Hydra scales with spare mana, Lair of the Hydra converts land slots into late pressure, and Ugin, the Spirit Dragon or Cityscape Leveler can convert a big-mana turn into a reset or a must-answer permanent.

- Engines: Llanowar Elves and Elvish Mystic are the first engine layer because they compress the first two turns. Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Badgermole Cub, Scrapshooter, Spider Manifestation, Ba Sing Se, and Meltstrider's Resolve may contribute to devotion, board growth, or card flow, but Card text check required for Badgermole Cub, Scrapshooter, Spider Manifestation, Ba Sing Se, and Meltstrider's Resolve before treating them as deterministic engines.

- Velocity: Cavalier of Thorns can help find lands or stock zones when its text is available in the engine, while Kiora, Behemoth Beckoner can turn large creatures into cards if the visible trigger or legal action confirms it. Meltstrider's Resolve and Ba Sing Se may be velocity or setup tools only when rules-engine prompts show card selection, draw, impulse, counters, or other concrete output; otherwise keep them behind mana development and board pressure.

- Interaction: Boseiju, Who Endures is flexible permanent interaction but should remain a land when mana is short. Voracious Hydra, Scavenging Ooze, Scrapshooter, Cityscape Leveler, and Ugin, the Spirit Dragon are the main-deck interaction package; use them to answer visible threats, graveyards, artifacts, enchantments, planeswalkers, or wide boards only according to legal engine prompts and confirmed targets.

- Protection: this deck protects itself mostly by redundancy, battlefield size, mana advantage, and post-board hate rather than by holding reactive protection spells. Shifting Ceratops protects the pressure plan against blue interaction in post-board games, while Sorcerous Spyglass, The Stone Brain, Soul-Guide Lantern, Damping Sphere, Scavenging Ooze, Boseiju, Who Endures, and Ugin, the Spirit Dragon protect the strategy by constraining opposing engines.

- Recursion: Old-Growth Troll and Cavalier of Thorns may provide graveyard or return value if the engine exposes those triggered or activated choices, but do not assume a recursion line without visible legal actions. Scavenging Ooze can also turn graveyards into counters and life when legal targets exist, but it should not consume mana that is needed for a decisive Nykthos, Shrine to Nyx or Voracious Hydra turn unless the graveyard target matters now.

- Mana: Forest is the stable base, Llanowar Elves and Elvish Mystic provide acceleration, Nykthos, Shrine to Nyx provides devotion scaling, Castle Garenbrig supports large creature turns, Lair of the Hydra is both land and finisher, Boseiju, Who Endures is land plus interaction, and Ba Sing Se requires Card text check required before being treated as anything beyond the visible land or spell behavior shown by Veles.

- Sideboard modules: Shifting Ceratops is the anti-blue pressure module; Sorcerous Spyglass is the activated-ability information and lock module; The Stone Brain is the named-card extraction module; Soul-Guide Lantern and the extra Scavenging Ooze are graveyard modules; Damping Sphere is the spell-chain or big-mana constraint module. Bring them in only when the opposing plan shown by matchup, revealed cards, or public game actions makes their role more valuable than main-deck ramp density.

## Primary Win Conditions
- Build a devotion-fueled big-mana turn with Nykthos, Shrine to Nyx, then convert that mana into a board-dominating permanent or lethal-scale creature. The setup is Forest plus Llanowar Elves or Elvish Mystic, followed by green pips from Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Badgermole Cub, Scrapshooter, or other visible permanents; execute by using Nykthos, Shrine to Nyx after devotion is already on board, then cast or activate the largest legal payoff. Prioritize this line when the opponent is not presenting immediate lethal pressure and when adding one more devotion permanent makes Nykthos, Shrine to Nyx generate a materially larger turn.

- Use Voracious Hydra as the main scalable kill condition when excess mana is available and the battlefield does not require a sweeper. The setup is mana density from Llanowar Elves, Elvish Mystic, Castle Garenbrig, Nykthos, Shrine to Nyx, or an already-developed land base; execute by choosing a legal mode that either removes a blocker or makes Voracious Hydra large enough to end the game quickly. Prioritize fight/removal execution when a visible creature is stopping attacks or threatening lethal; prioritize body sizing when the opponent lacks a profitable block or removal is already taxed.

- Turn planeswalker or artifact-endgame mana into inevitability with Ugin, the Spirit Dragon or Cityscape Leveler. The setup is surviving into a high-mana turn while preserving enough board or lands to cast the payoff; execute Ugin, the Spirit Dragon when its visible loyalty actions can stabilize, clear the board, or pressure the opponent, and execute Cityscape Leveler when its cast or attack output can remove a decisive permanent or force a hard answer. Prioritize these cards when small creatures are stalled, when the opponent has built a permanent-based lock, or when one large threat is safer than committing several medium threats into visible sweepers.

- Use creature pressure backed by devotion scaling as the default win path when no single payoff is decisive. The setup is early mana creatures plus midgame threats such as Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Badgermole Cub, Scrapshooter, Spider Manifestation, and Voracious Hydra; execute by attacking when blocks are unfavorable for the opponent and by using interaction only to remove the permanent that changes the race. Prioritize this line against opponents spending early turns on setup, graveyard engines, planeswalkers, or spell-chain preparation rather than contesting the board.

## Secondary Win Conditions
- Finish through stalled boards with Lair of the Hydra when lands are abundant and creature slots have been answered. The setup is reaching enough mana that Lair of the Hydra can attack as a meaningful threat without sacrificing the ability to cast follow-up spells; execute only when animation is legal and the opponent’s visible blockers or instant-speed interaction do not make the land loss unacceptable. Prioritize this line after removal-heavy games, after sweepers, or when the opponent is low enough that one or two land attacks end the game.

- Win attrition games by extracting value from Cavalier of Thorns, Scavenging Ooze, Old-Growth Troll, and any confirmed text on Meltstrider's Resolve, Ba Sing Se, Scrapshooter, Badgermole Cub, or Spider Manifestation. Card text check required for the custom or unfamiliar cards before treating them as draw, recursion, token, or engine pieces; use only legal rules-engine prompts and visible outputs. Prioritize attrition when both players are low on cards, when graveyards contain legal Scavenging Ooze targets, or when the opponent has answered the first wave of devotion creatures but cannot beat repeated medium threats.

- Use Scavenging Ooze as a stabilizing threat when graveyards are relevant and mana is not needed for a larger immediate play. The setup is any graveyard with legal creature-card targets and green mana available; execute by eating cards that deny opponent recursion, grow Scavenging Ooze out of combat range, or gain life in a race. Prioritize this line when behind on life, when the opponent’s graveyard matters publicly, or when no higher-impact Nykthos, Shrine to Nyx or Voracious Hydra play is available.

- Use Boseiju, Who Endures as a pressure enabler rather than a primary plan. The setup is an opposing artifact, enchantment, or nonbasic land that blocks the big-mana plan, protects the opponent, or threatens to win; execute the channel action only when keeping Boseiju, Who Endures as a mana source is less important than answering that permanent. Prioritize this line against visible hate, mana engines, or lock pieces, not against replaceable permanents that do not affect the next decisive turn.

## Emergency Lines
- When behind on life, stabilize before maximizing devotion. Use Voracious Hydra as removal, Scavenging Ooze for legal life-gain targets, Polukranos Reborn or large creatures as blockers, and Ugin, the Spirit Dragon only when its visible action improves survival more than another body would. Do not spend mana on low-impact graveyard eating, speculative Ba Sing Se lines, or Lair of the Hydra attacks if the opponent’s next combat remains lethal.

- When behind on board, convert mana into removal or a reset before adding fragile acceleration. Voracious Hydra, Boseiju, Who Endures, Scrapshooter, Cityscape Leveler, and Ugin, the Spirit Dragon are the main tools, but Card text check required for Scrapshooter before assuming exact target classes or damage. Choose the line that changes combat math immediately; a larger future Nykthos, Shrine to Nyx turn is not enough if the visible board already kills you.

- When behind on cards, preserve threat density and avoid trading premium payoffs for minor tempo. Cavalier of Thorns and Kiora, Behemoth Beckoner may recover material when their triggers or legal actions are visible, while Lair of the Hydra turns land draws into pressure. Use Scavenging Ooze, Boseiju, Who Endures, and utility actions sparingly unless they deny a known opposing card or create a concrete two-turn path back into parity.

- When behind on mana or after losing Llanowar Elves and Elvish Mystic, make land drops and cast durable permanents over fancy sequencing. Forest, Castle Garenbrig, Nykthos, Shrine to Nyx, Lair of the Hydra, Boseiju, Who Endures, and Ba Sing Se should be sequenced according to visible legal mana needs; Card text check required for Ba Sing Se before relying on special production or abilities. Rebuild with Old-Growth Troll, Polukranos Reborn, and Cavalier of Thorns rather than holding threats for an ideal devotion turn that may never arrive.

- When primary win conditions are removed, shift to land pressure, sticky bodies, and validated engine cards. Lair of the Hydra, Scavenging Ooze, Cavalier of Thorns, Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, Spider Manifestation, and Meltstrider's Resolve can still win if the engine exposes legal pressure or value actions. Avoid conceding mentally after Ugin, the Spirit Dragon, Cityscape Leveler, or a large Voracious Hydra is answered; the deck’s fallback is repeated medium pressure plus mana advantage.

## Resource Model
- Mana is the deck's primary exchange rate, and nearly every resource should be judged by whether it produces, protects, or cashes in a large green turn. Forest, Llanowar Elves, Elvish Mystic, Castle Garenbrig, Nykthos, Shrine to Nyx, and Lair of the Hydra convert early tempo and land drops into oversized Voracious Hydra, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, or a lethal land attack.

