Battle Fusion
Spell Quick

Battle Fusion

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When an attack is declared involving a Fusion Monster you control and an opponent's monster: That monster you control gains ATK equal to the ATK of the opponent's monster, until the end of the Damage Step. You can only activate 1 "Battle Fusion" per turn.




 
 
AI Power Analysis
UtilityConfidence: MediumEvaluated Oct 8, 2026
46± 8/ 100
Power Score
Intrinsic 42
Deck 49

Battle Fusion — Power Evaluation

Final Score: 46 ± 8 · Confidence: Medium

  • Intrinsic: 42 · Deck: 49 · Meta: provisional
  • Primary role: Utility · Secondary: Board breaker

Why it scores here

Battle Fusion is a one-copy Quick-Play battle trick. Its value is a single-battle ATK boost for a Fusion Monster you control, with no card advantage, no search, and no lasting board. The card is played in 43 sampled decks, mostly alongside Polymerization (69.8% of decks), which confirms it is a live, practical pick in Fusion lines. Its evidence does not show a high-power engine, so the score stays in the middle range.

Axis scores

Axis Score Evidence
Accessibility 45 Quick-Play that must be drawn; it is in 43 recent decks but has no searcher or starter evidence (observed deck frequency, inferred access).
Combo & Conversion 35 The effect only swings one battle and needs a Fusion Monster already on the field; no combo boards are recorded (inferred from text).
Resource Economy 25 A one-for-one spell with no draw, search, or recursion in its text (verified).
Effect & Interaction 30 Gives no removal or negation; it only wins a battle against an opposing monster (verified from text).
Material Utility 0 A Spell Card cannot be used as material (verified from card type).
Resilience & Flexibility 35 Can be negated by common counters and is limited to one activation per turn (verified from text; partner list shows Ash Blossom is common).
Deck-Building Efficiency 70 Single-copy staple with no garnet or lock restriction (observed from copies distribution, 38 of 43 decks run one copy).

Calculation

Weight profile: 0.7 Utility + 0.3 Board breaker. Intrinsic ≈ 42, Deck ≈ 49, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck

Strengths

  • Live in 43 sampled decks across 21 archetypes
  • Cheap single-copy slot with no restriction
  • Converts a Fusion Monster's attack into a won battle

Weaknesses

  • Needs a Fusion Monster already on the field
  • No card advantage, search, or recursion
  • Only one battle per turn, no lasting board impact

Counters / choke points

  • Ash Blossom & Joyous Spring (observed as a common partner, which also implies it is a common counter in these decks)
  • Mirror Force (observed as a partner, indicating the opponent's trap interaction is an active risk)

Best use

Battle-step finisher or combat trick alongside Polymerization. Decks: Fusion-based decks such as Shaddoll, Heroic, Cyber Dragon, and Red-Eyes. Suggested copies: 1.

Evidence & gaps

  • Verified: Quick-Play Spell that boosts a Fusion Monster's ATK in battle, once per turn (card text); Single-copy in 38 of 43 decks (deck copies distribution)
  • Observed: Present in 43 recent decks across 21 archetypes (deck evidence); Polymerization in 69.8% of decks (partner evidence)
  • Inferred: Practical value is a battle-step finisher, not a board engine (text-based inference); Vulnerable to common counters based on partner frequency (inference)
  • Data gaps: no combos supplied — combo conversion is text-only inference no guides supplied no banlist token — assumed 3 copies (unlimited) no usage statistics (StatisticsCard) — archetype inclusion % inferred from deck sample only











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