Mermail Atlantean Deck #759667 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 65/100 (±6 · Confidence: Medium)

• Primary strategy: Combo
• Secondary strategies: Midrange, Toolbox
• Format: master-duel

Legality

Main 40 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Graveyard-recursion engine (discarding WATER monsters to trigger effects) that converts into Poseidra Abyss (3000 ATK Xyz), Mermail Abyssgaios (2800 ATK Xyz) and Poseidra (2800 ATK) boards; Direct-attack pressure from Atlantean Dragoons onto Level 3 or lower Sea Serpent monsters, plus Link Monster board support
• Turn 1 (going first): Open a searcher (Neptabyss, Mermail Abysspike, Abysteus, Eria) and chain WATER discards to Special Summon a Level 7 finisher into Poseidra Abyss or Abyssgaios
• Turn 2 (going second): Use Ash Blossom and Dominus Impulse or Dominus Spiral to stop the opponent's first summon or effect, then rebuild through the Graveyard engine
• Recovery: Recover from disruption through GY-triggered revivals (Mermail Abyssgunde, Atlantean Heavy Infantry, Abysspike) and searchers that refill the hand
• After siding: Not applicable: the deck has no Side Deck (0 cards) and no post-side plan is available in the evidence

Why it scores here

This 65 comes from the deck as a system: an engine that repeatedly reaches a live WATER starter, a Graveyard loop that rebuilds the hand, and two 2800-3000 ATK Xyz finishers. Consistency is strong because 15 cards carry searcher text and the going-first probability of at least one searcher in five cards is about 0.92 (Inferred). Interaction is a real strength, with three Ash Blossom and four Dominus traps covering the opponent's summons and effects. Conversion and median output are the least certain parts, because the evidence has no parseable recorded boards and the ceiling rests on text reading (Inferred). Popularity, archetype usage and meta share earned no points, and the card scores were not averaged into the deck score.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 66, Going First ≈ 68, Going Second ≈ 66, Meta = provisional, Tournament Reliability ≈ 61. Modifiers: none. Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.34 · 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 engine: 15 searcher-text cards with about 0.92 chance of at least one going first
• Strong interaction suite: Ash Blossom ×3, Dominus Impulse ×2, Dominus Spiral ×2, Triple Tactics ×4
• Two-level finishers: Poseidra Abyss ×3 (3000 ATK) and Mermail Abyssgaios ×2 with an attack-lock effect
• Full legality: all cards Unlimited under the Master Duel ban list

Weaknesses

• No Side Deck, so there is no post-side adaptability
• Several conditional cards (Triple Tactics, Dominus) depend on the opponent acting first
• Five off-engine or generic tech slots dilute the engine
• Single guide with no sections; no recorded boards to validate the engine

Critical choke points

• Each 3-copy starter appears in the opener with probability ≈ 0.34, so a bad opening hand may not reach the first starter
• Poseidra Abyss ×3 is the main finisher; disruption of the Xyz material chain removes the board-ending route
• Ash Blossom and Dominus interaction only works when the opponent activates an effect in the right window

Recommended changes

Evidence & confidence

• Verified: Legal 40 main / 15 extra / 0 side under Master Duel size rules; All 28 distinct names are Unlimited and within copy limits; Extra Deck split: 9 Xyz and 6 Link; Card text for hand traps, searchers and GY effects (from the evidence excerpts)
• Inferred: Opening-hand starter and searcher probabilities from the hypergeometric estimates; Combo ceiling and engine redundancy from card text; Interaction quality and going-second hand-trap value from card text; Pilot-error load from the number of optional triggers
• Provisional: Meta Power (null) and format fit (D13); Going-second and side-deck performance (D12)
• Data gaps: Deck title is null in the export No parseable recorded boards: combo ceiling, median, power distribution and going-first/second split are text-only inference No tournament link: archetype meta-share and match record are absent No win-rate telemetry for this deck or archetype usage_statistics core list does not match Mermail Atlantean (core entries include Droll & Lock Bird, Trishula, Bahamut Shark, Small World and similar), so the reported 8% core presence is unreliable and was not used to score any dimension Only one guide with no sections, and its snippet is a short overview Meta Power is Provisional without a dated metagame sample