- Life is a spendable buffer only when the next turn cycle improves your mana or board. Take damage to keep Llanowar Elves, Elvish Mystic, Kiora, Behemoth Beckoner, Old-Growth Troll, Polukranos Reborn, or a devotion engine alive, but switch to survival mode when visible attacks threaten lethal or force bad blocks. Scavenging Ooze converts graveyard creature cards plus green mana into life and size, so preserve green mana for it in races when no higher-impact spell is pending.

- Hand size matters less than mana quality once the deck has a payoff, but empty hands without a mana sink are fragile. Keep at least one payoff or engine card if possible; convert excess lands into Lair of the Hydra attacks, Boseiju, Who Endures channel actions, or Castle Garenbrig production when legal. Do not spend the last payoff into obvious visible interaction if waiting one turn adds Nykthos, Shrine to Nyx mana or Kiora, Behemoth Beckoner value.

- Board presence is both pressure and fuel for devotion. Favor permanents with multiple green pips or sticky bodies when Nykthos, Shrine to Nyx is present, and treat removal that preserves devotion differently from removal that empties the board. Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Badgermole Cub, Scrapshooter, Spider Manifestation, and Meltstrider's Resolve need card text checks where the engine presents unfamiliar outputs; follow visible legal actions rather than assuming text.

- Graveyards are a tactical resource for Scavenging Ooze and possibly for custom-card lines only when rules-engine prompts confirm them. Use Scavenging Ooze first to deny opponent graveyard payoffs, second to gain life against pressure, and third to grow beyond combat or damage ranges. Soul-Guide Lantern and the sideboard Scavenging Ooze are sideboard bullet resources for graveyard matchups; use their effects only when the visible graveyard card or count matters.

- Exile is usually a denial zone, not a value zone, unless the engine exposes legal play-from-exile actions. Track cards exiled by Soul-Guide Lantern, The Stone Brain, Ugin, the Spirit Dragon, or any confirmed custom-card effect as public information, and do not plan recursion from exile without an explicit legal action.

- Lands are threats, answers, and mana engines, so avoid treating land drops as automatic. Lair of the Hydra converts late land density into damage, Boseiju, Who Endures converts a land slot into interaction, Nykthos, Shrine to Nyx converts devotion into burst mana, and Castle Garenbrig converts land sequencing into large creature turns. Ba Sing Se requires card text check before relying on any special utility.

- Sacrifice fodder is not a default resource in this list. Do not sacrifice Llanowar Elves, Elvish Mystic, creature tokens, lands, or permanents unless the rules engine presents a legal action and the visible payoff is worth losing devotion, mana, or blockers.

- Tempo is gained by accelerating before interacting, then cashed in by forcing the opponent to answer one oversized spell per turn. Use Voracious Hydra, Boseiju, Who Endures, Scrapshooter, Cityscape Leveler, or Ugin, the Spirit Dragon to regain tempo only when the opposing permanent changes the race, blocks the mana engine, or threatens a faster win.

- Information changes priority. Respect revealed hands, known top cards, public graveyards, visible open mana, and logged sideboard cards before committing Nykthos, Shrine to Nyx, Ugin, the Spirit Dragon, Cityscape Leveler, or Lair of the Hydra; do not infer hidden interaction beyond archetype guidance unless public information supports it.

## Mana Guide
- Green mana is mandatory early, and colorless utility is secondary. Keep hands that can cast Llanowar Elves or Elvish Mystic on turn one or a two-mana green play on turn two; mulligan hands whose only early lands are awkward utility lands that cannot produce the needed green action. Forest is the cleanest opener because it supports every early green spell.

- Sequence untapped green before utility unless a specific legal action rewards the utility land. Turn-one Forest into Llanowar Elves or Elvish Mystic is preferred over delaying acceleration for Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Boseiju, Who Endures, or Ba Sing Se. Play Nykthos, Shrine to Nyx when devotion is already present or the next turn can exploit it.

- Preserve Nykthos, Shrine to Nyx for burst turns rather than exposing it as a low-output land when the hand still needs stable green. If the opening hand has one Forest and one Nykthos, Shrine to Nyx, cast the mana creature first when legal, then deploy Nykthos after devotion exists. If Nykthos produces less than an ordinary land and a spell must be cast now, use ordinary green mana first.

- Use Castle Garenbrig for creature payoffs when its legal mana restriction fits the spell. Prioritize it for Voracious Hydra, Cavalier of Thorns, Polukranos Reborn, Old-Growth Troll, Cityscape Leveler if legal, or other creature lines only when the rules engine confirms payment is valid. Do not route Castle Garenbrig mana into planeswalkers, artifacts, abilities, or noncreature custom-card actions unless Forge explicitly allows it.

- Treat Lair of the Hydra as a land early and a win condition late. Play it early if it is needed to hit land count, but avoid unnecessary animation while the opponent has visible profitable blockers or interaction. When mana is abundant, compare Lair of the Hydra damage against casting a permanent that adds devotion or stabilizes the board.

- Use Boseiju, Who Endures as a green source until a visible artifact, enchantment, or nonbasic land must be answered. Channeling Boseiju should cost a land drop or mana source only when the target blocks Nykthos mana, stops combat, threatens lethal, or enables the opponent's engine.

- Play lands before draw or selection when the current turn needs guaranteed mana for a legal action. Wait to play a land when Kiora, Behemoth Beckoner, Cavalier of Thorns, Meltstrider's Resolve, Ba Sing Se, Badgermole Cub, Spider Manifestation, or Scrapshooter presents a visible draw, reveal, search, or selection action that could change the best land. Card text check required for those unfamiliar cards before using this as a deterministic rule.

- Keep mana open only for visible activated abilities or interaction. Scavenging Ooze, Boseiju, Who Endures, Lair of the Hydra, and any engine-confirmed custom action can justify holding mana; otherwise spend mana proactively to increase board, devotion, or pressure.

- Mulligan mana-light hands without acceleration or payoff discipline. A one-land hand needs Llanowar Elves or Elvish Mystic plus castable green and a strong follow-up; a slow multi-utility-land hand needs a clear turn-two play and enough green for Voracious Hydra, Kiora, Behemoth Beckoner, Scavenging Ooze, or other early interaction. Mana-heavy hands are keepable only with Nykthos, Shrine to Nyx, Lair of the Hydra, or a payoff that uses the surplus.

## Mulligan Guide
- Strong keeps accelerate on turn one and convert mana into devotion or a payoff by turn three. Keep hands like Forest, Llanowar Elves, Nykthos, Shrine to Nyx, Old-Growth Troll, Voracious Hydra, Kiora, Behemoth Beckoner, and any third land because they present mana, devotion, card flow, and a scalable answer.

- Strong keeps without Nykthos, Shrine to Nyx need clean green sequencing and a meaningful payoff. Keep Forest, Forest, Elvish Mystic, Polukranos Reborn, Voracious Hydra, Cavalier of Thorns, and Lair of the Hydra because the hand ramps, blocks, removes, and has a late threat.

- Medium keeps have mana and action but lack either acceleration or a large payoff. Keep two or three Forest hands with Kiora, Behemoth Beckoner, Scavenging Ooze, Voracious Hydra, and Old-Growth Troll on the play only when the curve is legal and the matchup does not punish a slower first turn.

- Risky keeps are one-land hands that depend on Llanowar Elves or Elvish Mystic living. Keep one Forest plus Llanowar Elves or Elvish Mystic only with at least one castable follow-up and a payoff such as Kiora, Behemoth Beckoner, Old-Growth Troll, Voracious Hydra, or Polukranos Reborn; ship it against visible or expected heavy cheap removal unless the mulligan would be worse.

- Automatic ships lack early green mana, early plays, or payoff discipline. Ship hands with no Forest or other confirmed early green source, hands with only Nykthos, Shrine to Nyx plus utility lands, hands that start on Cityscape Leveler and Ugin, the Spirit Dragon without acceleration, and hands whose first meaningful spell is Cavalier of Thorns with no mana creature.

- Matchup-dependent keeps change around pressure and graveyards. Against fast creature decks, prioritize Voracious Hydra, Polukranos Reborn, Scavenging Ooze, and early blockers over slow Nykthos-only setup; against graveyard decks, value Scavenging Ooze plus green mana higher; against control, value sticky devotion, Lair of the Hydra, Shifting Ceratops after sideboard, and resilient threats over small removal-only hands.

- Play/draw decisions should respect acceleration fragility. On the play, keep more one-mana-creature hands because a turn-two three-drop or Kiora, Behemoth Beckoner can snowball; on the draw, demand either a second mana source, a stabilizer such as Voracious Hydra, or a way to recover if Llanowar Elves or Elvish Mystic dies.

- Trap hands look powerful but fail to cast spells on time. Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Boseiju, Who Endures, Cityscape Leveler, Ugin, the Spirit Dragon, and Cavalier of Thorns is a ship unless the engine confirms early green and legal acceleration; several payoff cards do not replace a functioning first two turns.

- Card text check required for Badgermole Cub, Ba Sing Se, Scrapshooter, Spider Manifestation, and Meltstrider's Resolve before keeping a hand that relies on their exact text. Keep them as curve plays only when the rules engine shows castable actions and their visible role fits ramp, devotion, interaction, or stabilization.

## Turn Arc
- Turn 1 priority is untapped green into Llanowar Elves or Elvish Mystic. Prefer Forest into the mana creature, and delay Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Boseiju, Who Endures, or Ba Sing Se unless the current legal mana output still casts the accelerator.

- Turn 1 deviation is playing a utility land only when no one-mana creature is available or the land is needed for future sequencing. Use Boseiju, Who Endures as a land if there is no urgent target, and do not hold it for interaction when missing the first land drop would slow every payoff.

