Mermail Deck #771916 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±10 · Confidence: Low)

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

Legality

Main 55 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Extra Deck Link and Xyz boards (Daedalus/Umi Links, Abysstrite, Poseidra Abyss, Mermail Abyssgaios) built off Atlantean and Atlantis searches and Sea Serpent recursion; Going-second hand-trap and negation chains (Ash Blossom, Ghost Belle, Ghost Ogre, Infinite Impermanence) that buy time for the same Extra Deck boards
• Turn 1 (going first): Open a Neptabyss, Mulcharmy, or Atlantean starter, search an Atlantis or Umi enabler, and build toward a Daedalus Link or Abysstrite Xyz. Hand traps are held to answer the opponent's first board. Hand-trap density is high, so a going-first turn often spends them offensively.
• Turn 2 (going second): Hold 2 to 3 interaction cards (Ash Blossom, Ghost Belle, Ghost Ogre, Dimensional Barrier, Droll and Lock Bird) and respond to the opponent's summons, then extend through the Atlantean or Umi board once it is clear.
• Recovery: Mulcharmy draw effects and Atlantean searchers (Mermail Abysspike, Mermail King, Atlantean Dragoons) refill the hand. The Extra Deck is the main recovery resource, since Link and Xyz materials can be reused.
• After siding: Not evaluable. The deck has 0 side cards, so there is no post-side plan. This is a structural gap, not a playing-strength finding.

Why it scores here

The score comes from the deck as a system, not from averaging its card scores. The 22-copy Atlantean, Mulcharmy and Mermail core gives a 0.93 chance of at least one core card in a 5-card opening hand (Inferred hypergeometric estimate), which keeps the engine reasonably accessible. Thirteen hand-trap and negation cards give real end-of-board and going-second interaction, and the Extra Deck supplies Link and Xyz boards with strong ATK. Consistency is held back by the spread across Atlantis, Umi, Daedalus, Abyss-, Mulcharmy and Charmer sub-archetypes (only 2.9% exact-name purity), a 37-card distinct main deck, and no side deck at all. No combo boards were recorded, so the floor and median are text-only inference. Popularity did not earn points: the Mermail archetype's usage statistics confirm the list is real, but do not make it strong. The deck is Illegal (Bahamut Shark and Triple Tactics Talent are Forbidden), so the final score is capped at 30 and labelled structural-only.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 55, Going First ≈ 52, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist exposure (-12); illegal cap (-11); empty side deck (0). Final formula: Illegal cap: uncapped 0.80*Structural(55) + 0.20*TournamentReliability(45) + ContextModifiers(-12) = 41; Illegal deck capped to 30 (structural-only). Meta Power provisional.

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.93 · 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

• Large core of 22 Atlantean/Mulcharmy/Mermail copies gives a high chance of a live starter
• 13 hand traps and 13 negation-text cards give layered going-second interaction
• Extra Deck Link and Xyz options (Daedalus, Abysstrite, Poseidra Abyss) give a strong closing board

Weaknesses

• Illegal: two Forbidden cards (Bahamut Shark, Triple Tactics Talent) are in the list
• No side deck; no post-side plan
• Low archetype purity (2.9% exact name) across 6+ sub-archetypes
• 37 distinct main cards with 23 singletons weakens consistency

Critical choke points

• Forbidden cards must be removed before this list can be played in OCG
• Starter dependence on Atlantean and Mulcharmy searchers; no side deck to recover a bad opening

Recommended changes

Evidence & confidence

• Verified: Deck is Illegal: Bahamut Shark and Triple Tactics Talent are Forbidden in OCG (1 copy each); Main deck 55 and Extra deck 15 are within OCG size rules; side deck is 0; Copy histogram: 23 singletons, 10 pairs, 4 triples; Archetype core group 22 copies; per-card hypergeometric odds computed from the resolved list
• Observed: Usage stats: Mermail and Atlantean core cards appear in 50 to 100% of Mermail-family lists
• Inferred: Starter accessibility (0.93) from hypergeometric estimate; Interaction layering from card text (13 negation and 15 removal text cards); Going-first and going-second scores from text plus probability; Midrange profile chosen because the deck mixes an engine with interaction
• Provisional: Meta Power and matchup fit (D13): no dated metagame or tournament data 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 absent no win-rate telemetry exists in YGOVN for going-first, going-second, matchup or brick rates side deck is empty, so post-side performance cannot be assessed Meta Power is provisional unless a dated metagame sample is supplied