Mermail Deck #767808 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 58/100 (±8 · Confidence: Medium)

• Primary strategy: Combo
• Secondary strategies: Toolbox, Stun
• Format: ocg

Legality

Main 44 / Extra 14 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Synchro, Xyz and Link pressure from the Atlantean/Umi/Mermail engine, closing through Poseidra, Azure Ocean Dragon Lord and Abysstrite style boss monsters; Direct attacks from Atlantean Dragoons and recursion-driven board refills from the Graveyard
• Turn 1 (going first): Search and summon Neptabyss, Abyssteus, Abysspike or First Penguin, place Atlantis or Advent of Atlantis, then build a Synchro, Xyz or Link into the Extra Deck boss
• Turn 2 (going second): Use Ghost Ogre and Snow Rabbit, Droll and Lock Bird and Ghost Ogre hand-trap interaction to slow the opponent, then rebuild through Atlantean and Mermail searchers
• Recovery: Graveyard effects of Atlantean Dragoons, Mermail Shadow Squad, Warchief of Atlantis and Abyssrhine re-summon monsters and re-add searchers
• After siding: Not evaluable: the deck has no side deck, so there is no post-side plan

Why it scores here

The deck reliably opens a functional plan: 26 archetype-core copies give about a 99% chance of at least one in a 5-card opener, and 20 searcher-text cards give about 96%, so the engine is almost always live (Inferred). It converts that plan through a 14-card Extra Deck of Synchro, Xyz and Link bosses with 2800 to 3000 ATK ceilings, but the ceiling is text-only because no recorded boards exist. It survives disruption through four hand traps, several Graveyard recursion effects and multiple starter routes, and its end-board interaction is broad (Raigeki, Feather Duster, Daedalus Maelstrom, Monster Arms, Virtue Stream, Call of Atlantis). Popularity did not earn points: archetype usage statistics only confirm the list is real and accessible, and the score was built from the system, not from averaging card scores. The deck is held back by having no side deck, no tournament or meta context, and no going-second or post-side evidence.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 66, Going First ≈ 69, Going Second ≈ 64, Meta = provisional, Tournament Reliability ≈ 58. Modifiers: Banlist exposure (hand trap at 1 copy) (-1); No side deck (-3); Engine conflict (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional, no dated sample)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.99 · 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

• Archetype core is present in almost every opener (about 99 percent, Inferred)
• Heavy searcher density (20 cards) keeps the engine live and redundant
• Broad interaction package: four hand traps, Raigeki, Feather Duster, Daedalus Maelstrom, Virtue Stream, Call of Atlantis
• High-ATK Extra Deck bosses with direct-attack and recursion support

Weaknesses

• No side deck, so no post-side adaptation
• No combo or tournament data, so ceiling and median are text-only
• Mulcharmy cards conflict with an empty-field requirement
• Long multi-step Synchro, Xyz and Link sequencing lowers pilot tolerance

Critical choke points

• Starter access depends on Neptabyss or Atlantean Dragoons (31 percent each in a 5-card opener)
• Extra Deck boss access depends on a valid Synchro, Xyz or Link material set

Recommended changes

Evidence & confidence

• Verified: Legal OCG status, 44 Main and 14 Extra, zero side; Four Limited cards each at one copy, within legal limits; Card text and stats from the resolved card list; Archetype usage inclusion percentages
• Inferred: Hypergeometric opening-hand access (archetype core, searchers, starters); Interaction and recursion reads from card text; Consistency, brick and pilotability estimates; Structural and final score bands
• Provisional: Meta Power and D13 matchup fit (no dated metagame sample); Going-second and post-side estimates (no win-rate data)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record absent No win-rate telemetry for going-first, going-second, matchup or brick rates Meta Power is provisional without a dated metagame sample Usage statistics mark Abysstrite, LeVirtue Dragon, Mermail Abyssgaios, Poseidra Abyss and Marincess Coral Anemone as not in this deck, but the card list shows each at one copy in the Extra Deck; the card list was treated as source of truth No side deck exported, so D12 rests on an absent side