- Turn 2 priority is adding devotion while keeping the curve alive. Cast Old-Growth Troll, Polukranos Reborn, Kiora, Behemoth Beckoner, Scavenging Ooze, Badgermole Cub, Scrapshooter, Spider Manifestation, or Meltstrider's Resolve only when the engine confirms legality; choose the play that produces the strongest board against the visible opponent pressure.

- Turn 2 deviation is using Voracious Hydra early when a visible creature must die or be contained. Do not spend Voracious Hydra as a small body if the opponent is not pressuring life total, devotion, or key planeswalkers and a larger X will be available soon.

- Turn 3 priority is the first big-mana pivot. If Nykthos, Shrine to Nyx now produces excess mana, convert it into Voracious Hydra, Cavalier of Thorns, multiple permanents, or Kiora, Behemoth Beckoner plus a creature; if Nykthos is not online, continue building green pips and land count.

- Turn 3 deviation is holding interaction when a visible permanent blocks the ramp plan. Use Boseiju, Who Endures, Scrapshooter, Voracious Hydra, or Scavenging Ooze only when the target matters to the board, the graveyard, or the opponent's engine; otherwise increase devotion and pressure.

- Turns 4-5 priority is forcing one high-impact spell per turn while retaining a backup mana line. Cast Cavalier of Thorns, a large Voracious Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, or an engine-confirmed custom payoff when it changes the board immediately or creates a clock the opponent must answer.

- Turns 4-5 deviation is not tapping out blindly into known interaction or lethal pressure. If public information shows a sweeper, counterspell window, graveyard threat, or faster attack, prefer Lair of the Hydra pressure, Scavenging Ooze activation, Boseiju, Who Endures, or a smaller two-spell turn over a single fragile payoff.

- Late game priority is converting mana into inevitability without losing to visible attacks. Animate Lair of the Hydra when it threatens lethal or planeswalker removal through known blockers; cast Ugin, the Spirit Dragon or Cityscape Leveler when a board reset or permanent answer is worth more than adding another creature.

- Late game deviation is respecting deck exhaustion and graveyard leverage. Use Scavenging Ooze to deny public graveyard cards before gaining incidental life, preserve Boseiju, Who Endures for must-answer permanents, and let Nykthos, Shrine to Nyx create multi-action turns instead of spending all mana on the first legal expensive action.

## Card Roles
- Llanowar Elves is the highest-priority turn-one accelerator because it turns medium hands into Nykthos, Shrine to Nyx hands. Cast it before slower setup when a green source is available, protect it only by sequencing rather than holding it, and assume removal-heavy opponents can punish one-land keeps that rely entirely on it.

- Elvish Mystic has the same tactical job as Llanowar Elves and should be evaluated as copies three and four of the one-mana ramp package. Prioritize hands where Elvish Mystic enables turn-two Kiora, Behemoth Beckoner, Old-Growth Troll, Polukranos Reborn, or a larger Voracious Hydra, and do not expose it to combat unless the trade protects a planeswalker or life total from a meaningful attack.

- Old-Growth Troll is a devotion anchor, pressure piece, and post-removal mana asset. Cast it early when the mana supports triple-green pressure, use it to turn on Nykthos, Shrine to Nyx, and value its death trigger when the opponent is spending real removal; avoid delaying Old-Growth Troll for speculative bigger plays when the board needs green pips now.

- Polukranos Reborn is a stabilizing body that buys time against creatures while adding devotion. Cast it when reach, size, or a future mana sink matters, but do not treat its transform line as automatic; spend mana on transforming only when the rules engine presents the legal action and the current board rewards a single larger threat over multiple actions.

- Voracious Hydra is both scalable removal and a mana payoff, so its timing should follow board pressure rather than curve habit. Use small Voracious Hydra only to answer a visible creature that threatens life total, Kiora, Behemoth Beckoner, devotion development, or lethal math; otherwise hold it for Nykthos, Shrine to Nyx or Castle Garenbrig turns where X becomes large enough to dominate combat or remove the opponent's best creature.

- Badgermole Cub needs card text verification before the guide assumes its exact tactical role. Card text check required; while unverified, cast Badgermole Cub only when the engine shows it as legal and its visible stats or abilities make it a better devotion, ramp, pressure, or stabilization play than the alternatives.

- Kiora, Behemoth Beckoner is a bridge between ramp and payoff because she can convert large creatures into cards and can untap mana sources when the rules engine offers that line. Cast Kiora, Behemoth Beckoner before a high-power creature when doing so safely generates a draw trigger, prioritize untapping Nykthos, Shrine to Nyx or another high-output mana permanent when legal, and avoid exposing her to trivial attacks if a creature play would protect her first.

- Cavalier of Thorns is the deck's main midgame glue: it adds devotion, blocks, fills resources, and helps land-heavy big-mana turns. Cast it when reaching five mana stabilizes the battlefield or finds more mana, but check visible pressure before tapping out; against exile removal or counterspell-heavy opponents, consider whether Lair of the Hydra, smaller threats, or multiple spells create a less fragile turn.

- Scavenging Ooze is graveyard interaction first and incidental lifegain second. Hold green mana for Scavenging Ooze activations when public graveyards contain cards that matter, eat opponent cards before harmless cards from your own graveyard, and grow it before combat only when the size change affects blocks, attacks, survival, or lethal math.

- Scrapshooter needs card text verification before committing to exact targets or timing. Card text check required; use Scrapshooter as a legal action only when the engine exposes a clear target, interaction mode, devotion body, or board-development role, and avoid choosing it over known ramp payoffs unless the visible board shows the effect matters now.

- Spider Manifestation needs card text verification before the agent relies on it as a token, graveyard, reach, or stabilization engine. Card text check required; cast Spider Manifestation only when the rules engine confirms legality and the visible result is likely to improve defense, devotion, board count, or pressure more than holding mana for Voracious Hydra, Scavenging Ooze, Boseiju, Who Endures, or Lair of the Hydra.

- Meltstrider's Resolve needs card text verification before it is treated as protection, removal, ramp, or selection. Card text check required; while unverified, do not keep hands that rely on its hidden text to function, and during play choose it only from visible legal action text when it clearly advances mana, protects a key permanent, answers pressure, or enables a payoff turn.

- Cityscape Leveler is the top-end permanent answer and inevitability card, not an early-game plan. Cast Cityscape Leveler when Nykthos, Shrine to Nyx, Castle Garenbrig, Kiora, Behemoth Beckoner, or land acceleration makes it legal and the target or body changes the game; do not keep slow hands solely because Cityscape Leveler is present.

- Ugin, the Spirit Dragon is the emergency reset and late-game closer. Use Ugin, the Spirit Dragon when the board is too wide for creature combat, when a minus ability can swing survival, or when a plus ability starts a protected clock; avoid firing a reset that destroys your own winning devotion board unless the visible opponent board is otherwise lethal or unbeatable.

- Nykthos, Shrine to Nyx is the deck's engine land and should be sequenced around devotion count. Play it when it will soon produce excess mana, protect it from legendary dead draws by not overvaluing multiples, and prefer adding green pips before activating it if the resulting mana unlocks a larger Voracious Hydra, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, or multi-spell turn.

- Castle Garenbrig is a creature-payoff land that helps cast or scale creature threats. Use Castle Garenbrig when its restrictions still pay for the intended creature line, especially Voracious Hydra, Cavalier of Thorns, Polukranos Reborn, Old-Growth Troll, or Cityscape Leveler; do not assume it pays for noncreature spells or activated abilities unless the engine confirms the payment.

- Lair of the Hydra is both land and late-game threat, so preserve it as a mana source until animation has a concrete job. Animate Lair of the Hydra to pressure planeswalkers, threaten lethal, punish sweepers, or create a blocker, but avoid walking it into obvious bad combat when casting a real spell would add devotion or answer the board.

- Boseiju, Who Endures is a land first when the opening hand needs mana and interaction later when a visible permanent matters. Hold Boseiju, Who Endures only if mana is already secure and the opponent has a must-answer artifact, enchantment, or land; otherwise play it to keep the ramp curve intact.

- Ba Sing Se needs card text verification before being assigned a land, spell, engine, or utility role. Card text check required; use Ba Sing Se according to engine-presented legal actions, and never keep or sequence a hand assuming unverified fixing, devotion, ramp, or interaction from it.

- Forest is the safest early land because it casts Llanowar Elves, Elvish Mystic, Scavenging Ooze, and the green-heavy devotion curve. Prefer Forest on turn one unless another land is required by legal action output, and count Forest carefully for Old-Growth Troll death lines, Castle Garenbrig conditions, and hands that need untapped green.

## Interaction Priorities

- Remove battlefield snowballs before raw damage when the opponent's permanent will invalidate Nykthos, Shrine to Nyx turns. Use Voracious Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, Boseiju, Who Endures, or engine-confirmed Scrapshooter lines first on permanents that shut off mana, answer devotion, race Kiora, Behemoth Beckoner, or create an immediate lethal clock; delay removal on small attackers that can be blanked by Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Spider Manifestation, or a large Lair of the Hydra.

- Kill creatures that attack the engine before creatures that only attack life total. Prioritize flyers, evasive threats, must-block attackers, mana creatures enabling a faster combo turn, and creatures that can remove or pressure Kiora, Behemoth Beckoner; ignore ground creatures that cannot profitably attack through Polukranos Reborn, Old-Growth Troll, Cavalier of Thorns, Voracious Hydra, or Spider Manifestation tokens unless life is under real pressure.

- Use Voracious Hydra as creature interaction only when the visible target matters now. Small X should answer a creature that threatens lethal, planeswalker survival, devotion snowballing, or a combo clock; large X should be saved for a Nykthos, Shrine to Nyx or Castle Garenbrig turn when it can both remove the best creature and leave a dominant body. Do not spend Voracious Hydra on a replaceable creature if the opponent has a single larger visible threat you cannot otherwise beat.

