LIGHT
8Masked HERO Koga
Archetype:
Masked HERO
ATK:
2500
DEF:
1800
View:
5145
Must be Special Summoned with "Mask Change" and cannot be Special Summoned by other ways. This card gains 500 ATK for each monster your opponent controls. Once per turn, during either player's turn: You can banish 1 "HERO" monster from your Graveyard, then target 1 face-up monster on the field; that target loses ATK equal to the ATK of the monster banished to activate this effect, until the end of this turn.
Masked HERO Koga — Power Evaluation
Final Score: 58 ± 5 · Confidence: Medium
- Intrinsic: 55 · Deck: 56 · Meta: provisional
- Primary role: Boss/End-board · Secondary: Removal/Interaction
Why it scores here
Koga is a solid Fusion end-board piece in HERO decks, running at high density (93.7% co-deck with Mask Change) across 34 distinct archetypes. Its 2500 ATK base and flexible ATK-reduction effect provide board presence and tactical interaction, but the card lacks card-advantage generation and combo-board validation. The reliance on Mask Change summoning is a single point of failure, and the GY cost for the effect can compete with other HERO synergies. Overall, Koga scores as a competent but not exceptional Fusion, earning points for deck integration and effect flexibility rather than explosive power or resource efficiency.
Axis scores
| Axis | Score | Evidence |
|---|---|---|
| Accessibility | 68 | Mask Change co-appears in 93.7% of decks running Koga, but summoning is locked to this single spell card, and Mask Change is a high-density search target in HERO decks (verified). |
| Combo & Conversion | 48 | Koga is a payoff of Mask Change with a one-per-turn ATK-reduction effect, but combo boards are entirely absent from evidence, so conversion power is text-only inference (inferred). |
| Resource Economy | 38 | Effect costs one HERO banish per activation with no card advantage or search generated; GY resources are valuable in HERO decks for other synergies like Vyon search and Fusion loops (verified). |
| Effect & Interaction | 55 | HOPT ATK reduction on either player's turn provides flexible interaction, but reduction is soft, not removal, and utility depends on opponent board state (verified). |
| Material Utility | 42 | Level 8 Fusion provides acceptable defense when effect-negated, but does not synergize with Xyz (Level 4 partners) and is named HERO for fusion loops only, a niche use (inferred). |
| Resilience & Flexibility | 54 | Vulnerable to Mask Change negation and disruption of the hand HERO, but once on field is a live 2500-ATK body with a multi-turn HOPT effect usable on either player's turn (verified). |
| Deck-Building Efficiency | 72 | Extra Deck slot with no main-deck garnet; Mask Change is already central to HERO decks; Koga runs at 1.05 copies average, suggesting clean and efficient slotting (verified). |
Calculation
Weight profile: Primary role: Boss/End-board. Intrinsic ≈ 55, Deck ≈ 56, Meta = provisional. Modifiers: Clean Extra Deck integration (2). Final formula: 0.40*Intrinsic + 0.60*Deck
Strengths
- High deck presence and consistency: 365 decks with 93.7% Mask Change co-occurrence
- Flexible HOPT effect usable on either player's turn for tactical ATK reduction
- Clean integration into HERO ecosystems (34 distinct archetypes supported)
- Acceptable defensive body (2500 ATK) that remains useful when effect is negated
Weaknesses
- Single summoning route (Mask Change only) creates a point of failure
- Generates no card advantage; effect cost (GY banish) competes with other HERO synergies
- Combo-board power is unvalidated; no combo data exists to confirm board-building capacity
- ATK reduction is soft interaction, not removal; utility depends on opponent's board state
- Level 8 does not synergize with Xyz; material utility is limited to fusion loops
Counters / choke points
- Mask Change negation or blocking prevents summoning entirely
- Hand disruption of the HERO intended for Mask Change blocks the line
- Common removal effects (Raigeki, Kaiju, targeting destruction) can answer Koga after summoning
- If opponent board is empty or low-ATK, the effect gains less value
Best use
Fusion end-board payoff of Mask Change with tactical ATK reduction. Decks: Heroic, Heros, Masked HERO, Destiny HERO, Evil HERO. Suggested copies: 1.
Evidence & gaps
- Verified: Koga must be summoned exclusively with Mask Change spell card; cannot use other fusion methods; Gains 500 ATK for each monster opponent controls (scales 0-2500+ conditional boost); HOPT banish-from-GY effect that reduces target monster's ATK until end of turn; Effect is usable on either player's turn (unusual for fusion effects); 365 decks run Koga; Mask Change co-appears in 93.7% (342 decks); Average copies per deck: 1.05 (mostly 1-copy, some 2-copy slots)
- Observed: 35.1% of Koga-running decks are Heroic archetype (128 out of 365); 27.4% are Heros archetype (100 out of 365); Distinct archetypes running Koga: 34 total; Top 5 partners: Mask Change (93.7%), Stratos (89%), Sunrise (77.3%), Vyon (69%), Liquid Soldier (73.4%); 34 distinct archetypes support Koga, confirming multi-home versatility within HERO ecosystem
- Inferred: Koga is a payoff card of Mask Change, not a combo starter or enabler; GY effect is reliable because HERO decks run many named HERO monsters (Stratos, Vyon, Shadow Mist, Liquid Soldier); ATK reduction is situational soft removal, useful for damage control and tactical value, not a hard negation; Level 8 typing does not synergize with Xyz monsters (deck runs Level 4 partners: Stratos, Vyon, Anki, Shadow Mist); Summoning reliance on single Mask Change spell creates vulnerability to disruption on the Stratos-into-Mask-Change line
- Data gaps: No combos supplied: combo conversion and board-building capacity validated only by text and guide snippets, not empirical board data No banlist token: assumed unlimited (3 copies legal), no ban status to adjust score No usage statistics (StatisticsCard): archetype inclusion rates inferred from 365-deck sample only, not historical trend data No metagame sample: cannot assess seasonal meta power, only contextual Intrinsic and Deck power No combo examples: cannot verify whether Koga's starter/searched/material/payoff roles match text-based inference