Mermail Deck #771859 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

• Primary strategy: Midrange
• Secondary strategies: Stun
• Format: ocg

Legality

Main 59 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Atlantean/Mermail/Daedalus Xyz, Link and Synchro boss monsters (Poseidra, Abysstrite, Levia-Dragon, Mermail Abyssgaios) built through Atlantean searchers (Inferred from card text); Atlantis/Umi field-based Level and summon synergies (Inferred from card text)
• Turn 1 (going first): Open on a searcher or Atlantean/Mermail starter, convert into a Extra Deck boss, and hold Ash/Droll/Solemn-type interaction for the opponent's first response (Inferred)
• Turn 2 (going second): Use the hand traps (Ash, Dominus, Evenly Matched, Droll & Lock Bird, Solemn cards) to stop the opponent's summon, then rebuild through the Atlantean engine (Inferred)
• Recovery: Recursion through GY-triggered effects (Mermail Abysspike, Atlantean Heavy Infantry, Warchief of Atlantis, Mulcharmy Purulia) and searchers (Inferred)
• After siding: Not available: the deck runs 0 side-deck cards, so there is no post-side plan (verified from legality.side_count)

Why it scores here

The score is capped at 30 because the list is Illegal: Ash Blossom & Joyous Spring and Dominus Impulse are each run 3 times against an OCG Semi-Limited limit of 2, so this is a structural-only read (Verified legality). On the system, the deck opens reliably: the Atlantean and Mermail searchers give about 85% of hands at least one searcher, and the archetype core group gives roughly 97% at least one copy in a 5-card opening hand (Inferred hypergeometric estimate). It converts into Extra Deck bosses such as Poseidra, Abysstrite and Levia-Dragon, but no recorded boards exist, so the combo ceiling and median are text-only inference (Inferred). Its interaction density is high (Ash, Dominus, Droll & Lock Bird, three Solemn cards and Evenly Matched), which earns the most points on the endboard and going-second dimensions. Popularity and meta share earned no points, no card scores were averaged, and the deck has no side deck, so post-side adaptability is weak.

Dimension scores

How the score was computed

Strategy profile: Midrange weights used as the single profile; Stun is a secondary strategy label only. Structural ≈ 56, Going First ≈ 58, Going Second ≈ 60, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Illegal copy-limit violation (cap) (-12); Banlist exposure (-6); No side deck (-3); Engine conflicts (-3). Final formula: No reliable metagame: 0.80*Structural(56) + 0.20*TournamentReliability(45) = 53.8; plus modifiers (-12) = 41.8; capped at 30 because the deck is Illegal (theoretical/structural-only, no normal final score)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.97 · 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

• Dense searcher and starter access (about 85% searcher and about 97% archetype-core in a 5-card hand)
• Layered interaction: 6 hand traps plus negation text on about 15 cards
• Multiple Extra Deck boss options across Link, XYZ and Synchro

Weaknesses

• Illegal list: two cards exceed their OCG Semi-Limited copy limit
• No side deck (0 cards)
• Low archetype purity (2.7%) across 7 sub-themes
• Combo ceiling and median cannot be measured (no recorded boards)

Critical choke points

• Both over-limit cards (Ash Blossom, Dominus Impulse) are core interaction; a legal list loses copies of both
• Many effects depend on Atlantis/Umi field or GY conditions, so the field spell and GY-triggered effects are single points of failure (Inferred)
• Negation-heavy interaction with no side deck leaves no adjustment after game 1

Recommended changes

Evidence & confidence

• Verified: Illegal status: Ash Blossom and Dominus Impulse at 3 copies vs OCG Semi-Limited limit 2; Main 59, Extra 15, Side 0 within OCG size rules; Limited cards each run 1 copy (legal); Card text and stats for all listed cards; Archetype-core usage stats: 15 of 25 core cards present
• Inferred: Hypergeometric opening-hand estimates (starter about 0.97, searcher about 0.85, hand trap about 0.49); Midrange primary and Stun secondary strategy read from interaction density; Going-first and going-second estimates from card text; Interaction quality read from negation and removal text
• Provisional: Meta Power (no dated metagame sample); Matchup and format fit (D13 = 50)
• Data gaps: Deck is Illegal (copy-limit violations); no normal Final score is possible No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record are absent No win-rate telemetry (going-first/second, matchup, brick and starter rates) No side deck: post-side plan and D12 cannot be measured No guides attached (guides_evidence total 0) Meta Power is Provisional unless a dated metagame sample is supplied