- Use Boseiju, Who Endures for must-answer artifacts, enchantments, or lands, not routine inconvenience. Hold it when mana is stable and the opponent presents a permanent that stops Nykthos, Shrine to Nyx, graveyard use, creature combat, or big spells; play it as a land when missing development would prevent Llanowar Elves, Elvish Mystic, Kiora, Behemoth Beckoner, or Cavalier of Thorns from coming online.

- Use Scavenging Ooze to exile cards that change future legal lines before eating harmless material for size. Exile opponent graveyard cards that enable recursion, escape, flashback-like actions, delirium-style scaling, reanimation, or lethal graveyard payoffs before exiling your own cards; activate before combat only when the counter or life gain changes attacks, blocks, survival, or lethal math.

- Use Ugin, the Spirit Dragon as a reset only when creature combat and targeted answers fail. Prefer plus or smaller engine-confirmed interaction when the current devotion board is winning; use the reset when the opponent's board is wider, more evasive, or too large for Voracious Hydra and blockers to contain. Do not destroy your own winning board just to simplify a game already controlled by Nykthos, Shrine to Nyx.

- Bait interaction with redundant bodies before committing scarce finishers. Against open mana or known removal, lead with Llanowar Elves, Elvish Mystic, Badgermole Cub, Scavenging Ooze, Scrapshooter, or a medium Voracious Hydra when those plays still advance devotion; preserve Kiora, Behemoth Beckoner, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, and a lethal Lair of the Hydra for turns where the opponent is tapped low, taxed by prior threats, or forced to answer the board.

- Treat unverified card text as conditional interaction. Badgermole Cub, Scrapshooter, Spider Manifestation, Meltstrider's Resolve, and Ba Sing Se all require card text check required; choose their interaction modes only when the rules engine exposes legal action text that clearly answers a visible problem, protects a key permanent, or improves the current board more than holding mana.

## Combat And Trading Rules

- Preserve devotion creatures when the next Nykthos, Shrine to Nyx activation is the strongest line. Avoid trading Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Voracious Hydra, and multiple green-pip bodies for minor attackers when that trade shrinks a coming payoff turn; trade them when life is low, Kiora, Behemoth Beckoner would die, or the opponent's creature is a higher-value engine than your devotion count.

- Attack only when the attack does not expose the mana engine to a worse crack-back. Llanowar Elves and Elvish Mystic are mana first and attackers last; keep them back when they enable a larger spell next turn or block a one-toughness attacker. Send Old-Growth Troll, Polukranos Reborn, Voracious Hydra, Cavalier of Thorns, and Spider Manifestation bodies when they pressure planeswalkers, force bad blocks, or shorten the clock without losing board control.

- Block aggressively below 8 life and selectively above 14 life. At high life, taking small ground damage is acceptable to keep devotion, preserve Scavenging Ooze mana, and set up Nykthos, Shrine to Nyx; at 8 life or lower, prioritize survival over future mana unless a visible next-turn payoff clearly stabilizes. Against fast creature decks, stabilize first, then convert large bodies and Lair of the Hydra into offense.

- Use Lair of the Hydra as a combat threat only when the land is not needed for the next spell. Animate it to kill a planeswalker, present lethal, punish sweepers, or block an attacker that otherwise wins; do not animate into open removal or a bad block when losing the land would strand Cityscape Leveler, Ugin, the Spirit Dragon, Cavalier of Thorns, or a large Voracious Hydra.

- Protect Kiora, Behemoth Beckoner with board position before greed. If Kiora, Behemoth Beckoner is drawing cards or untapping high-output mana, block to keep her alive when the trade is not catastrophic; if protecting her costs the only creature that enables Nykthos, Shrine to Nyx, compare whether the next mana turn is more important than one more activation.

- Trade Scavenging Ooze only after using relevant graveyard windows. If public graveyards contain important cards and green mana is available, activate Scavenging Ooze before blocks or damage when legal; do not trade it away while it is the only visible answer to the opponent's graveyard engine unless the alternative is lethal or a worse board collapse.

- Shift combat posture by archetype. Against aggro, block early, value life gain from Scavenging Ooze, and use Voracious Hydra as removal before payoff; against control, avoid overextending into sweepers and pressure with Lair of the Hydra plus resilient threats; against combo, attack faster and spend interaction on mana, enablers, or named engine permanents rather than defensive creatures; against midrange, preserve larger bodies and force the opponent to answer repeated Nykthos, Shrine to Nyx payoffs.

## Selection And Tutor Rules

- Treat this deck as pseudo-selection rather than a true tutor deck. Cavalier of Thorns and any rules-engine-visible text from Ba Sing Se, Badgermole Cub, Scrapshooter, Spider Manifestation, or Meltstrider's Resolve may improve card access, but do not assume exact card text unless Veles exposes the legal choice; Card text check required for those uncertain selection effects.

- Use Cavalier of Thorns land selection to complete the current engine, not to collect generic lands. Prioritize Nykthos, Shrine to Nyx when devotion is already high or one turn from high, Castle Garenbrig when a large creature spell is the bottleneck, Lair of the Hydra when a resilient threat or blocker matters, Boseiju, Who Endures when an opposing artifact, enchantment, or land is likely to require an answer, then Forest when untapped green mana or basic land count is the only issue.

- Delay the land drop when a current spell or ability can reveal, mill, or select a land before the main land play. If Cavalier of Thorns or a visible Ba Sing Se-style action may find Nykthos, Shrine to Nyx, Castle Garenbrig, Boseiju, Who Endures, or Lair of the Hydra, hold the land drop until after that selection unless an immediate precombat land is required to cast the selection spell.

- Play the land first when the visible legal action depends on immediate mana. Make Forest before Llanowar Elves, Elvish Mystic, Scavenging Ooze, Scrapshooter, Kiora, Behemoth Beckoner, or Polukranos Reborn if waiting would lose the spell; make Nykthos, Shrine to Nyx or Castle Garenbrig before a payoff turn when the extra mana is needed now and no selection effect can improve the land choice.

- Bottom or decline low-impact selection hits when the current problem is mana, pressure, or interaction. Prefer land and devotion bodies in opening turns, Kiora, Behemoth Beckoner plus high-power creatures in setup turns, Voracious Hydra or Boseiju, Who Endures against visible permanents that must die, and Cityscape Leveler or Ugin, the Spirit Dragon only when the mana engine can realistically cast them.

- Preserve graveyard information before Scavenging Ooze activations. If Cavalier of Thorns, Spider Manifestation, or another visible action cares about the graveyard, do not exile your own relevant cards casually; use Scavenging Ooze first on opponent cards that enable visible recursion, graveyard casting, or lethal graveyard scaling.

- Use Kiora, Behemoth Beckoner as selection by velocity, not as a blind planeswalker. Sequence large creatures and Voracious Hydra turns to trigger any visible Kiora draw when legal, and use Kiora untap choices on Nykthos, Shrine to Nyx, Castle Garenbrig, a mana creature, or a large creature only when the engine output or blocker reset matters this turn.

## Priority And Stack Rules

- Pass priority by default when the stack is harmless and no instant-speed legal action improves the board. This deck wants mana development and sorcery-speed payoff turns, so do not spend Boseiju, Who Endures, Scavenging Ooze activations, Lair of the Hydra animation, or uncertain card-text actions just because priority is offered.

- Respond with Boseiju, Who Endures only to a visible permanent or land that changes the game now. Use it against artifacts, enchantments, or lands that stop Nykthos, Shrine to Nyx, shut off graveyard plans, lock combat, enable a combo, or threaten immediate lethal; do not channel it into a minor permanent if playing it as a land would unlock Kiora, Behemoth Beckoner, Cavalier of Thorns, Voracious Hydra, Cityscape Leveler, or Ugin, the Spirit Dragon.

- Activate Scavenging Ooze at the last safe window before the graveyard card matters. Exile a visible target before the opponent can cast, reanimate, escape, recur, or otherwise use it; activate before combat damage only when the counter or life gain changes survival, trades, lethal math, or planeswalker protection.

- Let removal resolve on expendable accelerants when the payoff is already secured. Llanowar Elves and Elvish Mystic are worth protecting only if Veles exposes a legal protective action and losing them prevents the next key spell; preserve scarce resources for Nykthos, Shrine to Nyx payoff turns, Kiora, Behemoth Beckoner, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, or a decisive Voracious Hydra.

- Commit big stack actions only when waiting is worse or the opponent is constrained. Cast Ugin, the Spirit Dragon, Cityscape Leveler, very large Voracious Hydra, or a large Lair of the Hydra attack after checking visible open mana, known revealed cards, board pressure, and whether a smaller devotion play would bait interaction first.

- Use optional payments and triggers only when the legal text advances the current plan. For Meltstrider's Resolve, Spider Manifestation, Badgermole Cub, Scrapshooter, Ba Sing Se, and any optional trigger or payment with uncertain text, Card text check required; accept the option only when Veles action text clearly produces mana, cards, removal, protection, bodies, or lethal pressure relevant to the current visible state.

- Keep combat-trick windows deliberate. After attackers, after blockers, and before damage, spend instant-speed actions only if they create lethal, prevent lethal, save Kiora, Behemoth Beckoner, win a combat that matters, remove a key blocker, grow Scavenging Ooze for exact math, or stop an opposing graveyard/stack line.

- Use Lair of the Hydra at priority windows as a threat, blocker, or planeswalker answer, not as decoration. Animate only when the land survives expected combat or removal risk well enough, and avoid exposing it if losing the land strands Cityscape Leveler, Ugin, the Spirit Dragon, Cavalier of Thorns, or a large Voracious Hydra.

