Melffy Deck #757547 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±8 · Confidence: Low)

• Primary strategy: Midrange
• Secondary strategies: Toolbox, Fusion/Synchro/Xyz
• Format: ocg

Legality

Main 56 / Extra 15 / Side 0 — status: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Melffy Beast recursion into Fusion, Synchro and Xyz boards (Melffys' Joyful Surprise, Merry Melffys, Joyous Melffys, Melffy Mommy); Hand-trap and tech-driven disruption (Ash Blossom, Ghost Ogre, Solemn cards, Nibiru, Maxx C) that keeps the Melffy engine online
• Turn 1 (going first): Open Melffy starters (Puppy, Wally, Rabbys, Catty) and use Footsteps to search Melffy monsters; build a Synchro or Xyz board while keeping Solemn cards for the opponent's first activation
• Turn 2 (going second): Use a hand trap (Ash Blossom, Ghost Ogre, Infinite Impermanence, Droll and Lock Bird) on the opponent's first summon or search, then rebuild through the Melffy recursion loop
• Recovery: Return Beast monsters to hand (Melffy Puppy, Wally, Catty, Pinny) and Special Summon again from the Deck; Footsteps recovers two Melffy cards from the GY
• After siding: Not evaluable: the deck runs no side cards, so there is no post-side plan. Structural only (Inferred)

Why it scores here

This list is Illegal because Baronne de Fleur is a Forbidden card in the Extra Deck, so the score is capped and is theoretical and structural only. Structurally the deck is a Midrange Melffy shell: 20 archetype-core copies give about a 90 percent chance of at least one archetype card in a 5-card opening hand (Inferred), and multiple Beast starters with recursion (Puppy, Wally, Catty, Rabbys, Pinny) keep the engine redundant after a single interruption. Interaction is dense (21 negation-text and 24 removal-text cards, 12 hand traps, about 78 percent chance of a hand trap in a going-second 6-card hand), which is what earns the going-second and endboard scores. The deck has no recorded boards, no guides and no tournament link, so no combo ceiling, median or meta read was possible and those dimensions sit near the midpoint with low confidence. Archetype popularity and usage statistics confirm the list is real, but they did not add points, and no card scores were averaged into the deck score. The zero-card side deck and the 47 off-archetype copies (only 33.8 percent exact-name purity) drag down side adaptability and main-deck efficiency.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 50, Going First ≈ 50, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist exposure (-12). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional): 0.80*50 + 0.20*45 = 49; minus 12 banlist-exposure modifier = 37; capped to 30 because legality is Illegal (theoretical and structural only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.9 · key two-card combo ≈ — · full-brick estimate ≈ 0.1 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Dense hand-trap and negation coverage for going second (12 hand traps, 21 negation-text cards)
• Redundant Beast recursion starters that keep the engine alive after one interruption
• Mixed Synchro, Xyz and Fusion Extra Deck gives several board routes

Weaknesses

• Illegal list: Forbidden Baronne de Fleur in the Extra Deck
• Empty side deck, so no post-side adaptation
• Low exact-name purity (33.8 percent) with 47 off-archetype copies
• No recorded combos, so ceiling and median are unmeasured

Critical choke points

• Baronne de Fleur must leave the list before the deck is legal
• The core Melffy engine depends on Beast monsters being on the field or in hand; a single Beast removal or backrow reset cuts the recursion loop

Recommended changes

Evidence & confidence

• Verified: Legality status Illegal: Baronne de Fleur is Forbidden and run at 1 copy; Main 56, Extra 15, Side 0 counts against the OCG size rules; Archetype purity 33.8 percent (24 exact, 47 off-archetype); Usage stats: 20 core cards, 9 present, 45 percent core presence
• Inferred: Starter probability about 0.90 for the archetype core in a 5-card hand; Brick proxy about 0.10 and hand-trap going-second probability about 0.78; Interaction density from card text and role flags; Going-first and going-second estimates from text, not measured data
• Provisional: Meta Power (null) and matchup fit (D13) because no dated metagame sample or tournament link exists
• 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: going-first, going-second, matchup and brick rates are Inferred Meta Power is Provisional unless a dated metagame sample is supplied Side deck is empty, so post-side scoring is structural only No guides attached for the archetype