Mermail Deck #771583 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 56/100 (±8 · Confidence: Medium)

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

Legality

Main 55 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Xyz and Synchro closers (Poseidra Abyss 3000 ATK, Levia-Dragon 2600, Abysstrite, Number 37 family) backed by Atlantean and Umi board presence and direct-attack effects (Atlantean Dragoons); Recursion-driven grind: GY effects (Heavy Infantry, Shadow Squad, Dragoons, Neptabyss) rebuild the Extra Deck threats after interaction
• Turn 1 (going first): Open Advent of Atlantis or Call of Atlantis with Fish Sonar or First Penguin to search Atlantis or Umi cards, then establish Atlantis, City of the Sea Dragon and a Level 3 or 4 monster that feeds an Xyz
• Turn 2 (going second): Respond with Black Horn of Heaven, Twin Twisters, Raigeki or Ice Barrier, then use Summon-chained Atlantean monsters to rebuild a board; no hand traps are present so the going-second plan depends on the main-deck spells and traps
• Recovery: Searchers (27 copies of searcher-text cards) and GY-activated effects (Warchief, Dragoons, Heavy Infantry, Shadow Squad, Poseidra) re-supply starters after a board wipe
• After siding: No side deck is registered, so there is no post-side plan; the list cannot re-tune between games

Why it scores here

The deck opens reliably: the archetype core group gives roughly 0.91 probability of at least one core card in a 5-card opening hand, and 27 copies of searcher-text cards give about 0.97 probability of a search effect in hand, so the engine comes online often and has redundant starters. Its interaction is broad and mostly spell-speed-agnostic (Black Horn, Twin Twisters, Raigeki, Ice Barrier, Daedalus Maelstrom, Virtue Stream), which earns the end-board interaction score. Closing power comes from several 2600–3000 ATK Xyz and Synchro threats and direct-attack effects, but the score is held back by no hand traps, no side deck, a large share of non-monster slots (26 of 55), and Umi-gated effects that make the line harder to pilot. No combo boards were recorded, so the ceiling and median are Inferred from card text, and popularity or usage share did not earn points. The score was derived from consistency, recovery and interaction on the whole system, not by averaging the individual card scores.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 60, Going First ≈ 66, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 55. Modifiers: no side deck (-2); Umi-gated effects (-1). Final formula: 0.80*Structural(60.35) + 0.20*TournamentReliability(55) + ContextModifiers(-3) = 56.3; Meta provisional

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.91 · key two-card combo ≈ — · full-brick estimate ≈ 0.09 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Starter redundancy: multiple searchers and several first-turn starters
• Broad interaction across negation, destruction and spell removal
• Closing threats at 2600–3000 ATK with direct-attack and recursion support

Weaknesses

• No hand traps, so going second is weak
• No side deck at all, so there is no post-side adaptation
• Non-monster density is high (26 of 55) with Level 0 and situational spells and traps

Critical choke points

• Advent of Atlantis, Call of Atlantis and Fish Sonar carry most of the search engine; losing them to hand disruption slows the line
• Atlantis, City of the Sea Dragon is a single copy; it is needed for Umi-gated effects and for the Daedalus Maelstrom condition

Recommended changes

Evidence & confidence

• Verified: Main deck 55 cards and Extra Deck 15 cards are within the OCG size rules (0–60 / 0–15); All 33 distinct cards are Unlimited (no banlist exposure); Side deck is empty (Side Deck size 0); Searcher-text card count is 27 and negation-text card count is 11
• Inferred: Archetype core group hand-5 probability ≈ 0.907; Engine accessibility, brick rate and interaction quality are estimated from card text and composition; Going-second weakness follows from the absence of hand traps
• Provisional: Meta Power (null) and D13 matchup fit, since no dated metagame sample is supplied
• 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/second, matchup and brick rates are unmeasured Side deck is empty, so post-side scoring rests on composition only Meta Power is Provisional unless a dated metagame sample is supplied