## Sideboard Map

- Role cards are narrow upgrades, not a new deck plan. Keep the Nykthos, Shrine to Nyx devotion engine intact unless the opponent makes a main-deck package actively low impact; sideboarding should add disruption while preserving Llanowar Elves, Elvish Mystic, green devotion bodies, Kiora, Behemoth Beckoner pressure turns, and large Voracious Hydra or permanent-based finishers.

- Shifting Ceratops is the anti-blue and anti-permission threat. Add it against blue control, blue tempo, flash shells, and removal-light decks where an uncounterable body pressures planeswalkers or life totals; it is weaker against creature swarms, sacrifice decks, go-wide aggro, and removal piles that answer creatures without counterspells. Its role changes from payoff to stabilizer when the opponent attacks through the air or pressures Kiora, Behemoth Beckoner, because haste/reach-style legal modes may matter if Veles exposes them; Card text check required for exact mode text at runtime.

- Sorcerous Spyglass is the named-permanent safety valve. Add it against planeswalker decks, activated-ability engines, creature-combo shells, land-centric engines, and decks with a small number of visible or strongly inferred activated threats; it is weak against pure creature combat, low-activation aggro, and broad spell-combo decks where naming one object does not slow the opponent. Use public information first, including revealed hand, battlefield, companion-style public deck cues, and previously logged game actions; do not invent hidden names.

- The Stone Brain is the proactive combo and single-card engine answer. Add it when the opposing deck is structurally dependent on one payoff, one recursion card, one sweeper, one planeswalker, or one combo piece; it is weak against redundant aggro, midrange piles with interchangeable threats, and games where spending mana without adding devotion or board presence lets the opponent race. Treat it as a commitment gate: cast it when the name is known from public information, matchup registration, or a revealed card, and delay when the name would be a guess that ignores a pressing board.

- Soul-Guide Lantern is the low-cost graveyard interaction package. Add it against recursion, reanimation, delve, escape, graveyard combo, sacrifice loops, and decks where exiling a graveyard protects a future Cityscape Leveler, Ugin, the Spirit Dragon, or large creature attack from being undone; it is weak against decks with no graveyard dependency and against matchups where spending a card on a cantrip artifact delays devotion. Its role changes from lock piece to tactical answer when Scavenging Ooze is already present: use Soul-Guide Lantern to cover broad graveyard timing while Scavenging Ooze handles single-card windows and life-total stabilization.

- The sideboard Scavenging Ooze is the extra graveyard body. Add it against graveyard decks, sacrifice decks, creature-heavy aggro where life gain and counters matter, and midrange mirrors where graveyards accumulate value; it is weaker against exile-heavy control, spell-combo, and decks with few creatures. Preserve it as a creature for devotion and combat when graveyard targets are not urgent, but activate at the last safe window before an opposing graveyard card matters.

- Damping Sphere is the anti-storm, anti-big-mana, and anti-multi-spell brake. Add it against spell-chain combo, artifact or cheap-spell decks, Lotus-style mana engines, and opposing big-mana strategies where slowing multiple spells matters more than maximizing your own Nykthos, Shrine to Nyx turn; it is bad when your own plan needs a large Nykthos, Shrine to Nyx burst immediately or when the opponent wins through normal creature combat. Its role is defensive tempo, so prioritize it only when it buys enough time for Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Voracious Hydra, Cityscape Leveler, or Ugin, the Spirit Dragon to dominate.

Anti-blue control or blue tempo
Side in: 4 Shifting Ceratops; 2 Sorcerous Spyglass
Cut: 2 Scavenging Ooze; 4 Scrapshooter

- Plan logic: Shifting Ceratops gives the deck a threat that can pressure through permission, while Sorcerous Spyglass handles planeswalkers, creature lands, or repeated activated abilities shown by public information. Keep Nykthos, Shrine to Nyx, Kiora, Behemoth Beckoner, Cavalier of Thorns, Cityscape Leveler, and Ugin, the Spirit Dragon because they create must-answer top-end. Reduce main-deck emphasis: graveyard-only value and uncertain artifact/enchantment interaction unless the opponent revealed targets for Scrapshooter; Card text check required for Scrapshooter before lowering its priority against artifact or enchantment control.

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

- Plan logic: Soul-Guide Lantern and Scavenging Ooze interact before the opponent converts graveyard setup into a board, while The Stone Brain can remove the central payoff when public information identifies it. Keep enough pressure to end the game after disruption; do not become a pure hate deck that lets the opponent rebuild. Add role cards: graveyard exile, named-card extraction, and life-buffering creature interaction. Reduce main-deck emphasis: slow colorless finishers when the matchup is decided before eight-mana plays resolve.

Spell combo or opposing big-mana
Side in: 3 Damping Sphere; 2 The Stone Brain; 2 Sorcerous Spyglass
Cut: 2 Scavenging Ooze; 4 Scrapshooter; 1 Voracious Hydra

- Plan logic: Damping Sphere taxes the opponent’s explosive turn, The Stone Brain attacks the named payoff, and Sorcerous Spyglass covers activated engines or planeswalkers visible from public information. Keep accelerants because casting disruption and pressure in the same early turns is the reason this plan works. Reduce main-deck emphasis: creature-fight removal and battlefield-only interaction when the opponent’s key turn is spell density, a land engine, or a named noncreature payoff.

Creature aggro and battlefield pressure
Side in: 1 Scavenging Ooze; 4 Shifting Ceratops
Cut: 1 Ugin, the Spirit Dragon; 1 Cityscape Leveler; 3 Spider Manifestation

- Plan logic: Scavenging Ooze improves racing and stabilizing when creatures die, and Shifting Ceratops adds large bodies that can block, attack planeswalkers, or close after stabilization. Keep Voracious Hydra, Polukranos Reborn, Old-Growth Troll, Cavalier of Thorns, and Lair of the Hydra because they decide creature boards. Add role cards: extra bodies, life gain, and pressure that does not require a long setup. Reduce main-deck emphasis: slow or uncertain setup cards when the board state demands immediate power and toughness; Card text check required for Spider Manifestation before deprioritizing it if Veles exposes token-making or stabilizing text.

Artifacts, enchantments, or activated-permanent engines
Side in: 2 Sorcerous Spyglass; 1 Scavenging Ooze
Cut: 1 Ugin, the Spirit Dragon; 2 Spider Manifestation

- Plan logic: Sorcerous Spyglass handles repeatable activated abilities that Boseiju, Who Endures or Voracious Hydra may not answer cleanly, while the extra Scavenging Ooze keeps pressure attached to interaction. Keep Scrapshooter if Veles confirms it answers artifacts, enchantments, fliers, or other relevant permanents; Card text check required. Add role cards: named activated-ability suppression, incidental graveyard pressure, and permanent interaction. Reduce main-deck emphasis: slow setup cards only when the opponent’s engine is already visible and must be interrupted early.

- Archetype rule: favor minimal changes against fair midrange. Add Shifting Ceratops only when blue permission or planeswalkers matter, add Scavenging Ooze when graveyards and creature trades matter, and add Sorcerous Spyglass only when a repeatable activated threat is visible or strongly supported by public deck information.

- Archetype rule: do not overload on Damping Sphere when your own Nykthos, Shrine to Nyx turn is the clearest win condition and the opponent is not meaningfully constrained by spell taxes. If Damping Sphere is present, sequence it after enough early development when possible, so the tax buys time without stranding your own high-impact plays.

- Archetype rule: use The Stone Brain only with a real name source. A revealed hand, previous game log, public deck registration, or battlefield clue can justify the name; a generic fear of combo is not enough when the current hand needs devotion, mana, or removal to survive.

- Archetype rule: keep sideboard artifacts tactically purposeful. Soul-Guide Lantern, Sorcerous Spyglass, The Stone Brain, and Damping Sphere add little devotion, so each one must either stop a known opposing axis or buy a specific turn for Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Voracious Hydra, Cavalier of Thorns, Cityscape Leveler, or Ugin, the Spirit Dragon.

## Matchup Guidance

- Aggro: stabilize before maximizing mana. Keep hands that produce a turn-one Llanowar Elves or Elvish Mystic, a turn-two body, or a fast Voracious Hydra, because the matchup is decided by whether Nykthos Ramp reaches a board where Old-Growth Troll, Polukranos Reborn, Badgermole Cub, Scrapshooter, or Cavalier of Thorns can block without losing tempo. Add role cards: Scavenging Ooze and Shifting Ceratops when extra life, size, and immediate board presence matter. Reduce main-deck emphasis: slow eight-mana finishers and uncertain setup cards when legal actions show creature pressure already on board. Card text check required for Badgermole Cub, Scrapshooter, Spider Manifestation, and Meltstrider's Resolve; use their tactical role only when Veles exposes relevant text or legal action labels.

- Control: pressure from multiple angles and force answers before committing the most expensive threat. Lead with resilient devotion sources such as Old-Growth Troll, Polukranos Reborn, and creature lands when the hand supports it, then use Kiora, Behemoth Beckoner, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, or Lair of the Hydra after the opponent has spent interaction or tapped mana. Add role cards: Shifting Ceratops for blue-heavy permission, Sorcerous Spyglass for visible planeswalkers or activated lands, and The Stone Brain only when a public source identifies the card that decides the matchup. Reduce main-deck emphasis: Scavenging Ooze when graveyards are irrelevant and Scrapshooter when no artifact, enchantment, or flying target is confirmed.

- Combo: decide whether the hand races, disrupts, or mulligans. Keep fast Nykthos, Shrine to Nyx hands only when they produce a meaningful clock or a high-impact permanent before the opponent's expected key turn; otherwise prioritize Damping Sphere, The Stone Brain, Sorcerous Spyglass, Boseiju, Who Endures, and pressure. Name with The Stone Brain only from public information, revealed cards, previous-game knowledge, or a known registered list. Add role cards: Damping Sphere against spell-chain or big-mana combo, The Stone Brain against single-payoff combo, and Sorcerous Spyglass against activated engines. Reduce main-deck emphasis: Voracious Hydra and battlefield-only removal when the opponent is not winning through creatures.

