Mermail Deck #768067 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 45/100 (±10 · Confidence: Low)

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

Legality

Main 48 / Extra 17 / Side 0 — status under the rules at evaluation time: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Xyz and Link Extra Deck boards (Poseidra Abyss, Mermail Abyssgaios, Mermail King - Neptabyss) backed by large WATER attackers such as Mermail Abyssleed and Mermail Abyssmegalo; Direct attacks from Atlantean Dragoons and a second attack from Mermail Abyssmegalo
• Turn 1 (going first): Opening-hand searchers (Abyssteus, Abysspike, Abyssturge, Shadow Squad) chain WATER GY costs into Level 7 Mermail or Atlantean monsters, then Extra Deck summons
• Turn 2 (going second): Abyss-scale negations and Abyss-squall as interaction, then rebuild the board from the GY through Abyssocea and Abyss-squall
• Recovery: GY recursion from Abyssteus, Shadow Squad, Abysstrite and Abysspike returns WATER monsters to hand or the field after a hit
• After siding: No side deck is registered (side_count 0); no post-side plan is available to evaluate

Why it scores here

The deck is an Illegal OCG list: its Extra Deck holds 17 cards against a maximum of 15, so it receives a structural-only read and no normal Final Contextual score. Its engine is reliable on paper: a searcher is present in a five-card opening hand about 96% of the time and at least one archetype-core card about 86% of the time (both Inferred from the hypergeometric table). Conversion is mostly structural because no recorded boards exist, so ceiling and median are read from card text and not from observed output. Interaction is real but narrow, with Abyss-scale negations, Abyss-squall and Mermail Abyssgaios providing layers, and the Extra Deck supplies strong closing bodies. The score comes from consistency, recovery and interaction on the system; popularity was not credited, and card scores were not averaged. The missing side deck, the unverified Extra Deck cap and the absence of tournament data pull confidence down.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 59.5, Going First ≈ 62, Going Second ≈ 50, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Illegal Extra Deck size (17 > 15) (-12). Final formula: Theoretical cap for Illegal list: 0.80*Structural(59.5) + 0.20*TournamentReliability(45) = 56.6, then legality cap -12 => 44.6 rounded to 45 (Meta provisional; structural-only, not a normal final score)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.86 · 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

• Searcher density (22 searcher-text cards) makes the engine reliably live in the opening hand
• GY recursion through Abyssteus, Shadow Squad, Abysstrite and Abysspike gives redundant lines after one hit
• Extra Deck closing bodies (Poseidra Abyss 3000, Abyssleed 2700) and multiple negations

Weaknesses

• Illegal in OCG: Extra Deck holds 17 cards against a maximum of 15
• Heavy GY-cost activation (1 to 4 monsters discarded or sent) creates brick and resource pressure
• Exact-name Mermail purity is only 36.9%; off-archetype cards dilute the engine
• No side deck registered, so no post-side adaptability

Critical choke points

• Level 7 WATER Extra Deck summons depend on discarding WATER monsters from hand
• Only three Mermail-GY recursion effects restore the field after a hit

Recommended changes

Evidence & confidence

• Verified: Main Deck 48 and Extra Deck 17 counts; Extra exceeds OCG max 15; All 29 Main and 14 Extra distinct cards are Unlimited with 3 legal copies; Archetype purity 36.9%, off-archetype copies 41; Searcher-text count 22, negation text 6, removal text 11
• Inferred: Opening-hand starter probability ≈ 0.96 searcher and ≈ 0.86 archetype core (hypergeometric); Interaction depth from Abyss-scale negations and Abyss-squall text; Brick and GY-cost burden from card text
• Provisional: Meta fit and matchup coverage (no dated sample); Median output (no combos recorded)
• Data gaps: Deck is Illegal: Extra Deck 17 > 15; no normal Final Contextual score can be given No combos supplied: floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record absent No side deck registered (side_count 0) usage_statistics in_this_deck flags conflict with the card list for Extra Deck cards (Poseidra Abyss, Abysstrite, Mermail Abyssgaios, LeVirtue Dragon all show in_this_deck false yet appear in the Extra Deck); those flags were not relied on No win-rate telemetry exists in YGOVN