Justi-Break
Trap Normal

Justi-Break

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Activate only when your opponent declares an attack against a face-up Normal Monster you control. Destroy all monsters on the field, except face-up Attack Position Normal Monsters.




 
 
AI Power Analysis
Board breakerConfidence: MediumEvaluated Oct 9, 2026
52± 8/ 100
Power Score
Intrinsic 53
Deck 51

Justi-Break — Power Evaluation

Final Score: 52 ± 8 · Confidence: Medium

  • Intrinsic: 52.8 · Deck: 51.3 · Meta: provisional
  • Primary role: Board breaker · Secondary: Removal

Why it scores here

Justi-Break converts a single trap into a mass-destruction effect, but only when the opponent attacks a face-up Normal Monster you control, and it keeps only face-up Attack Position Normal Monsters alive. Its real value depends on controlling Normal Monsters in the right position, which narrows when it can be played. The 22-deck footprint across 13 archetypes shows it is a practical, cheap slot in Flamvell lists, but that breadth is frequency rather than strength and did not raise the score. Zero combo evidence and a 1-slot, no-garnet cost keep the score in the mid-50s.

Axis scores

Axis Score Evidence
Accessibility 55 Trap card with 22 decks at an average of 1.82 copies and 13 archetypes, but no combo starter role or searched-for role data to confirm how often it is live in hand (observed, plus inferred from text).
Combo & Conversion 45 Text describes a one-card board wipe with a narrow trigger, but there are zero combo boards to confirm conversion or power index (inferred).
Resource Economy 30 A one-for-many wipe with no recursion or refuel in the text, so it is card-disadvantage unless the surviving Normal Monsters carry the board (inferred from text).
Effect & Interaction 60 Mass destruction on an opponent attack is a strong effect when triggered, but the attack-declaration trigger and Normal Monster condition limit how reliably it fires (verified text, plus inferred reliability).
Material Utility 0 Card is a Trap, not a monster, so it provides no material body (verified from card type).
Resilience & Flexibility 35 Requires a face-up Normal Monster on your side and an opponent attack, and a trap can be negated by interruption; no redundancy evidence was supplied (verified text, inferred).
Deck-Building Efficiency 60 One slot with no garnet or lock cost, and decks run 1 to 3 copies, but the Normal Monster requirement restricts which lists it fits (observed from copies data, inferred from text).

Calculation

Weight profile: 0.7 Board breaker + 0.3 Removal. Intrinsic ≈ 52.8, Deck ≈ 51.3, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck

Strengths

  • Single-card mass destruction that can keep a chosen subset of the opponent's board alive when triggered
  • Cheap 1-slot trap with no garnet, lock, or material cost
  • Practically included across 13 archetypes, with Flamvell as the main home

Weaknesses

  • Trigger requires the opponent to attack a face-up Normal Monster you control
  • Card-disadvantage without a refuel or recursion effect
  • No combo evidence to confirm it sets up a winning board

Counters / choke points

  • Opponent avoids attacking into your face-up Normal Monsters
  • Negation of the trap in the chain
  • Opponent keeps no attack declaration, or attacks only non-Normal monsters

Best use

Situational board-wipe trap for Normal-monster-heavy lists. Decks: Flamvell, Guardragon, Umi Control.

Evidence & gaps

  • Verified: Card text: activates on opponent attack against a face-up Normal Monster you control, destroys all monsters except face-up Attack Position Normal Monsters; Card type is Trap, so it has no material body; Formats: TCG, OCG, MasterDuel, DuelLinks
  • Observed: Present in 22 recent decks at an average of 1.82 copies (max 3); Spread across 13 archetypes, with Flamvell at 100% inclusion in usage statistics; Top partners Flamvell Guard and Cry Havoc! each appear in 54.5% of decks
  • Inferred: Primary role is Board breaker, with Removal as secondary, from text; Trigger reliability is limited by the attack-declaration and Normal Monster requirements
  • Data gaps: no combos supplied, so combo conversion is text-only inference no guides supplied no banlist token, assumed 3 copies (unlimited) no rulings or metagame sample supplied average starter count when present unavailable, so redundancy is estimated from archetype spread











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