Mermail Deck #774757 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 20/100 (±10 · Confidence: Low)

• Primary strategy: Combo
• Secondary strategies: Control, Tempo
• Format: ocg

Legality

Main 57 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Extra Deck boss monsters (Poseidra Abyss, Mermail Abyssgaios, Abysstrite) reached through Atlantean/Mermail Special Summon chains, with Atlantis and Daedalus support cards.; Link and Synchro boards (Levia-Dragoon - Daedalus, Mermail King - Neptabyss, Graydle Dragon) that pressure through direct attacks from Atlantean Dragoons.
• Turn 1 (going first): Open a Sea Serpent or Atlantean starter (Neptabyss, Mermail Shadow Squad, Deep Sea Minstrel) to search or summon a second engine piece, then reach a Level 7 or Xyz boss with Poseidra or Abysstrite. Hand traps are held for the opponent's first activation.
• Turn 2 (going second): Hold Ash Blossom, Ghost Ogre and Droll & Lock Bird for the opponent's first search or summon. Use Gameciel or Dominus Impulse to disrupt the board, then rebuild with Atlantis-family searches.
• Recovery: Recover through Mulcharmy draw effects, Deep Sea Repetiteur recursion from the GY, and Mermail Abyssteus searches once the hand is spent.
• After siding: Not evaluable: the deck has no Side Deck, so there is no post-side plan.

Why it scores here

The deck is Illegal in OCG: Ash Blossom & Joyous Spring and Dominus Impulse are each run three times against a Semi-Limited limit of two, so it receives a capped score of 20 and is treated as structural-only. Its structural read is 57 on the Combo profile, built from consistency and interaction on the system rather than from the cards. The archetype core group has an estimated 94% chance of at least one copy in a five-card opening hand (Inferred), which supports engine access. Interaction is broad, with nine hand traps, thirteen negation-text cards and eighteen removal-text cards, which earns the going-second and end-board scores. No combo boards, tournament link or side deck are supplied, so floor, median and matchup scores are low-confidence. Popularity of the Atlantean and Mermail archetypes was not used to add points, and card scores were not averaged.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 57, Going First ≈ 52, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 48. Modifiers: illegal_copy_limit_cap (-35); no_side_deck (-3). Final formula: Illegal cap applied: normal formula 0.80*Structural(57) + 0.20*TournamentReliability(48) = 55 is NOT used; the score is capped at 20 with theoretical/structural-only status (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.94 · key two-card combo ≈ — · full-brick estimate ≈ 0.06 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Engine access is high through the archetype core group (about 94% in hand, Inferred)
• Broad interaction from hand traps, negation text and removal text
• Multiple boss options in the Extra Deck, including Poseidra Abyss and Graydle Dragon

Weaknesses

• Illegal: Ash Blossom and Dominus Impulse exceed their copy limits
• Low exact-name archetype purity (6.9%) suggests a loosely connected engine
• No Side Deck, so no post-side adaptability

Critical choke points

• Legality must be fixed before any competitive reading applies; two copies of each over-limit card must be removed
• Hand traps compete for the same hand space as starters

Recommended changes

Evidence & confidence

• Verified: Illegal status: Ash Blossom & Joyous Spring and Dominus Impulse each run 3 copies against a Semi-Limited limit of 2; Main 57 and Extra 15 are within OCG size rules; Side 0 is within the 0-15 range; Exact-name Mermail purity is 6.9% (5 of 72 archetype-tagged copies)
• Inferred: Starter access ≈ 0.94 for the archetype core group in a 5-card hand; Interaction breadth from hand-trap, negation and removal text counts; Ceiling and combo conversion read from card text, not recorded boards
• Provisional: Meta Power is null because no dated metagame sample is supplied; Matchup fit (D13) is unverified without tournament data
• Data gaps: No combos supplied, so combo floor, median and ceiling are text-only inference No tournament link, so archetype meta-share and per-pilot match record are absent No win-rate telemetry exists for going-first, going-second, matchup or brick rate Meta Power is Provisional unless a dated metagame sample is supplied Deck title is null in the export