Mermail Deck #772304 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

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

Legality

Main 40 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Extra Deck Link and Xyz boards (Poseidra Abyss, Abysstrite, Azure Ocean Dragon Lord - Neo-Daedalus Rage, Mediclius) converting a field built by Atlantean and Mermail searchers; Atlantis, City of the Sea Dragon and Umi field-spell pressure with Levia-Dragon and Daedalus Maelstrom
• Turn 1 (going first): Open on Atlantean and Mermail searchers (Neptabyss, Mermail Shadow Squad, Atlantean Dragoons, Mulcharmy Purulia) and convert into a Link or Xyz board, protected by Ash Blossom, Maxx C and Infinite Impermanence
• Turn 2 (going second): Use the six-card hand's hand traps (Ash Blossom, Maxx C, Infinite Impermanence, Dominus Impulse) to answer the opponent's first board, then rebuild with the searchers
• Recovery: Recover through GY-based searchers and revivals (Warchief of Atlantis, Mermail Abysspike, Atlantean Heavy Infantry, Mermail Abyssalacia) that cost GY resources
• After siding: None: the deck runs no Side Deck, so no post-side plan is evidenced

Why it scores here

The deck is Illegal in OCG: it runs 3 copies of Barrier Statue of the Torrent and 2 of Bahamut Shark, both Forbidden, so it gets no normal Final Contextual score and this 30 is a theoretical, structural-only cap. The structural read (58) comes from the system: 14 searcher-text cards give a high chance of a starter in hand (about 0.90 for at least one searcher, 0.987 for at least one archetype core card), and the deck has 6 hand traps and several negation or removal effects that give layered interaction. Closing power comes from Extra Deck Link and Xyz bosses, but no combo boards are recorded, so floor, median and ceiling are text-only inferences. Archetype popularity and the 3 exact-name Mermail copies did not add points; exact-name purity is only 5.5 percent, and the score was not built by averaging card scores.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 58, Going First ≈ 60, Going Second ≈ 62, Meta = provisional, Tournament Reliability ≈ 50. Modifiers: banlist_exposure (-10); illegal_status_cap (-17). Final formula: Structural 58 with modifiers and tournament reliability 50 (Meta provisional) gives about 47 before the Illegal cap; the Illegal cap sets the final to 30 (theoretical only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.9 · 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 text (14 cards) gives high starter access
• Six hand traps and multiple negations give layered interaction
• Extra Deck has strong Link and Xyz closers

Weaknesses

• Illegal: Forbidden cards must be removed before any real score applies
• Cross-archetype list with 5.5 percent exact-name purity
• No Side Deck, so no post-side plan

Critical choke points

• Barrier Statue of the Torrent and Bahamut Shark are Forbidden and cannot be run in OCG
• Engines that need 5 WATER in GY (Moulinglacia) or a specific Extra Deck link before they function

Recommended changes

Evidence & confidence

• Verified: Illegal status: 3 Forbidden copies over limit; 40 Main and 15 Extra sizes are legal; 14 searcher-text cards and 6 hand traps in the list; Exact-name purity 5.5 percent
• Inferred: Starter access from hypergeometric odds; Interaction layering from card text; Going-second hand-trap coverage from hypergeometric odds; Pilotability from sequence complexity
• Provisional: Meta power and format fit (no dated meta sample); Median and floor (no recorded boards)
• Data gaps: no combos supplied: combo floor, median and ceiling are text-only inference no tournament link: archetype meta-share and per-pilot match record are absent no win-rate telemetry: going-first, going-second, matchup and brick rates are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied no Side Deck: best-of-3 adaptability cannot be measured