- Tempo: make land drops, avoid fragile all-in turns, and punish shields-down windows. Turn-one Llanowar Elves or Elvish Mystic is strong, but do not assume it survives; hands with Forest, Castle Garenbrig, Nykthos, Shrine to Nyx, or Lair of the Hydra plus multiple castable threats are better than hands that collapse to one removal spell. Shifting Ceratops is a priority role card against blue tempo because it pressures through permission and blocks many creature boards. Use Voracious Hydra as removal only when the target matters immediately or when leaving it alive lets the opponent protect a clock; otherwise use Hydra as a large devotion-scaled threat.

- Midrange: overload removal with sticky permanents and convert mana into repeatable threat quality. Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Lair of the Hydra, Voracious Hydra, and Ugin, the Spirit Dragon are the cards that turn topdecks into pressure, while Scavenging Ooze can dominate graveyards after trades. Add role cards: Scavenging Ooze when both sides trade creatures, Shifting Ceratops when the opponent has blue blockers or planeswalkers, and Sorcerous Spyglass when a specific activated permanent is visible. Reduce main-deck emphasis: Damping Sphere unless the opponent also uses burst mana or multi-spell turns.

- Big mana: become the disruptive beatdown unless your own Nykthos, Shrine to Nyx draw is clearly faster. Damping Sphere is strongest when it slows the opponent more than it slows your own decisive turn; sequence early devotion first if legal actions allow a meaningful threat before the Sphere tax matters. The Stone Brain should target a public, matchup-defining payoff, not a guessed card. Sorcerous Spyglass can cover visible activated lands, planeswalkers, or engine permanents. Keep pressure high with Old-Growth Troll, Polukranos Reborn, Shifting Ceratops, Lair of the Hydra, Cavalier of Thorns, Cityscape Leveler, and Ugin, the Spirit Dragon.

- Graveyard decks: interact before the graveyard becomes a converted resource. Scavenging Ooze is both hate and life buffer, but activate it at the latest safe point when holding mana matters for other legal actions. Soul-Guide Lantern is the cleanest role card when the opponent can reload faster than Scavenging Ooze can exile individual cards. The Stone Brain is appropriate when public information identifies a reanimation payoff, recursive engine, or single card that invalidates normal combat. Reduce main-deck emphasis: slow finishers only when survival depends on early graveyard containment.

- Artifact or enchantment decks: preserve flexible answers until the engine piece matters. Boseiju, Who Endures should answer a permanent that is actively constraining mana, combat, or the win condition, not the first legal target by default. Scrapshooter may be important here, but Card text check required; if Veles exposes artifact, enchantment, flying, or permanent-interaction text, raise it sharply. Sorcerous Spyglass handles visible activated abilities that removal cannot efficiently answer. Cityscape Leveler and Ugin, the Spirit Dragon are late-game reset tools when the game reaches enough mana.

- Go-wide decks: value sweep-like pressure, large blockers, and life stabilization over pure ramp. Voracious Hydra should remove the creature that changes attacks, blocks, or lethal math when legal action text confirms fight or damage behavior; otherwise make the body large enough to halt combat. Polukranos Reborn, Old-Growth Troll, Badgermole Cub, Scrapshooter, Spider Manifestation, and Cavalier of Thorns may all matter as board-stabilizing bodies, but Card text check required for the less familiar cards before relying on token, reach, or special blocking roles. Add role cards: Scavenging Ooze and Shifting Ceratops when bodies and life matter.

- Single-threat decks: answer the one permanent that matters and avoid spending Voracious Hydra too small. Boseiju, Who Endures should be held for a visible noncreature permanent that enables the threat or prevents normal combat. Voracious Hydra should scale to kill or dominate the threat when legal actions permit. Sorcerous Spyglass is strong when the single threat is an activated permanent or planeswalker. Lair of the Hydra lets the deck pressure while holding mana for Scavenging Ooze, Boseiju, Who Endures, or other exposed instant-speed choices.

- Burn: treat life total as a resource with a hard floor, not a cushion. Mulligan slow hands that do nothing before turn three unless they contain Scavenging Ooze, a fast creature, or a legal sequence into large blockers. Add role cards: Scavenging Ooze and Shifting Ceratops when they gain life, block, or shorten the race. Avoid unnecessary Lair of the Hydra activations that expose a land to removal if the same mana can cast a stabilizing creature. Use Voracious Hydra to remove repeatable damage sources before spending it as a finisher.

- Removal-heavy decks: diversify threat types and sequence so no single answer breaks the hand. Do not commit every mana creature and devotion permanent into a visible sweeper turn when a land-based plan with Castle Garenbrig, Nykthos, Shrine to Nyx, and Lair of the Hydra can continue. Old-Growth Troll, Cavalier of Thorns, Lair of the Hydra, Cityscape Leveler, Ugin, the Spirit Dragon, and Shifting Ceratops are the pressure cards that make one-for-one removal inefficient. Kiora, Behemoth Beckoner is valuable when it draws from large creatures or untaps a meaningful mana source; Card text check required for any nonstandard interaction with newer permanents.

## Specific Matchup Notes

- General/archetype-only notes: revealed cards, public deck information, and Veles legal actions override every matchup assumption here. Treat unknown opponents as creature pressure until shown otherwise, because Nykthos Ramp needs time to convert Llanowar Elves, Elvish Mystic, Old-Growth Troll, Badgermole Cub, Kiora, Behemoth Beckoner, Nykthos, Shrine to Nyx, Castle Garenbrig, and Ba Sing Se into decisive mana.

- Versus fast creature decks: stabilize before maximizing devotion. Keep hands with early Forest plus Llanowar Elves or Elvish Mystic only if the next legal plays still function after removal; prioritize Voracious Hydra as interaction when it can remove the creature that changes lethal or attack math. Add role cards: Shifting Ceratops and Scavenging Ooze when bodies, life buffer, or race compression matter. Reduce main-deck emphasis: the slowest top-end line when the visible board demands blockers first.

- Versus blue tempo or permission: force threats through windows instead of walking every payoff into open mana. Shifting Ceratops is the sideboard pressure card, Lair of the Hydra pressures from land slots, and Castle Garenbrig or Nykthos, Shrine to Nyx can overload a single answer if devotion is already present. Add role cards: Shifting Ceratops and Sorcerous Spyglass when a visible activated permanent is part of the opponent's plan. Reduce main-deck emphasis: fragile all-in Ugin, the Spirit Dragon or Cityscape Leveler turns when the opponent can punish a tap-out.

- Versus midrange removal: diversify threats and preserve land-based pressure. Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Voracious Hydra, Lair of the Hydra, Cityscape Leveler, and Ugin, the Spirit Dragon make one-for-one removal awkward; avoid committing every devotion permanent into a public sweeper pattern. Add role cards: Scavenging Ooze for graveyard pressure after trades, Shifting Ceratops for blue midrange, and Sorcerous Spyglass for known activated engines.

- Versus graveyard strategies: move graveyard containment ahead of extra mana unless the ramp line wins immediately. Scavenging Ooze should exile the card that creates the next visible payoff, while Soul-Guide Lantern is the broad sideboard role card when one-for-one exile cannot keep pace. Add role cards: Soul-Guide Lantern, Scavenging Ooze, and The Stone Brain only when public information identifies a single graveyard payoff or recursive engine.

- Versus combo or big mana: become the pressure deck while selecting disruption from public information. Damping Sphere is correct only when its tax harms the opponent more than the current Nykthos, Shrine to Nyx and Castle Garenbrig plan; The Stone Brain should name only a revealed, known, or registered payoff, not a guess. Add role cards: Damping Sphere, The Stone Brain, Sorcerous Spyglass, and Shifting Ceratops. Reduce main-deck emphasis: small creature removal modes from Voracious Hydra when creatures are not the route to victory.

- Versus artifact or enchantment engines: save flexible answers for permanents that change the game state. Boseiju, Who Endures should answer the visible engine, lock piece, or mana permanent that blocks the current plan; Scrapshooter may be central, but Card text check required before relying on exact artifact, enchantment, flying, or reach text. Add role cards: Sorcerous Spyglass for visible activated abilities and The Stone Brain for a known single-card engine.

- Versus control: commit threats in layers, not all at once. Kiora, Behemoth Beckoner is stronger when it converts a large creature into cards or untaps a meaningful mana permanent, but Card text check required for exact draw and untap conditions. Shifting Ceratops and Lair of the Hydra pressure planeswalkers and life totals without asking the same question as Ugin, the Spirit Dragon or Cityscape Leveler.

## Risk Summary

- Mana risk: hands with Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, or Ba Sing Se can look powerful while lacking early green sequencing. Prioritize castable Forest-based starts, and do not assume Llanowar Elves or Elvish Mystic survives when the hand has no backup land development.

- Matchup risk: Damping Sphere can slow this deck's own burst-mana turns. Use it only when visible opponent incentives, matchup knowledge, or prior-game evidence show the tax is worth weakening Nykthos, Shrine to Nyx lines.

- Draw risk: top-heavy hands can strand Cityscape Leveler, Ugin, the Spirit Dragon, Cavalier of Thorns, or oversized Voracious Hydra. Mulligan hands that do not produce a relevant play before turn three unless the matchup is slow and the lands already support the expensive plan.

- Over-sideboarding risk: too many role cards can dilute devotion, creature count, and closing speed. Add Soul-Guide Lantern, Damping Sphere, Sorcerous Spyglass, The Stone Brain, Shifting Ceratops, or the sideboard Scavenging Ooze for a visible job, then preserve enough main-deck pressure to end the game.

