Mermail Deck #768094 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

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

Legality

Main 43 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Atlantean/Mermail summon chains into high-ATK Extra Deck boss monsters (Poseidra Abyss, Mermail Abyssgaios, Levia-Dragoon, Neo-Daedalus Rage) from the Extra Deck; Direct attacks from Atlantean Dragoons and Level 3 or lower Sea Serpent monsters, backed by Poseidra's protection
• Turn 1 (going first): Opening starter (Neptabyss, Mermail Abysspike, Mulcharmy draw engine, or Atlantis field) to search and extend into an Extra Deck boss; the 3-copy hand traps are not available on the play
• Turn 2 (going second): Ash Blossom and Dominus Impulse as interaction against the opponent's first summon or search, then the same Atlantean/Mermail engine to rebuild the board
• Recovery: GY-triggered recursion from Atlantean Dragoons, Mermail Abysteus, Mermail Abysspike, and Atlantean Heavy Infantry, plus Mulcharmy draw effects to refill the hand
• After siding: Not evaluable: the deck runs no Side Deck, so there is no post-side plan

Why it scores here

The deck's engine is reasonably accessible: the archetype-core group is present in about 99.5% of opening hands by the hypergeometric estimate, so the Atlantean/Mermail starters usually show up on turn 1 (Inferred). Its closing power is the strongest part, since the Extra Deck carries several 2800 to 3000 ATK bosses and recursion through Dragoons, Abysteus and Abysspike keeps the line going after a clean interruption. Interaction is real (9 negation-text and 11 removal-text cards, plus Ash and Dominus) but the Illegal copy counts for those two cards cap the list, and the 52 off-archetype copies (10.3% exact-name purity) show an engine mixing several sub-archetypes rather than one coherent plan. No combo boards, no tournament data and no Side Deck exist, so the floor, median and matchup reads are Provisional, and the Structural score was not built from averaging card scores. Popularity in the archetype stats does not add points, and the Illegal list is capped to a low theoretical score.

Dimension scores

How the score was computed

Strategy profile: Combo (primary), Midrange (secondary). Structural ≈ 55, Going First ≈ 52, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-8); engine conflicts (-4); illegal-list cap (-10). Final formula: No reliable metagame: 0.80*Structural(55) + 0.20*TournamentReliability(40) = 52; context modifiers total -12 gives 40; capped to 30 because the list is Illegal (Ash Blossom and Dominus Impulse over the Semi-Limited limit), so the score is theoretical/structural-only

Probability & combo summary

• Opening a starter: P(≥1) ≈ 1 · 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 group is present in about 99.5% of opening hands (Inferred from hypergeometric draw odds)
• Extra Deck carries several 2800 to 3000 ATK bosses with recursion lines in the GY
• Interaction density is high: 9 negation-text and 11 removal-text cards plus 3 hand traps

Weaknesses

• Illegal as submitted: Ash Blossom & Joyous Spring and Dominus Impulse are each run 3 times against a limit of 2
• Low exact-name purity (10.3%) with 52 off-archetype copies, so the engine splits across several sub-archetypes
• No Side Deck, so there is no post-side plan and no way to adapt to a matchup

Critical choke points

• The Atlantean and Mermail starters that open the engine depend on a few 3-copy cards that are each about 32% likely to be in an opening hand of 5
• Extra Deck boss summons depend on specific Level 7 and Xyz material chains that a single disruption can break

Recommended changes

Evidence & confidence

• Verified: Legality: Ash Blossom & Joyous Spring and Dominus Impulse each run 3 copies against a Semi-Limited limit of 2 (OCG BanList); Main deck 43 cards (within 40 to 60), Extra 15 (within 0 to 15), Side 0 (within 0 to 15); Card text and stats for the 37 distinct cards are from the resolved card data; Exact-name archetype purity 10.3% (6 of 58 archetype-tagged copies)
• Inferred: Starter consistency from hypergeometric odds (0.9955 archetype-core group; 0.3164 per 3-copy starter); Structural dimension scores D1 to D14 from card text and composition; Interaction density from negation and removal text roles
• Provisional: Matchup fit (D13) and tournament reliability, since no tournament link or dated meta sample exists; Side Deck adaptability (D12), since no Side Deck is present
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record are absent No win-rate telemetry exists in YGOVN (going-first/second, matchup, brick/starter rates) Meta Power is Provisional unless a dated metagame sample is supplied The deck runs 0 Side Deck cards, so there is no post-side evidence Deck title is null in the export