Mermail Deck #767489 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±8 · Confidence: Low)

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

Legality

Main 55 / Extra 15 / Side 0 — status: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Atlantis/Mermail/Atlantean board of WATER monsters closing through Poseidra, Moulinglacia, Abyssgaios and Kairyu-Shin-enabled searches (structural read only; no combo evidence); Link and Synchro closers (Neo-Daedalus Rage, Icejade Gymir Aegirine, Deep Sea Prima Donna) if the Extra Deck lands
• Turn 1 (going first): Open a searcher (Neptabyss, Mermail Abyssteus, Atlantean Dragoons, First Penguin) and chain into an Atlantean or Mermail summon; keep Ash Blossom or Droll for the first interruption
• Turn 2 (going second): Use Ash Blossom, Ghost Ogre and Nibiru as hand traps against the opponent's first summon, then rebuild a board through Mermail Shadow Squad and Mulcharmy draws
• Recovery: Recover through searchers (Abyssteus, Abysspike, Neptabyss, Penguin) and the Mulcharmy draw effects, with Abyssgaios as the boss
• After siding: Not evaluable: side_count is 0, so there is no post-side plan

Why it scores here

The list reliably opens a searcher-driven Atlantean/Mermail starter: the archetype-core group has about a 95% chance of at least one card in a 5-card opening hand (proxy, Inferred), and the searcher group has about 87% (Inferred). Its interaction package (Ash Blossom, Droll, Ghost Ogre, Nibiru, Lightning Storm, Feather Duster, Dominus Impulse) is dense, but Ash Blossom and Dominus Impulse are run over the OCG copy limit, so the list is illegal and its score is capped. There are no recorded boards, so the combo ceiling and median are text-only inference and receive no credit beyond the structural read. The score comes from consistency, redundant starters and interaction density on the system, not from the Mermail archetype's usage share or from averaging the card scores. The deck has no side deck, so post-side adaptability earns almost nothing.

Dimension scores

How the score was computed

Strategy profile: 0.85 Midrange + 0.15 Toolbox (not a formula; shown for disclosure). Structural ≈ 52, Going First ≈ 55, Going Second ≈ 50, Meta = provisional, Tournament Reliability ≈ 42. Modifiers: banlist exposure (-6); engine conflicts (-3). Final formula: 0.80*Structural(52) + 0.20*TournamentReliability(42) = 50; context modifiers -9 -> 41; Illegal cap -> 30 (theoretical, structural only). Meta provisional.

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.95 · 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

• Dense searcher package (18 searchers) giving multiple independent opening lines
• Strong interaction density across hand traps, floodgates-by-text and removal (Lightning Storm, Feather Duster, Droll, Dominus Impulse)
• High-ATK closers at 2800-3000 (Poseidra, Moulinglacia, Abyssgaios) with real Extra Deck access

Weaknesses

• Illegal list: two cards over the OCG copy limit
• Low exact-name Mermail purity (7.1%); off-archetype copies dominate the main deck
• No side deck, so no best-of-3 plan
• Several Extra Deck cards in the usage-core list (Levia-Dragon, Call of Atlantis, Daedalus Maelstrom) are absent

Critical choke points

• Ash Blossom and Dominus Impulse are over the copy limit; both must drop to 2 copies before the list is legal
• Extra Deck access to Abyssgaios and Poseidra Abyss depends on a single Xyz Monster and one Atlantean/Mermail material

Recommended changes

Evidence & confidence

• Verified: Illegal: Ash Blossom and Dominus Impulse each run 3 copies against an OCG limit of 2; Main 55 and Extra 15 are within size rules; Side 0 is allowed; Four Limited cards run at 1 copy each (legal); Exact-name Mermail purity 7.1%, off-archetype copies 65
• Inferred: Opening-hand consistency estimates (P>=1 archetype-core ~0.95; searcher ~0.87); Interaction density and resilience from card text; Structural score 52 and going-first/second reads
• Provisional: Meta Power (no dated metagame sample); Matchup and format fit (no tournament link)
• 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: going-first/second, matchup, brick and starter rates are Inferred or Unknown no side deck: best-of-3 post-side cannot be scored usage_statistics flags Abysstrite and Poseidra Abyss as not in deck (in_this_deck false), yet both appear in the extra list; the core-card flags are internally inconsistent Meta Power is Provisional unless a dated metagame sample is supplied