Mermail Deck #773285 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 54/100 (±6 · Confidence: Medium)

• Primary strategy: Midrange
• Secondary strategies: Toolbox, Synchro/Xyz/Link
• Format: ocg

Legality

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

Identity & game plan

• Win condition: Extra Deck boss pressure (Icejade Gymir Aegirine 3000 ATK, Poseidra Abyss 3000 ATK, Azure Ocean Dragon Lord 2900 ATK, White Aura Whale 2800 ATK) enabled by Atlantean/Mermail searcher lines and the Atlantis/Umi package; Attrition through Mulcharmy draw effects (4 copies) and the Raigeki / Harpie's Feather Duster / Daedalus Maelstrom removal package
• Turn 1 (going first): Searcher-driven Atlantean/Mermail line into Extra Deck summons, with Atlantis, City of the Sea Dragon placed to enable Umi-dependent effects
• Turn 2 (going second): Hand traps (Ghost Ogre & Snow Rabbit x3, Droll & Lock Bird x1) to slow the opponent, then Atlantean Dragoons direct-attack pressure and Extra Deck boss summons
• Recovery: Mulcharmy Purulia and Mulcharmy Fuwalos draw effects when the field is empty, plus searchers that refill the hand from the Deck
• After siding: None: the list runs zero Side Deck cards, so there is no post-side plan in the evidence

Why it scores here

The deck is scored as a system: a 20-card searcher density (about 96% chance of at least one searcher in a 5-card opening hand), 4 hand traps, Raigeki, Harpie's Feather Duster and Daedalus Maelstrom, and an Extra Deck with several 2800 to 3000 ATK bosses. Those features raise accessibility, resilience, interaction and closing power. The engine is split across Atlantean, Atlantis/Umi, Mermail, Daedalus and Mulcharmy, with exact-name Mermail purity at 6.9 percent and roughly 14 of 44 Main Deck cards depending on Atlantis or Umi, which lowers consistency and pilotability. The deck runs no Side Deck, so post-side adaptability is scored low and the going-second plan rests on a 45.6 percent chance of a hand trap in six cards. No recorded boards exist, so the combo ceiling and median are text-only inferences, and the popularity of the Mermail archetype was not counted as power.

Dimension scores

How the score was computed

Strategy profile: Midrange, D13 dropped and renormalised to 95 for a meta-neutral structural score. Structural ≈ 61, Going First ≈ 63, Going Second ≈ 57, Meta = provisional, Tournament Reliability ≈ 52. Modifiers: No Side Deck (-3); Engine conflicts across sub-archetypes (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (-5); Meta provisional, D13 dropped and weights renormalised

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.96 · 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

• Legal list with all four Limited singles at legal copies
• High searcher density: about 96 percent chance of at least one searcher in a 5-card opening hand
• Four hand traps plus Raigeki, Harpie's Feather Duster and Daedalus Maelstrom give broad interaction
• Extra Deck bosses at 2800 to 3000 ATK
• Four Mulcharmy draw effects provide recovery

Weaknesses

• Zero Side Deck cards
• Engine split across Atlantean, Atlantis/Umi, Mermail, Daedalus and Mulcharmy (exact Mermail purity 6.9 percent)
• About 14 Main Deck cards depend on Atlantis or Umi
• No recorded boards, so no combo ceiling or median evidence
• Going-second hand-trap coverage is only about 46 percent per six-card hand

Critical choke points

• Atlantis, City of the Sea Dragon (2 copies) and the Umi condition gate many Main Deck effects
• Going-second hand-trap availability (about 46 percent in six cards)
• No side-deck answers to changes in the format

Recommended changes

Evidence & confidence

• Verified: Legal OCG list: 44 Main, 14 Extra, 0 Side within the 40-60 / 0-15 rules; Four Limited singles (Droll & Lock Bird, Harpie's Feather Duster, One for One, S:P Little Knight) run at legal copies; Copy histogram 15 singles, 10 doubles, 3 triples; Card stats and text as listed in evidence cards
• Inferred: Searcher density gives about 96 percent T1 access (hypergeometric proxy); Hand-trap and interaction density drive the interaction score; Umi/Atlantis dependency count of about 14 Main Deck cards; Going-second hand-trap coverage of about 46 percent
• Provisional: Meta Power and matchup fit (no dated metagame sample); Median output (no recorded boards)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and pilot record absent No win-rate telemetry (going-first/second, matchup, brick and starter rates) Meta Power is provisional without a dated metagame sample Side Deck is empty, so post-side performance cannot be assessed