Mermail Deck #764268 — Yu-Gi-Oh! OCG

40 Main, 15 Extra, incl. First Penguin x3, Mulcharmy Purulia x3, Siren Vortex of Atlantis x3. Created Oct 12, 2026 by YGO Mod.

Deck Mermail OCG

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Created by: YGO Mod (20517634)

Created On: 10/12/2026

 
 

Official AI Deck Power Analysis
ComboConfidence: LowEvaluated Oct 31, 2026
34± 10/ 100
Power Score
Structural 50
Reliability 30
Going First 50
Going Second 48

Deck — Deck Power Evaluation

Final Contextual Deck Power: 34/100 (±10 · Confidence: Low)

Overall score Value
Structural Deck Power 50
Going First 50
Going Second 48
Meta Power provisional
Tournament Reliability 30
  • Primary strategy: Combo
  • Secondary strategies: Toolbox
  • Format: ocg

Legality

Main 40 / Extra 15 / Side 0 — status: Illegal. 1 violation(s).

Identity & game plan

  • Win condition: Extra Deck Link/Xyz boards (Azure Ocean Dragon Lord, Levia-Dragoon, Abysstrite, LeVirtue Dragon) built off Atlantis/Umi Level and summon chains; Atlantean and Daedalus Link/Synchro pressure with Poseidra and Levia-Dragon as beaters
  • Turn 1 (going first): Open a searcher (Fish Sonar, Neptabyss, Warchief, First Penguin), place Atlantis or Advent to make Umi, then extend into a Link or Xyz from the Extra Deck
  • Turn 2 (going second): Hold Ash Blossom, Maxx C, Droll & Lock Bird, Infinite Impermanence or Dominus Impulse to stop the first summon, then rebuild from the GY through Atlantean and Umi recursion
  • Recovery: Recover through GY-to-hand searches (Warchief, Dragoons, Monster Arms, Call of Atlantis) and Special Summons back from the GY
  • After siding: Not evaluable: the deck has no Side Deck, so no post-side plan exists

Why it scores here

The deck reliably opens a searcher in hand: the searcher-text group has a 0.95 chance of at least one copy in a 5-card opening hand (Inferred), so the engine is usually reachable on turn one. Conversion depends on Umi and Atlantis activations and the Extra Deck Link and Xyz summons, which the evidence supports only as text, because no recorded boards exist. Interaction is reasonable, with six hand traps and about six tech or removal cards giving layered answers on the opponent's first summon. Structural power was scored on the system (consistency, interaction, and Extra Deck coverage) and not by averaging card scores, and popularity did not earn points. The score is capped low because the list is illegal: Bahamut Shark is Forbidden and runs two copies, and the deck has no Side Deck.

Dimension scores

# Dimension Score Evidence
D1 Engine Accessibility & Consistency 60 Starter-group P(>=1 in 5-card hand) ≈ 0.95 for searchers, but each individual 3-copy starter is only ≈ 0.34; theoretical because the list is illegal (Inferred)
D2 Opening-Hand Quality & Brick Management 50 Most hands carry a searcher or hand trap, but the deck has many single-purpose cards and conflicting Normal Summon routes (Inferred)
D3 Combo Conversion & Ceiling 45 No parseable recorded boards (0 combos), so the ceiling rests on card text such as Umi Level chains and Link/Xyz follow-ups (Inferred)
D4 Combo Floor & Median Output 40 No recorded median or power distribution exists; floor is estimated from text only (Inferred)
D5 Interruption Resilience & Route Redundancy 50 Two independent routes exist (Umi/Atlantis and Atlantean/Daedalus recursion), but no interruption data is recorded (Inferred)
D6 Resource Economy, Recovery & Grind 45 Recursion from GY is present (Warchief, Dragoons, Monster Arms), though no resource signature is recorded (Inferred)
D7 End-Board & Interaction Quality 55 Six hand traps, plus Daedalus Maelstrom and Dominus Impulse for end-board interaction, but layering is untested (Inferred)
D8 Going-Second & Board-Breaking Power 55 Going-second answers exist: Ash Blossom, Maxx C, Droll, and Infinite Impermanence, but no going-second split is recorded (Inferred)
D9 Offensive Pressure & Closing Power 58 Closing boards come from Levia-Dragoon, Poseidra at 2800 ATK, and Azure Ocean Dragon Lord at 2900 ATK, but no end-board ATK data is recorded (Verified stats, Inferred use)
D10 Main Deck Efficiency & Flexibility 50 40 main deck cards with 24 distinct, 55 off-archetype copies by exact name, and a moderate Extra Deck ratio (Verified, Inferred use)
D11 Extra Deck Efficiency & Coverage 60 15 Extra Deck slots with 12 distinct cards across Link, Xyz, Synchro, and Fusion, though Bahamut Shark is a forbidden over-limit slot (Verified)
D12 Side Deck Adaptability 20 No Side Deck at all (0 cards), so post-side adaptability is effectively absent (Verified)
D13 Matchup Coverage & Format Fit 40 No tournament or meta-share context; format fit is provisional (Provisional)
D14 Pilotability & Error Tolerance 50 Multi-step Atlantis/Umi and Extra Deck chains with many decision points, so pilotability is moderate (Inferred)

How the score was computed

Strategy profile: Combo. Structural ≈ 50, Going First ≈ 50, Going Second ≈ 48, Meta = provisional, Tournament Reliability ≈ 30. Modifiers: banlist_exposure (-8); no_side_deck (-4). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional) + ContextModifiers, capped low for an Illegal list

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

  • Searcher density is high (17 searcher-text cards), so the engine reliably finds a starter
  • Six hand traps plus removal/negation give layered interaction on both turns
  • Extra Deck is well-covered across Link, Xyz, Synchro, and Fusion summons

Weaknesses

  • Illegal list: Bahamut Shark is Forbidden and over the copy limit
  • No Side Deck, so there is no post-side plan
  • Off-archetype spread: exact Mermail purity is 0%, and the deck is mostly Atlantis/Umi/Daedalus cards

Critical choke points

  • Umi/Atlantis activation on the field gates most of the engine
  • Bahamut Shark slots are dead cards in-format and would need to be replaced
Priority Remove Add Reason
1 Bahamut Shark x2 Legal Extra Deck Xyz or Link (for example Levia-Dragoon already run, or a second Abysstrite) Fixes the only legality violation; the deck cannot be scored as legal without it
2 One copy of Maxx "C" or Droll & Lock Bird Side Deck of 15 with hand traps and Ash/Dominus copies Creates a Side Deck and a post-side plan; the current Side slot is empty

Evidence & confidence

  • Verified: Bahamut Shark is Forbidden and runs 2 copies (violation); Main 40, Extra 15, Side 0 counts; Card stats and text for all 40 Main and 15 Extra cards; Restricted card counts for Limited and Semi-Limited cards are legal
  • Inferred: Opening-hand starter probabilities from the hypergeometric table; Interaction density from hand trap and negation text; Combo ceiling and floor read from card text, not recorded boards
  • Provisional: Meta Power and format fit, since no dated metagame sample exists
  • Data gaps: Deck is Illegal, so no normal Final score is possible; the score is structural and theoretical only No recorded combos (0 boards), so combo floor and ceiling are text-only inference No Side Deck (0 cards), so post-side scoring is absent No tournament link: archetype meta-share and pilot results are absent No win-rate telemetry exists in YGOVN Meta Power stays Provisional without a dated metagame sample Deck is labelled Mermail, but no Mermail-named card is run (exact purity 0%)
Generated by deck-evaluation-skill/lean-v1· run 202610302100
 
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