- Graveyard risk: Scavenging Ooze is strong but mana-hungry. Do not spend green mana on low-impact exile if the same turn requires Voracious Hydra, Polukranos Reborn, Boseiju, Who Endures, Lair of the Hydra, or a decisive ramp payoff.

- Sweeper/removal risk: devotion collapses when too many permanents are exposed at once. Keep land-based threats and follow-up top-end available when the opponent's public actions suggest mass removal or repeated one-for-one answers.

- Closer risk: ramp without a payoff gives the opponent time to recover. Convert large mana into Voracious Hydra, Cavalier of Thorns, Cityscape Leveler, Ugin, the Spirit Dragon, Lair of the Hydra, or confirmed Spider Manifestation/Meltstrider's Resolve lines only after Card text check required for unfamiliar effects.

- Interaction risk: Boseiju, Who Endures and Voracious Hydra are finite answers. Spend them on permanents or creatures that change lethal, mana denial, combo execution, or planeswalker pressure, not on the first legal target.

- Sequencing risk: Kiora, Behemoth Beckoner and Ba Sing Se may create powerful turns, but Card text check required. When text is uncertain, prefer legal lines that are still acceptable if the card is only a mana or value permanent rather than relying on unverified synergy.

## Test Feedback Checklist

- Deciding factor: record whether the game was decided by early acceleration, devotion burst, a single large payoff, land-based pressure, graveyard interaction, sideboard hate, or failure to convert mana into pressure.

- Mulligans: note whether kept hands had Forest plus Llanowar Elves or Elvish Mystic, a castable two- or three-mana follow-up, and a realistic payoff; flag hands kept only because Nykthos, Shrine to Nyx or Castle Garenbrig looked powerful without enough green development.

- Mana: track turns where Nykthos, Shrine to Nyx, Castle Garenbrig, Lair of the Hydra, Boseiju, Who Endures, Ba Sing Se, or too many non-Forest lands delayed the first relevant spell. Record whether mana creatures died and whether the hand still functioned afterward.

- Velocity: ask whether the deck spent turns building toward a decisive play or merely adding small resources while the opponent advanced. Flag games where Badgermole Cub, Meltstrider's Resolve, Spider Manifestation, or Scrapshooter were drawn but their exact text was not verified; Card text check required before using those games as synergy proof.

- Engines: record whether Kiora, Behemoth Beckoner, Nykthos, Shrine to Nyx, Old-Growth Troll, Cavalier of Thorns, and Ba Sing Se produced actual mana or card advantage, or whether they were win-more after the board was already stable.

- Removal: review each Voracious Hydra, Boseiju, Who Endures, Scavenging Ooze activation, Scrapshooter use, Cityscape Leveler trigger, and Ugin, the Spirit Dragon activation for target quality. Mark whether the answer changed lethal math, stopped an engine, protected a planeswalker, or was spent on a low-impact permanent.

- Sideboard: after sideboarded games, record which of Shifting Ceratops, Sorcerous Spyglass, The Stone Brain, Soul-Guide Lantern, Damping Sphere, and the sideboard Scavenging Ooze affected the game before the result was already determined.

- Closing: identify whether wins ended through oversized Voracious Hydra, Lair of the Hydra, Ugin, the Spirit Dragon, Cityscape Leveler, Cavalier of Thorns pressure, Polukranos Reborn pressure, Shifting Ceratops, or a confirmed Spider Manifestation/Meltstrider's Resolve line.

- Role: ask whether the pilot correctly became the control deck against fast creatures, the pressure deck against combo or big mana, and the layered-threat deck against control and midrange.

- Mistakes: flag missed land drops, unnecessary exposure to sweepers, overuse of Scavenging Ooze mana, premature Damping Sphere deployment, tap-out turns into visible interaction, and attacks that reduced devotion or blocker count without advancing the race.

- Stranded cards: count games where Cityscape Leveler, Ugin, the Spirit Dragon, Cavalier of Thorns, large Voracious Hydra, The Stone Brain, Damping Sphere, Soul-Guide Lantern, or Sorcerous Spyglass sat unused because the matchup, mana, or board state made them too slow or too narrow.

- Overperformers and underperformers: record cards that repeatedly changed the game state on curve, and separately record cards that looked powerful but did not affect lethal, card flow, mana, or opposing engines.

## First Tuning Questions

- Card quantities: are two Llanowar Elves and two Elvish Mystic enough for the ramp starts the deck needs, or do losses show too many hands beginning on turn two without acceleration?

- Mana base: does the mix of 12 Forest, 2 Nykthos, Shrine to Nyx, 2 Castle Garenbrig, 3 Lair of the Hydra, 2 Boseiju, Who Endures, and 3 Ba Sing Se create enough untapped green starts, or are utility lands reducing early consistency?

- Devotion density: do Old-Growth Troll, Polukranos Reborn, Cavalier of Thorns, Badgermole Cub, Scrapshooter, and Kiora, Behemoth Beckoner reliably make Nykthos, Shrine to Nyx explosive, or is the deck drawing mana without durable board presence?

- Aggro plan: is Voracious Hydra plus Scavenging Ooze enough stabilization against fast creature decks, or does the deck need more early bodies, lifegain, or cheaper interaction in the main deck or sideboard?

- Control plan: are Shifting Ceratops, Lair of the Hydra, Castle Garenbrig, and layered top-end enough against permission and sweepers, or are too many wins depending on resolving Ugin, the Spirit Dragon or Cityscape Leveler?

- Closer mix: should the deck emphasize one-card closers like Ugin, the Spirit Dragon and Cityscape Leveler, scalable threats like Voracious Hydra and Lair of the Hydra, or text-verified engine closers involving Spider Manifestation and Meltstrider's Resolve?

- Graveyard package: is main-deck Scavenging Ooze plus sideboard Soul-Guide Lantern and the extra Scavenging Ooze sufficient, or are graveyard matchups still winning before those cards matter?

- Hate slots: does Damping Sphere disrupt opposing combo and big mana more than it disrupts this deck's own Nykthos, Shrine to Nyx and Castle Garenbrig turns?

- Naming effects: does The Stone Brain have enough matchups where public information identifies a decisive card, or is it too often stranded because the pilot cannot legally infer hidden contents?

- Activated-ability hate: does Sorcerous Spyglass hit visible engines often enough, or should those sideboard slots become broader interaction if it frequently lacks a high-impact legal name?

- Role conflicts: are Scrapshooter, Meltstrider's Resolve, Spider Manifestation, and Badgermole Cub pulling the deck toward a different engine than the devotion-ramp plan; Card text check required before changing quantities based on assumed synergy.

## Veles Tactical Policy

### Policy: Mulligan Acceleration Gate
Priority: High
Decision families: mulligan
Cards: Forest; Llanowar Elves; Elvish Mystic; Nykthos, Shrine to Nyx; Castle Garenbrig; Voracious Hydra; Kiora, Behemoth Beckoner
Phase windows: pregame
Runtime cues: prompt:mulligan; action:keep; action:mulligan
Use when: opening hand is visible and the engine asks keep or mulligan.
Avoid when: hand has no early green source, no castable accelerator or two-drop, and no stable path to a payoff.
Instructions: Keep hands with Forest plus Llanowar Elves or Elvish Mystic and a castable follow-up; keep slower hands only when lands, curve, and payoff are all present. Do not keep a hand because Nykthos, Shrine to Nyx or Castle Garenbrig is powerful if the hand cannot build green devotion first.
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; main phase two
Runtime cues: action:cast Llanowar Elves; action:cast Elvish Mystic
Use when: a mana creature is legal and the board does not require immediate survival interaction.
Avoid when: casting it prevents a legal removal or blocker line needed against visible lethal pressure.
Instructions: Cast the first legal mana creature before speculative setup pieces because this deck needs early green development for Nykthos, Shrine to Nyx, Castle Garenbrig, and large payoff turns.
Pilot skill floor: low
No-API allowed: no
Light-model allowed: yes

### Policy: Forest Before Utility Lands
Priority: Medium
Decision families: mana
Cards: Forest; Nykthos, Shrine to Nyx; Castle Garenbrig; Lair of the Hydra; Boseiju, Who Endures; Ba Sing Se
Phase windows: land play decision; early main phases
Runtime cues: action:play Forest; action:play Nykthos, Shrine to Nyx; action:play Castle Garenbrig; action:play Lair of the Hydra; action:play Boseiju, Who Endures; action:play Ba Sing Se
Use when: multiple land plays are legal in the first three turns.
Avoid when: a utility land is the only legal land that enables the current turn spell.
Instructions: Prefer Forest when it enables Llanowar Elves, Elvish Mystic, Scavenging Ooze, Voracious Hydra, or a two-green curve. Treat Ba Sing Se text as conditional until verified; Card text check required.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Nykthos Commitment Gate
Priority: High
Decision families: mana; priority
Cards: Nykthos, Shrine to Nyx; Old-Growth Troll; Polukranos Reborn; Cavalier of Thorns; Kiora, Behemoth Beckoner; Voracious Hydra; Ugin, the Spirit Dragon; Cityscape Leveler
Phase windows: main phases; mana payment prompts
Runtime cues: action:activate Nykthos, Shrine to Nyx; prompt:pay mana
Use when: activating Nykthos, Shrine to Nyx can convert visible devotion into a decisive spell, planeswalker, creature, or activated Lair of the Hydra attack.
Avoid when: activation spends the turn into visible disruption without improving board, survival, or clock.
Instructions: Treat Nykthos turns as commitment points; compare payoff, remaining mana, exposed board, and opponent pressure before spending the burst.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Castle Garenbrig Creature Payment
Priority: Medium
Decision families: mana
Cards: Castle Garenbrig; Voracious Hydra; Cavalier of Thorns; Cityscape Leveler; Polukranos Reborn; Old-Growth Troll
Phase windows: main phases; mana payment prompts
Runtime cues: action:activate Castle Garenbrig; prompt:pay mana
Use when: Castle Garenbrig mana is legal for the creature being cast or activated.
Avoid when: the pending spell or ability cannot legally use Castle Garenbrig mana.
Instructions: Use Castle Garenbrig for large creature turns before consuming flexible Forest or mana-creature sources, while preserving exact colored requirements shown by Forge.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Deterministic Mana Activation Follow-Through
Priority: Low
Decision families: mana
Cards: Llanowar Elves; Elvish Mystic
Phase windows: mana payment prompts
Runtime cues: action:activate Llanowar Elves; action:activate Elvish Mystic
Use when: Forge is asking for mana, the source is untapped, and the pending payment can use green mana.
Avoid when: activating the source is not legal or the pending payment cannot use green mana.
Instructions: Select the legal mana ability that produces green for the pending payment; rely on Forge for legality and stale-action rejection.
Pilot skill floor: low
No-API allowed: yes
Light-model allowed: yes

