Trap
NormalMagical Arm Shield
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When your opponent declares an attack while you control a monster: Target 1 face-up monster your opponent controls, except the attacking monster; take control of that target until the end of the Battle Phase, and if you do, it is attacked instead, and you proceed to damage calculation.
Magical Arm Shield — Power Evaluation
Final Score: 47 ± 8 · Confidence: Medium
- Intrinsic: 49 · Deck: 45 · Meta: provisional
- Primary role: Removal / Negation · Secondary: Board breaker
Why it scores here
Magical Arm Shield is a defensive trap that disrupts opponents' attack plans by redirecting non-attacking monsters into the crossfire, potentially protecting your own board pieces and enabling opponent monster destruction. Its score of 47 reflects solid effect interaction (55, redirects attacks to disrupt momentum) and exceptional deckbuilding flexibility (75, splashable across 14 archetypes with no locking), offset by zero combo conversion (12, purely reactive), modest resource economy (35, no advantage), zero material utility (0, trap type), and vulnerability to trap negation (resilience 25). The 26-deck presence confirms recognizable tech status, but zero combo appearances indicate it serves only defensive utility, not board-building.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 45 | Trap card always run as 1-of across 14 distinct archetypes suggests splashable but conditional tech slotting; must be set before activation and requires a controlled monster when opponent attacks (observed). |
| Combo & Conversion | 12 | Zero combo board appearances and reactive text that only triggers on opponent's attack declaration demonstrate no board-building capacity; pure defensive redirection with no extension (verified). |
| Resource Economy | 35 | Activation is conditional on opponent's attack and generates no card advantage, searches, or recursion; roughly neutral in preventing damage versus consuming a deck slot (verified). |
| Effect & Interaction | 55 | Redirects one non-attacking monster to be attacked instead, disrupting attack momentum and potentially destroying opponent's monsters; limited to non-attacking targets and playaroundable if opponent lacks targets (verified). |
| Material Utility | 0 | Trap card type cannot serve as Synchro, Fusion, XYZ, or Link material; no body value before or after effect resolution (verified). |
| Resilience & Flexibility | 25 | Vulnerable to trap negation or destruction before activation; activation window limited to opponent's Battle Phase with no recovery or redundancy since always run as 1-of (verified). |
| Deck-Building Efficiency | 75 | Always run as 1-of with zero locking effects or garnet risk; splashable across 14 archetypes at near-zero deck cost, confirming exceptional efficiency (verified). |
Calculation
Weight profile: Removal / Negation role. Intrinsic ≈ 49, Deck ≈ 45, Meta = provisional. Modifiers: none. Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- Splashable across 14 distinct archetypes with minimal deckbuilding cost
- Disrupts opponent's attack plan by redirecting non-attacking monsters
- Protects critical board pieces from destruction in battle
- Can destroy opponent's monsters if redirected to face lower ATK attackers
- No locking effects or garnet risk; clean tech slot
Weaknesses
- Normal Trap speed makes it vulnerable to negation before activation
- Requires a controlled monster as activation condition
- Limited to redirecting one non-attacking monster per attack
- Generates no card advantage or resources
- Always run as 1-of, indicating non-core status in any deck
- Opponent can bypass by attacking only your controlled monsters
Counters / choke points
- Negation of trap activation (Ash Blossom, Solemn Judgment)
- Spell/Trap destruction before or after setting
- Board wipe removing your monsters before attack phase
- Declaring attack on only your controlled monsters
- Targeting removal on non-attacking monsters pre-attack
Best use
Defensive trap for disrupting attack momentum and protecting board pieces. Decks: Red-Eyes, Skull Servant, Fire King, Pendulum Magician, Dragonmaid. Suggested copies: 1.
Evidence & gaps
- Verified: Normal Trap frame type (from card frame field); Effect redirects attack to different target (from description); Present in 26 decks across 14 archetypes (from deck data); Always run as 1-of (from copies per deck.distribution); Zero combo board appearances (from combo data.appearances = 0); No searcher effects in card text (from description)
- Observed: 26 decks sampled across diverse archetypes confirms tech slot status; Red-Eyes 15.4%, Skull Servant 11.5%, Fire King 7.7% most common; Top partners are generic staples (Foolish Burial, Raigeki), not Magical Arm Shield synergies; 14 distinct archetypes indicate splashability across strategies
- Inferred: Trap must be set before activation (Normal Trap mechanics); Activation requires opponent's attack declaration and your controlled monster; Can protect your monsters from destruction by redirecting attacks; Can destroy opponent's monsters through clever attack redirection; Splashable due to broad archetype adoption and no deck restrictions; Not a combo piece given reactive nature and zero combo appearances
- Data gaps: No combo boards supplied — combo conversion is text-only inference No guides supplied — deck integration context inferred from archetype distribution No banlist restriction — assumed unlimited (3 copies) based on empty legal copies No usage statistics (StatisticsCard) — inclusion % inferred from 26-deck sample only No top-card rankings — cannot confirm metagame prevalence or competitive adoption