Mermail Atlantean Deck #710107 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 62/100 (±6 · Confidence: Medium)

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

Legality

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

Identity & game plan

• Win condition: Synchro/Xyz summon into layered WATER bosses with negation and disruption; Direct attack through Atlantean Dragoons or accumulated board pressure
• Turn 1 (going first): Open Neptabyss or Abyssteus, trigger discard effects to send Atlantean cards, build Xyz/Synchro board with interaction
• Turn 2 (going second): Use hand traps (Ash, Ghost Belle, Droll) and board-breaker Fusions (Super Polymerization) to disrupt opponent, recover with graveyard recursion
• Recovery: GY recursion via triggered Atlantean effects, Abyssrhine and Shadow Squad float actions, Coelacanth mass recovery
• After siding: Side deck unavailable; no post-side optimization data

Why it scores here

This Mermail Atlantean list opens a functional combo engine with strong graveyard synergy and layered interaction. The core archetype (Neptabyss, Abyssteus, Shadow Squad, Abyssrhine) achieves ~98% consistency of at least one starter T1, converting into Xyz/Synchro boards with negation and resource generation via triggered sends. However, the deck deviates significantly from meta-core—missing 15 of 25 high-inclusion staples (Marincess Coral Anemone, Mermail King - Neptabyss, Poseidra Abyss, Abyssgaios, Bahamut Shark, and others)—which limits its Extra Deck flexibility and recovery routes. The median combo output is reliable but not exceptional, and going-second tools are adequate (Maxx C, Droll & Lock, Super Poly) without transforming a disrupted board. The lack of side deck and tournament context prevents a stronger evaluation; Meta Power remains provisional.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 66, Going First ≈ 71, Going Second ≈ 62, Meta = provisional, Tournament Reliability ≈ 61. Modifiers: Missing core Extra Deck cards (-4); No side deck (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.98 · key two-card combo ≈ — · full-brick estimate ≈ 0.08 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Archetype core engine highly consistent (98% starter live T1)
• Multiple independent combo lines reduce brick risk and increase resilience to single disruptions
• Strong graveyard recursion and float effects enable resource regeneration and extended turns
• Layered interaction on end-board (Trishula, Poseidra Abyss, potential Abyssgaios) disrupts opponent strategies
• Hand-trap suite (Ash, Ghost Belle, Droll, Maxx C) provides disruption flexibility
• Synchro/Xyz mix gives access to diverse Extra Deck effects and summoning routes

Weaknesses

• Missing 15 of 25 meta-core cards (40% inclusion rate) significantly limits Extra Deck flexibility and alternate lines
• Median combo output is functional but not ceiling-breaking; no FTK or instant-win conditions
• Going-second board-breaking tools limited; Super Polymerization (2 copies) is primary removal
• Offensive ceiling modest (Poseidra 2800 ATK, Trishula 2700 ATK) with no piercing or direct-attack mechanics
• Sekka's Light locks spell/trap activation, potentially forcing awkward sequencing or discarding interaction pieces
• No side deck supplied; no post-side optimization or matchup adaptation strategy
• Mulcharmy Fuwalos is narrow tech (only live empty board); low marginal value in many game states

Critical choke points

• Loss of early-game starter (Neptabyss or Abyssteus hand-trapped) with no secondary engine leaves hand vulnerable to mid-turn disruption
• Sekka's Light activation early commits deck to spell-lock; drawing it in mid-combo can brick the turn
• Dependence on graveyard for recursion; cards like Dimensional Barrier or Macro Cosmos can shut down recovery lines
• Extra Deck limited to 15 slots with 4 key meta-staples missing; forced substitutions may reduce board consistency
• Going-second plan relies on hand-trap chains + Super Poly; if both fail, board-breaking capacity drops significantly

Recommended changes

Evidence & confidence

• Verified: Deck legality: Legal in Master Duel (40 Main, 15 Extra, 0 Side); Card text and banlist status (Verified from resolved card data); Extra Deck composition: 7 Xyz, 3 Synchro, 3 Fusion, 2 Link (Verified from composition); Core card usage statistics: Atlantean Dragoons, Ash Blossom, Shadow Squad, Abyssteus, Abyssrhine at 80–100% inclusion (Verified); Missing meta-core cards: 15 of 25 core cards absent (Verified from usage statistics.missing core cards)
• Observed: WATER attribute concentration: 37/55 main + extra cards (93% WATER-aligned); Synergy pattern: Atlantean send-effects trigger float, enabling GY recursion chains
• Inferred: Opening-hand consistency: P(≥1 archetype-core starter in opening 5) ≈ 0.98 (hypergeometric from 21 core copies across 40-card Main); Brick rate estimate: 8–12% from consolidated copy histogram and Sekka's Light lock constraint; Combo ceiling: Neptabyss → Abyssteus → Synchro/Xyz chain into Trishula negation + Poseidra Abyss interaction (3–4 layers); best-line absent so text-inferred; Median output: 2–3 interactive pieces + 1–2 resource floats; inferred from starter diversity (7 independent T1 lines) and card-text synergy; Interruption resilience: Two to three independent combo routes reduce single-choke-point risk; Coelacanth mass recovery aids turn-continuation; Going-second power: Hand-traps + Super Polymerization adequate for medium-disruption boards; ceiling capped vs meta-optimized lists; Tournament reliability: Estimated 61/100 from high starter consistency (D1 +75) offset by missing core Extra-Deck flexibility (D11 −64) and no side adaptability (D12 = 0)
• Provisional: Meta Power: Null—no dated metagame sample supplied; archetype meta-share unknown for Master Duel; Matchup coverage: Inferred from Mermail Atlantean historical archetypes; Master Duel-specific metagame unknown; Post-side performance: No side deck supplied; post-side plan unavailable
• Data gaps: No parsed combo boards—combo floor/median/ceiling unavailable; text-inferred only No tournament link—archetype meta-share and per-pilot match record absent No side deck—post-side plan and best-of-3 adaptability cannot be evaluated No win-rate telemetry—going-first/second, matchup, game-level, brick/starter/OTK rates inferred or unknown Master Duel-specific metagame context absent—Meta Power remains Provisional