Mermail Deck #769131 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 35/100 (±8 · Confidence: Low)

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

Legality

Main 57 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 3 violation(s).

Identity & game plan

• Win condition: Water Atlantean/Mermail engine: searchers (Neptabyss, Abyssteus, Abysspike, Dragoons) and Extra Deck Synchro/Xyz/Link bodies (Poseidra Abyss, Abyssgaios, Monoceros, Zealantis) convert into board pressure; Fish/Sea Serpent recursion and Moulinglacia/Deep Sea lines as an alternative board-builder
• Turn 1 (going first): T1: Deck Lockdown or Mulcharmy/First Penguin/Abyssrhine searcher lines into a Synchro/Xyz Summon; hold Ash Blossom and Dominus Impulse for the opponent's first response
• Turn 2 (going second): Use Ash Blossom and Dominus Impulse to protect the first Special Summon, then rebuild from the searcher lines
• Recovery: Mermail/Atlantean searchers and GY recursion (Abyssteus, Abysspike, Shadow Squad, Dragoons) refill the hand after a board wipe
• After siding: None: the deck has no side deck, so there is no post-side plan in the list as submitted

Why it scores here

The list cannot be scored as a normal legal deck: Ash Blossom and Dominus Impulse are each run three times against an OCG limit of two, so the Final score is capped at 35 and this evaluation is theoretical/structural only. Structurally the Atlantean/Mermail searcher package (18 searcher-text cards) and a 15-card Extra Deck of Synchro, Xyz and Link bodies give a reasonable chance of a live engine on T1-T2, and the hand-trap and negation suite (Ash, Dominus, Forbidden Droplet, Forbidden Crown, Deck Lockdown) gives real interaction. The weaknesses are the 66 off-archetype copies (exact-name purity 8.3%) spread across roughly 20 sub-archetypes, the absence of any side deck, and the lack of recorded boards, so floor and median output cannot be measured. Popularity of the Mermail archetype was not credited, and card scores were not averaged into the deck score.

Dimension scores

How the score was computed

Strategy profile: Midrange primary with Combo secondary, Midrange weights used as-is. Structural ≈ 53, Going First ≈ 55, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Illegal copy-limit violation (-8); No side deck (-4); Illegal-deck cap (0). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability = 0.80*53 + 0.20*45 = 51.4; modifiers total -12 = 39.4; Illegal cap applied: min(39.4, 35) = 35 (theoretical/structural only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.24 · 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 package (18 searcher-text cards) for repeatable T1-T2 access (Inferred)
• Layered interaction: Ash Blossom, Dominus Impulse, Forbidden Droplet, Forbidden Crown, Deck Lockdown, Lightning Storm and Illusion Gate (Verified card text, Inferred value)
• Extra Deck covers Synchro, Xyz and Link routes with several high-ATK closers (Verified)

Weaknesses

• Illegal as submitted: Ash Blossom and Dominus Impulse each run 3 copies against an OCG limit of 2 (Verified)
• No side deck: no post-side adaptability (Verified)
• Low archetype purity (8.3% exact-name) and 66 off-archetype copies, which hurts hand consistency (Verified/Inferred)
• No recorded combos, so floor, median and ceiling are unmeasured (Verified gap)

Critical choke points

• Starting searcher lines (Neptabyss, Abyssteus, Dragoons, Abysspike) carry most of the consistency; a hand without one is unlikely to find an Extra Deck summon (Inferred)
• Ash Blossom and Dominus Impulse are the main protection, and at 2 legal copies the deck has less protection than the list suggests (Verified)

Recommended changes

Evidence & confidence

• Verified: Illegal copy-limit violations: Ash Blossom and Dominus Impulse at 3 copies vs OCG limit 2; Main 57 / Extra 15 / Side 0 and the size rules; Exact-name archetype purity 8.3% and 66 off-archetype copies; Card text for the searchers, hand traps and Extra Deck bodies
• Inferred: Hypergeometric starter access (P at least one searcher in hand 5 approx 0.86; core group approx 0.94); Brick and conflicting-hand rate from composition; Interaction density from role tags and negation text; Going-first and going-second split reasoning
• Provisional: Meta Power (null: no dated metagame sample); Matchup and format fit (D13: no tournament link)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record absent No win-rate or going-first/second telemetry exists in YGOVN Meta Power is Provisional unless a dated metagame sample is supplied Deck title is null in the export