Harpie Deck #774228 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 64/100 (±6 · Confidence: Medium)

• Primary strategy: Combo
• Secondary strategies: Toolbox
• Format: master-duel

Legality

Main 40 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Fusion Summon Gem-Knight boss monsters (Master Diamond, Lady Brilliant Diamond, Lady Lapis Lazuli) through Gem-Knight Fusion, Dispersion, Absorb Fusion and Scatter Fusion; Gem-Knight Fusion monsters that attack twice or burn on destruction (Topaz, Lady Lapis Lazuli)
• Turn 1 (going first): Normal Summon Gem-Knight Lazuli or Lapis, search a Gem-Knight with Gem-Armadillo, Nepyrim or Phantom Quartz, then Fusion Summon a 2900 to 3400 ATK boss from the Extra Deck with a Fusion Spell
• Turn 2 (going second): Use Ash Blossom, Droll and Maxx C to disrupt the opponent's first summon or draw, then rebuild the Fusion line on the following turn; Raigeki or Lightning Storm if the opponent commits a board
• Recovery: Gem-Knight Fusion and Phantom Quartz recover Fusion-material and Fusion-Spell cards from the Graveyard, and Crystal Rose or Lady Rose Diamond can reuse a Gem-Knight from the Graveyard
• After siding: No side deck is registered (Side Deck size 0), so no post-side plan can be verified

Why it scores here

The deck reliably opens a starter in most hands: twelve Fusion-Spell and Gem-Knight Fusion starters across five distinct cards give an estimated 0.85 chance of at least one starter in a 5-card going-first hand and about 0.90 in a 6-card going-second hand (Inferred, hypergeometric from the main deck). Searchers are dense (15 cards with search text, P at least one in 5 about 0.92), so a missed starter usually leaves a second route to a Gem-Knight, which earns the consistency and resilience dimensions. The Extra Deck is full at 15 with about 11 distinct Gem-Knight Fusion and Link targets, and the 2900 to 3400 ATK bosses give the closing power. Interaction is layered across hand traps (Ash Blossom, Droll, Maxx C) and board wipes (Raigeki, Lightning Storm, Harpie's Feather Duster, Forbidden Droplet), which lifts the endboard score. Points are held back by six vanilla or near-vanilla Normal Gem-Knights used only as Fusion material, several situational tech cards that dead in hand, no side deck, and no combo boards or tournament data to measure a real floor. Popularity did not earn points, and no card scores were averaged into the deck score.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 67, Going First ≈ 68, Going Second ≈ 66, Meta = provisional, Tournament Reliability ≈ 62. Modifiers: Extra-Deck Fusion dependence (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional) + ContextModifiers

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.85 · key two-card combo ≈ — · full-brick estimate ≈ — (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Twelve starter cards across five distinct names gives redundant openings
• Dense search (15 searcher cards) and graveyard recursion reduce brick impact
• Full Extra Deck with several 2900+ ATK bosses and burn payoff
• Layered interaction with three hand traps and four board or backrow wipes

Weaknesses

• Six vanilla or near-vanilla Normal Gem-Knights are dead outside Fusion material lines
• Several situational tech spells (Raigeki, Lightning Storm, Feather Duster, Foolish Burial, Forbidden Droplet) are dead when the opponent has no board
• No side deck, so no post-side adaptation
• No combo boards or tournament data to measure a real floor

Critical choke points

• Fusion Summon legality depends on having two or more Gem-Knight materials in hand or field
• Three Limited cards (Maxx C, Feather Duster, Foolish Burial) are single copies and cannot be replaced if lost

Recommended changes

Evidence & confidence

• Verified: Legal under BanMasterDuel with 40 main, 15 extra, 0 side; Restricted cards at or below legal copies (Foolish Burial, Feather Duster, Maxx C at 1; Droll at 1 of 2); Core-card and starter-card names and counts from the decklist; Extra Deck and Main Deck card stats from card data
• Inferred: P(at least one starter in 5) ≈ 0.85 and in 6 ≈ 0.90 (hypergeometric); Consistency, brick and interaction quality from card text; Going-first and going-second estimates from the engine and interaction read
• Provisional: Meta Power (null, no dated metagame sample); Matchup and format fit (D13); Side deck adaptability (D12, no side registered)
• Data gaps: Archetype label is Harpie but 45 of 54 off-archetype copies are Gem- and the deck's identity is Gem-Knight Fusion; the stored archetype label may be wrong usage statistics missing core cards lists Gem-Knight Phantom Quartz, Master Diamond, Lady Lapis Lazuli, Zirconia, Ruby, Aquamarine, Lady Rose Diamond and Lady Brilliant Diamond as missing, but all are present in the Extra Deck; the in this deck flag appears to count Main Deck only, so the missing core cards figure is an artifact No combos supplied; combo floor, median and ceiling are text-only inference No tournament link; archetype meta-share and per-pilot record absent No side deck registered (Side Deck size 0) No win-rate telemetry (going-first, going-second, matchup, brick or starter rates) Meta Power is Provisional unless a dated metagame sample is supplied