Trap
NormalGrisaille Prison
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2860
If you control a face-up monster that was Tribute, Ritual, or Fusion Summoned: Until the end of your opponent's next turn, neither player can Synchro or Xyz Summon, Synchro and Xyz Monsters cannot attack, also their effects are negated.
Grisaille Prison — Power Evaluation
Final Score: 56 ± 8 · Confidence: Medium
- Intrinsic: 55 · Deck: 57 · Meta: provisional
- Primary role: Floodgate/Control · Secondary: Removal/Negation
Why it scores here
Grisaille Prison is a conditional trap: it needs its controller to have a face-up Tribute, Ritual, or Fusion Summoned monster, and then it shuts down Synchro and Xyz Summons for both players until the end of the opponent's next turn, negates Synchro/Xyz effects, and stops them attacking. The score comes from that broad Extra Deck lock and the cheap, one-slot cost of running it. The evidence shows no combo or guide data, so conversion and card advantage score low, and the deck-frequency numbers (400 of 400) reflect how the sample was built rather than how popular the card is, so they add little to the score.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 55 | Set trap gated by a Tribute/Ritual/Fusion summon on the controller's side, with no searcher or combo-start data supplied; partner co-occurrence is consistent but is a sample artifact (400/400 decks) (observed + inferred). |
| Combo & Conversion | 25 | No recorded boards and no examples; the card's value is a lock that ends the opponent's extra-deck plays rather than building a board (inferred from text only). |
| Resource Economy | 20 | A single one-for-zero trap with no refuel, no searches and no card advantage in the text (verified). |
| Effect & Interaction | 70 | Negates Synchro/Xyz effects and stops their attacks and Synchro/Xyz Summons for a full opponent turn, which is strong but gated by its condition (verified). |
| Material Utility | 0 | Trap card with no monster body, so it cannot be used as material (verified). |
| Resilience & Flexibility | 35 | A set trap that backrow removal or trap-negation effects can answer, and it can only be used once its condition is met (inferred). |
| Deck-Building Efficiency | 75 | One normal trap slot with no garnet or self-lock; 1 to 3 copies per deck in the sample (observed). |
Calculation
Weight profile: 0.7 Floodgate/Control + 0.3 Removal/Negation. Intrinsic ≈ 55, Deck ≈ 57, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Shuts down Synchro and Xyz Summons for both players for a full turn cycle
- Negates Synchro/Xyz effects and stops Synchro/Xyz attacks
- Cheap to run: one slot, no garnet, copies can be played freely
- Condition is a common Tribute, Ritual, or Fusion summon in the sampled decks
Weaknesses
- Conditional activation: needs a face-up Tribute, Ritual, or Fusion Summoned monster
- Symmetric lock: also restricts the controller's own Synchro/Xyz Summons
- Set trap that backrow removal can answer before it is used
- No combo, guide or ruling evidence to confirm its in-game timing
Counters / choke points
- Backrow removal of the set trap
- Trap-negation effects in the opponent's hand or field
- Decks that do not depend on Synchro or Xyz Summons are largely unaffected
Best use
Floodgate/Control trap against Extra Deck-reliant lines. Decks: Mitsurugi, Branded, Despia. Suggested copies: 1.
Evidence & gaps
- Verified: Condition: face-up Tribute, Ritual, or Fusion Summoned monster controlled by the card's user; Effect: no Synchro or Xyz Summons by either player until the end of the opponent's next turn; Synchro/Xyz effects negated; Synchro/Xyz monsters cannot attack; Formats: TCG, OCG, MasterDuel; 90 distinct archetypes in the deck sample
- Observed: Sample of 400 decks, 1.73 average copies per deck, 217 decks run one copy; Top partners: Droll & Lock Bird 89%, Called by the Grave 88%, Mulcharmy Fuwalos 84.8%, Ash Blossom & Joyous Spring 78.8%
- Inferred: Acts as a floodgate against Extra Deck-reliant lines rather than as a board builder; Its condition is commonly met in the sampled archetypes, so access is realistic but not guaranteed
- Data gaps: No combos supplied: combo conversion is text-only inference No guides supplied No banlist token; legal copies is empty, so 3 copies is assumed No usage statistics (StatisticsCard): inclusion is from the deck sample only The deck sample is matched on this card, so 400/400 running it is not a population share No rulings supplied for the timing of the Synchro/Xyz lock and negation