Harpie Deck #773779 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 62/100 (±8 · Confidence: Medium)

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

Legality

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

Identity & game plan

• Win condition: Fusion Summon Gem-Knight Extra Deck boss monsters (Lady Brilliant Diamond, Master Diamond, Topaz, Ruby) through Gem-Knight Fusion, Brilliant Fusion, Dispersion, Scatter Fusion and Absorb Fusion, then press with high ATK fusions; Recursion-driven grind: Gem-Knight GY effects (Garnet, Lazuli, Brilliant Rose, Crystal Rose) rebuild the fusion line after disruption
• Turn 1 (going first): Turn 1 search and Fusion Summon via Gem-Knight Fusion or Brilliant Fusion using Lapis and Gem-Knight monsters, then a second fusion line from the GY or Extra Deck; Feather Duster or Lightning Storm clears backrow or monsters when the board is open
• Turn 2 (going second): Hand trap first (Ash Blossom, Maxx C, Droll and Lock Bird) to protect the fusion starter, then a fusion line through the opponent board; Raigeki or Lightning Storm if the opponent has committed monsters
• Recovery: Gem-Knight GY recursion: Garnet, Lazuli, Brilliant Rose and Crystal Rose return to hand or field, and Dispersion and Scatter re-enter fusion lines from the Extra Deck
• After siding: No side deck in Master Duel; no post-side plan exists in this format

Why it scores here

The deck reliably opens a fusion line: 15 main-deck cards (three Gem-Knight Fusion, three Brilliant Fusion, three Quartz, plus Dispersion, Scatter and Absorb) give an estimated ~92 percent chance of at least one fusion starter in an opening 5-card hand, which carries most of the consistency score (Inferred). Conversion is strong on paper: the Extra Deck holds high-ATK fusion bosses (Lady Brilliant Diamond 3400 ATK, Master Diamond 2900 with growth, Topaz with double attack), but no recorded boards exist, so conversion and median output are text-based estimates. Survival comes from three hand traps, Lightning Storm and Raigeki for the board, and Gem-Knight GY recursion that rebuilds the line after disruption. Five main-deck slots (Raigeki, Foolish Burial, Forbidden Droplet, Lightning Storm, Feather Duster) are conditional or non-engine and will dead-draw in some hands, which caps brick management and pilotability. Popularity and the archetype core-card statistics confirm the list is a real, accessible build, but they earned no power points, and no dimension score was produced by averaging individual card scores.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 66.4, Going First ≈ 68, Going Second ≈ 60, Meta = provisional, Tournament Reliability ≈ 60. Modifiers: dead-draw non-engine slots (-2); banlist exposure at copy limit (-1). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional) + ContextModifiers = 0.80*66.4 + 0.20*60 - 3 = 62

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.92 · key two-card combo ≈ — · full-brick estimate ≈ 0.08 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Consistent fusion access: 15 starter-capable cards in 40 main, with three copies each of the core fusion spells
• Broad Extra Deck coverage: 11 distinct fusion and link monsters, with several high-ATK bosses
• Recursion through Gem-Knight GY effects rebuilds the line after disruption
• Three hand traps plus Lightning Storm and Raigeki cover the main interaction vectors

Weaknesses

• Five non-engine or conditional main-deck slots dead-draw in fusion hands
• No side deck, so post-game adaptation does not exist in Master Duel
• Archetype label Harpie is inconsistent with a Gem-Knight Fusion list, which weakens archetype-level comparison
• Heavy dependence on Gem-Knight monsters as fusion materials, so a hand of only Lapis or spells can stall

Critical choke points

• Gem-Knight Fusion or Brilliant Fusion as the single main-deck starter route when the opponent holds hand traps
• Gem-Knight monster count in hand for Master Diamond Dispersion and Lady Brilliant Diamond (3 Gem-Knight monsters required)

Recommended changes

Evidence & confidence

• Verified: Main count 40 and Extra count 15 are within Master Duel size rules; All restricted cards run at or below legal copy limits; Copy histogram and type spread match the card list; Extra Deck breakdown is 13 fusion and 2 link
• Observed: Archetype composition: 45 Gem- cards in the archetype spread; Core Gem-Knight cards are present at inclusion 100 percent in the usage stats
• Inferred: Starter access about 0.92 for at least one starter in opening 5; Brick rate and dead-draw slot count; Interaction and resilience scoring from card text; Offensive power from card text
• Provisional: Meta Power (null, no dated metagame sample); Matchup and format fit (no tournament link); Tournament reliability
• Data gaps: no combos supplied - combo floor, median and ceiling are text-only inference no tournament link - archetype meta-share and per-pilot match record absent no win-rate telemetry for Master Duel, so going-first, going-second and matchup figures are Inferred Meta Power is Provisional unless a dated metagame sample is supplied Archetype label Harpie does not match the composition (Gem-Knight Fusion); archetype-level stats may be misattributed usage_statistics marks Gem-Knight Phantom Quartz, Lady Brilliant Diamond, Master Diamond and other Extra cards as not in this deck, but the cards array lists them in the Extra zone with copies, so the missing_core list and core_present_pct (64) appear understated; likely the check ignores the Extra Deck deck title is null