Mermail Deck #609482 — Yu-Gi-Oh! TCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 40/100 (±8 · Confidence: Low)

• Primary strategy: Midrange
• Secondary strategies: Toolbox, Tempo
• Format: tcg

Legality

Main 58 / Extra 15 / Side 0 — status: Illegal. 8 violation(s).

Identity & game plan

• Win condition: Extra Deck boss monsters (Poseidra Abyss, Mermail Abyssgaios, Abysstrite, Icejade Gymir Aegirine) built from Atlantean/Mermail WATER engine plays; Direct-attack and ATK-buff pressure from Atlantean Dragoons and Abyssrhine-based Xyz lines
• Turn 1 (going first): Open a starter from the Atlantean/Mermail core (archetype core P(≥1 in opening 5) ≈ 0.99), search or summon Neptabyss/Mermail Abyssteus/Mermail Abysspike, and build toward a Xyz or Link boss
• Turn 2 (going second): Use Ash Blossom, Droll & Lock Bird, and Dominus Impulse to disrupt the opponent's first summons, then rebuild the WATER board with GY-triggered summons
• Recovery: Recover through GY-triggered effects (Atlantean Heavy Infantry, Mermail Shadow Squad, Atlantean Dragoons) that re-add or summon WATER monsters
• After siding: Not evaluable: side_count is 0, so there is no post-side plan in the export

Why it scores here

The score reflects the deck as a system, not an average of its cards. The Atlantean/Mermail core is dense enough that a live starter is very likely in the opening hand (P(≥1 core card in 5) ≈ 0.99, Inferred), and the WATER recursion lets the deck keep its engine going through a single disruption. Interaction is layered: 15 negation-text cards and 5 hand traps give broad coverage. Closing power comes from 2800-ATK boss monsters in the Extra Deck. Popularity did not earn points: the archetype's usage stats confirm the list is real, not that it is strong, and no combo, tournament or win-rate data was supplied, so floor, median and matchup scores are inferred or provisional. The list is illegal (four Forbidden cards and four copy-limit violations), and the rubric caps an illegal list low, so the final score is set at 40 as a structural-only estimate. The deck has no side deck, so post-side adaptability scores low.

Dimension scores

How the score was computed

Strategy profile: Midrange primary, no meta-neutral re-normalisation needed (D13 kept at provisional 50). Structural ≈ 60, Going First ≈ 62, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 55. Modifiers: banlist exposure (-12). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional) = 59, then banlist-exposure modifier −12 = 47, then capped at 40 because the list is Illegal (structural-only estimate)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.99 · 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

• Archetype core is dense: almost every opening hand contains a live Atlantean/Mermail starter
• Layered interaction: 15 negation-text cards and 5 hand traps
• Extra Deck bosses reach 2800–3000 ATK
• WATER recursion gives alternate routes after one interruption

Weaknesses

• Illegal list: four Forbidden cards and four copy-limit violations
• No side deck (side_count 0), so no post-side adaptability
• No combo, tournament or win-rate data to confirm floor, median or matchup strength
• Several non-engine tech and spell cards dilute the core (9.6% exact-name purity)

Critical choke points

• Forbidden cards (Trishula, Called by the Grave, Crossout Designator, Barrier Statue) must be removed before the list is playable
• Dependence on the WATER summon chain: a single disruption on the starter can stall the Extra Deck boss line

Recommended changes

Evidence & confidence

• Verified: Legality: four Forbidden cards and four copy-limit violations (Verified); Main 58, Extra 15, side 0 against TCG size rules (Verified); Card text and banlist status for every listed card (Verified); Archetype core P(≥1 in opening 5) ≈ 0.99 (Verified hypergeometric)
• Observed: Usage statistics confirm the core archetype cards are commonly run (Observed)
• Inferred: Engine consistency and brick estimate (Inferred); Interaction breadth from text (Inferred); Going-first and going-second strength (Inferred)
• Provisional: Meta Power (null); Matchup coverage (D13) and tournament reliability
• Data gaps: no combos supplied — combo floor/median/ceiling is text-only inference no tournament link — archetype meta-share and per-pilot match record absent no win-rate telemetry exists in YGOVN — going-first/second, matchup, brick and starter rates are Inferred Meta Power is Provisional unless a dated metagame sample is supplied No side deck, so post-side plan cannot be evaluated