Trap
NormalSimultaneous Equation Cannons
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9109
Banish 1 Fusion Monster and 2 Xyz Monsters with the same Rank from your Extra Deck, whose combined Level and Ranks equal the total number of cards in both players' hands and on the field, then you can apply this effect. ● Return 2 of your banished monsters to the Extra Deck (1 Xyz and 1 Fusion) whose combined Level and Rank equal the Level or Rank of 1 face-up monster your opponent controls, then banish all cards they control.
Simultaneous Equation Cannons — Power Evaluation
Final Score: 54 ± 8 · Confidence: Medium
- Intrinsic: 53 · Deck: 55 · Meta: provisional
- Primary role: Board breaker · Secondary: Recovery/Recursion
Why it scores here
The card's strength is its effect: it can banish every card the opponent controls and then recycle banished monsters back to the Extra Deck, which is real board-breaking value. Its high usage in Labrynth lists (about 2.7 copies per deck across the 400-deck sample) confirms it is a practical, deliberately run piece, but that frequency only supports accessibility, not raw power. The activation needs a Fusion and two same-Rank Xyz in the Extra Deck plus an exact Level/Rank total matched to the hand and field count, so it is a conditional mid-game tool rather than a reliable one-card answer. Its score stays in the mid-50s because the conditions, the self-cost of banishing your own Extra Deck monsters, and the lack of combo data cap the score.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 45 | Set trap run about 2.7 copies in 288 of 400 decks, but it needs a specific Fusion + 2 same-Rank Xyz set in the Extra Deck and a matching count, so it is not a hand-live card (verified text, observed deck stats). |
| Combo & Conversion | 55 | No recorded boards, so conversion is text-only: a full opposing-field banish is strong once the count condition is met, but setup is heavy (inference). |
| Resource Economy | 55 | Returning banished monsters to the Extra Deck is a partial refuel, and wiping the opponent's field is strong advantage, offset by banishing your own Extra Deck monsters to activate (verified text, inference). |
| Effect & Interaction | 70 | Banishing all cards the opponent controls is a strong, hard-to-undo board break, though it is a set trap and can be negated in response (verified text, inference). |
| Material Utility | 10 | It is a trap card, not a monster, so it provides no material value and never converts as a body (verified text). |
| Resilience & Flexibility | 40 | A single set trap that is vulnerable to a negate and depends on Extra Deck setup, with only partial recursion for redundancy (inference). |
| Deck-Building Efficiency | 50 | One slot in Labrynth-style lists with a built-in Extra Deck resource cost and no garnet; the decks that run it are mostly Labrynth, so it is not a free splash (observed deck stats, inference). |
Calculation
Weight profile: 0.7 Board breaker / Going-second + 0.3 Recovery/Recursion. Intrinsic ≈ 53, Deck ≈ 55, Meta = provisional. Modifiers: self-locking restriction (-2). Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Banishes every card the opponent controls in one activation once the count condition is met
- Recursion returns banished monsters to the Extra Deck, giving some repeat use
- Heavily run in Labrynth lists at about 2.7 copies per deck, showing it is a practical, reliable Labrynth tool
Weaknesses
- Activation needs a specific Fusion + 2 same-Rank Xyz set and an exact Level/Rank total matched to hand and field count
- Set trap that can be negated in response
- Banishes your own Extra Deck monsters to activate, which is a real cost
Counters / choke points
- Negation of the set trap
- Opponent hand-based or Extra Deck disruption that stops the Fusion/Xyz setup
- Non-interactive boards where the count condition is not met
Best use
Board breaker / late-game field wipe. Decks: Labrynth lists (archetype 789/790/791), Phantasm Spiral lists (40% inclusion). Suggested copies: 3.
Evidence & gaps
- Verified: Trap card; effect banishes all opponent-controlled cards after a Fusion + 2 same-Rank Xyz banish and count condition; Effect returns 2 banished monsters (1 Xyz, 1 Fusion) to the Extra Deck; Run in 400/400 sampled decks at avg 2.71 copies; 288 decks run 3 copies; Phantasm Spiral StatisticsCard inclusion 40% at typical 2 copies
- Observed: Labrynth archetypes account for about 70% of sampled decks; Top partners are Labrynth cards at 63–90% co-occurrence; No combo boards recorded (0 appearances)
- Inferred: Board breaker role is primary: field wipe with recursion as secondary; Set-trap timing and negation exposure lower the resilience score; Labrynth-heavy usage suggests it is a fit-dependent rather than universal piece
- Data gaps: no combos supplied — combo conversion is text-only inference no guides supplied no banlist token — assumed 3 copies (unlimited) avg_starter_count_when_present unknown, so deck resilience is estimated