### Policy: Big Payoff Tap-Out Gate
Priority: High
Decision families: priority; interaction
Cards: Ugin, the Spirit Dragon; Cityscape Leveler; Cavalier of Thorns; Voracious Hydra; Lair of the Hydra
Phase windows: main phases; combat setup
Runtime cues: action:cast Ugin, the Spirit Dragon; action:cast Cityscape Leveler; action:cast Cavalier of Thorns; action:activate Lair of the Hydra
Use when: a high-cost payoff is legal and the turn can materially change battlefield control, clock, or opponent engine access.
Avoid when: visible pressure requires cheaper stabilization first or the payoff leaves no answer to a known lethal attack.
Instructions: Spend big mana on the payoff that changes the current visible problem, not simply the most expensive legal action.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Voracious Hydra Removal Mode
Priority: High
Decision families: interaction; selection; combat
Cards: Voracious Hydra
Phase windows: main phases; fight/counter choice prompts; precombat
Runtime cues: action:cast Voracious Hydra; prompt:Voracious Hydra
Use when: a visible creature threatens lethal, blocks the primary attack, enables opponent combo, or must die before combat.
Avoid when: no visible creature target changes combat, engine function, or survival.
Instructions: Use Voracious Hydra as interaction when the target matters immediately; otherwise build a large threat that increases devotion and clock.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Boseiju Utility Answer Gate
Priority: Medium
Decision families: interaction; mana
Cards: Boseiju, Who Endures
Phase windows: opponent end step; main phases; stack response windows
Runtime cues: action:channel Boseiju, Who Endures; action:activate Boseiju, Who Endures
Use when: a visible artifact, enchantment, or land is central to opponent mana, combo, lockdown, or lethal pressure.
Avoid when: spending Boseiju, Who Endures cuts this deck off a needed land drop without answering a decisive permanent.
Instructions: Treat Boseiju, Who Endures as both land and answer; preserve it when mana is short, spend it when the target is more important than the land.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Graveyard Interaction Gate
Priority: Medium
Decision families: interaction; priority
Cards: Scavenging Ooze; Soul-Guide Lantern
Phase windows: opponent graveyard setup; response windows; main phases
Runtime cues: action:activate Scavenging Ooze; action:cast Soul-Guide Lantern; action:activate Soul-Guide Lantern
Use when: a visible graveyard card or graveyard count enables recursion, escape-like pressure, reanimation, or lethal next-turn resource flow.
Avoid when: green mana is needed for a board-stabilizing spell this turn and the graveyard action does not affect visible timing.
Instructions: Use targeted Scavenging Ooze activations for immediate graveyard threats; use Soul-Guide Lantern when the matchup requires broad graveyard denial.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Scrapshooter Text-Checked Use
Priority: Medium
Decision families: interaction; selection
Cards: Scrapshooter
Phase windows: main phases; response windows shown by Forge
Runtime cues: action:cast Scrapshooter; action:activate Scrapshooter; prompt:Scrapshooter
Use when: Forge shows a legal Scrapshooter action and visible text or prompt confirms what it affects.
Avoid when: the guide would need unverified card text to rank the action.
Instructions: Card text check required. Use Scrapshooter only according to the legal prompt text and visible target class; do not assume artifact, enchantment, reach, or damage text unless Forge exposes it.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Kiora Engine Timing
Priority: Medium
Decision families: priority; selection
Cards: Kiora, Behemoth Beckoner; Old-Growth Troll; Polukranos Reborn; Cavalier of Thorns; Voracious Hydra
Phase windows: main phases; post-payoff sequencing
Runtime cues: action:cast Kiora, Behemoth Beckoner; action:activate Kiora, Behemoth Beckoner
Use when: Kiora, Behemoth Beckoner is legal and visible board or hand can use untap/card-flow text shown by Forge.
Avoid when: playing Kiora, Behemoth Beckoner exposes the turn to lethal combat or delays required interaction.
Instructions: Card text check required for exact ability use. Sequence Kiora around large creatures and mana permanents only when the engine text is confirmed by runtime prompts.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Lair Of The Hydra Closing Gate
Priority: Medium
Decision families: combat; mana
Cards: Lair of the Hydra
Phase windows: precombat main phase; declare attackers; opponent end step if activated action appears
Runtime cues: action:activate Lair of the Hydra; action:attack with Lair of the Hydra
Use when: visible mana can make Lair of the Hydra a meaningful attacker or blocker without sacrificing necessary spell interaction.
Avoid when: animation exposes a land to removal and does not change the combat clock or survival math.
Instructions: Use Lair of the Hydra as a mana sink after establishing board; do not trade it away unless the exchange protects a decisive planeswalker, prevents lethal, or ends the game.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Combat With Devotion Creatures
Priority: Medium
Decision families: combat
Cards: Old-Growth Troll; Polukranos Reborn; Cavalier of Thorns; Badgermole Cub; Scrapshooter; Scavenging Ooze; Voracious Hydra
Phase windows: declare attackers; declare blockers; combat damage assignment
Runtime cues: prompt:declare attackers; prompt:declare blockers; action:block
Use when: creatures can attack or block and devotion, blocker count, or planeswalker protection matters.
Avoid when: attacking reduces necessary defense against visible lethal or removes devotion needed for a postcombat Nykthos, Shrine to Nyx turn.
Instructions: Make attacks that improve the clock without collapsing mana development or defense; block aggressively when the opponent is faster and the creature is not needed for an immediate payoff.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Deterministic No-Block Pass
Priority: Low
Decision families: combat
Cards: none
Phase windows: declare blockers
Runtime cues: action:no blocks
Use when: Forge offers exactly one legal action containing no blocks and no creature can legally block.
Avoid when: any legal action names a blocking creature.
Instructions: Select the no-block action only when the legal action list contains no blocker assignment choices.
Pilot skill floor: low
No-API allowed: yes
Light-model allowed: yes

### Policy: Unverified Engine Cards
Priority: Low
Decision families: priority; selection
Cards: Badgermole Cub; Spider Manifestation; Meltstrider's Resolve; Ba Sing Se
Phase windows: main phases; prompted selections
Runtime cues: action:cast Badgermole Cub; action:cast Spider Manifestation; action:cast Meltstrider's Resolve; prompt:Ba Sing Se
Use when: Forge exposes legal text or prompts that define the immediate effect.
Avoid when: the decision requires assumed card text not visible in the current prompt.
Instructions: Card text check required. Treat these as conditional engine pieces and follow the rules-engine prompt exactly; route target, mode, and timing judgment through the light model.
Pilot skill floor: medium
No-API allowed: no
Light-model allowed: yes

### Policy: Sideboard Hate Selection
Priority: High
Decision families: sideboard; pregame
Cards: Shifting Ceratops; Sorcerous Spyglass; Scavenging Ooze; The Stone Brain; Soul-Guide Lantern; Damping Sphere
Phase windows: sideboarding; pregame after game one and game two
Runtime cues: prompt:sideboard; action:submit sideboard
Use when: matchup identity, revealed cards, or previous-game public logs identify the opposing axis.
Avoid when: adding narrow hate weakens the core ramp plan without a visible or known matchup target.
Instructions: Bring Shifting Ceratops for blue interaction pressure, graveyard cards for graveyard engines, Damping Sphere for spell-chain or big-mana opponents, Sorcerous Spyglass for activated engines, and The Stone Brain only when a decisive card name is known from public information or matchup guide.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Damping Sphere Self-Check
Priority: Medium
Decision families: sideboard; mana
Cards: Damping Sphere; Nykthos, Shrine to Nyx; Castle Garenbrig
Phase windows: sideboarding; main phases after sideboarding
Runtime cues: action:cast Damping Sphere
Use when: opponent engine is more constrained by Damping Sphere than this deck's visible mana plan.
Avoid when: the current hand depends on Nykthos, Shrine to Nyx or Castle Garenbrig burst mana and opponent pressure is not tied to the Damping Sphere axis.
Instructions: Sideboard and cast Damping Sphere as a hate card, not as generic interaction; account for its possible cost to this deck's big-mana turns.
Pilot skill floor: high
No-API allowed: no
Light-model allowed: yes

### Policy: Exact Sideboard Submission
Priority: Low
Decision families: sideboard
Cards: none
Phase windows: sideboarding
Runtime cues: action:submit sideboard
Use when: a validated sideboard plan has already been selected and the legal action text is submit sideboard.
Avoid when: no validated plan is locked.
Instructions: Submit only the already selected legal 60-card configuration; do not modify quantities during this no-API step.
Pilot skill floor: low
No-API allowed: yes
Light-model allowed: yes
