Mermail Atlantean Deck #721273 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 69/100 (±6 · Confidence: Medium)

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

Legality

Main 50 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Build a board of high‑ATK WATER monsters (e.g., Poseidra, Moulinglacia, Superancient Deepsea King) using discard‑search engines.; Disrupt opponent with hand traps and floodgate effects while refilling hand with draw engines.
• Turn 1 (going first): Play hand traps (Ash Blossom, Maxx C, Droll) to stall, then use discard‑search monsters (Mermail Abyssteus, Abysspike) to add key WATER monsters and summon a boss monster.
• Turn 2 (going second): With a 6‑card hand, activate hand traps and floodgate (Barrier Statue), then discard‑search or special‑summon engines (Mulcharmy, Deep Sea) to break the opponent’s board and bring out a high‑ATK boss.
• Recovery: Use Maxx C, Droll & Lock Bird, Mulcharmy Purulia/Fuwalos and other draw effects to replenish hand and GY, then re‑activate discard‑search monsters to regain board presence.
• After siding: No side deck; rely on flexible extra‑deck summons (XYZ, Synchro, Link) to adapt to the opponent’s board after the first turn.

Why it scores here

The deck reliably opens with at least one core WATER monster in almost every hand, giving it a strong start. Its many draw and discard‑search engines keep resources flowing, while hand traps and a floodgate protect the board. Interaction density is high thanks to multiple negation and removal tools, and the extra deck offers flexible win‑conditions. However, the lack of a side deck and a modest combo floor keep the overall power from reaching the top tier.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 70, Going First ≈ 68, Going Second ≈ 70, Meta = provisional, Tournament Reliability ≈ 62. Modifiers: none. Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.99 · key two-card combo ≈ — · full-brick estimate ≈ 0.01 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Very high opening consistency
• Strong draw and discard‑search engines
• Robust hand‑trap and floodgate suite
• Flexible extra‑deck with many WATER options

Weaknesses

• No side deck limits adaptability
• Combo floor is modest; no guaranteed high‑damage turn
• Reliance on many tech cards raises decision complexity

Critical choke points

• Moulinglacia requires exactly 5 WATER in GY
• Some key monsters need specific discards (e.g., One for One)
• Hand‑trap activation timing can be fragile against fast decks

Recommended changes

Evidence & confidence

• Verified: Legality status and size counts; Side deck count = 0
• Inferred: Core group hypergeometric probabilities; Hand‑trap and draw engine counts; Interaction card list; Extra‑deck composition
• Provisional: Matchup and meta fit
• Data gaps: no combos supplied — combo floor/median/ceiling is text‑only inference no tournament link — archetype meta‑share and per‑pilot match record absent no win‑rate telemetry exists in YGOVN (going‑first/second, matchup, game‑level, brick/starter/OTK rates) — those signals are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied