Mermail Deck #752165 — Yu-Gi-Oh! TCG

Deck — Deck Power Evaluation

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

• Primary strategy: Midrange
• Secondary strategies: Toolbox
• Format: tcg

Legality

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

Identity & game plan

• Win condition: Extra Deck boss monsters (Poseidra Abyss, Mermail Abyssgaios, Swordsoul Supreme Sovereign - Chengying) built from the Atlantean/Mermail/Abyss-/Mulcharmy engine; Direct attacks from Atlantean Dragoons and Sea Serpent Level 3 or lower monsters, plus Mermail King - Neptabyss and Marincess Coral Anemone link pressure
• Turn 1 (going first): Open a WATER starter (Neptabyss, Abyssrhine, Mermail Abyssteus, Mermail Shadow Squad) that searches a second Atlantean/Mermail piece, then Xyz or Synchro into a boss while holding Ash Blossom and Dominus Impulse for protection
• Turn 2 (going second): Hand traps (Ash Blossom, Droll & Lock Bird, Dominus Impulse) to break the opponent's first summon, then rebuild the WATER engine through the GY
• Recovery: Recycle WATER monsters from the GY through Mermail Abysspike, Atlantean Heavy Infantry, Deep Sea Minstrel and Mulcharmy draw effects
• After siding: Not evaluable: the deck runs no Side Deck cards, so there is no post-side plan

Why it scores here

The deck is capped because it runs three copies each of Ash Blossom & Joyous Spring and Dominus Impulse when the TCG limit is two, so it is scored as a theoretical structural read only. Its main strengths are a WATER engine with 94% archetype-core presence in opening five and a searcher-text group that is live in 83% of openings, which lifts engine access (D1) to about 62 (Inferred). Interaction is dense (Ash, Droll & Lock Bird, Dominus Impulse, Anti-Magic Arrows, Gameciel, Called by the Grave), which earns the endboard score (D7 about 65). Combo conversion (D3) and median output (D4) are only text-inferred because no recorded boards exist, so they stay near the middle. Popularity and the Mermail/Atlantean usage data confirm the list is real but were not credited as power, and the deck was not scored as an average of card scores. The Side Deck is empty, so the going-second and post-side plan carry no credit beyond the main-deck hand traps.

Dimension scores

How the score was computed

Strategy profile: Midrange profile used; Toolbox secondary disclosed only, not blended. Structural ≈ 55, Going First ≈ 55, Going Second ≈ 50, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Illegal copy-limit cap (-23). Final formula: Illegal list: normal 0.80*Structural + 0.20*TournamentReliability (= 53) is not reported; capped to 30 as a theoretical/structural-only read because of copy-limit violations

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.94 · key two-card combo ≈ — · full-brick estimate ≈ 0.06 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Dense WATER engine with high archetype-core access in opening five
• Layered interaction: five hand traps plus removal and negation text
• Two 3000-ATK closing bosses in the Extra Deck
• Extra Deck fully used with 15 cards across Xyz, Synchro and Link

Weaknesses

• Illegal as built: Ash Blossom and Dominus Impulse exceed the Semi-Limited limit
• Exact-name archetype purity is only 10%, diluting consistency
• Empty Side Deck gives no post-side plan
• No recorded boards, so the combo ceiling and median cannot be verified

Critical choke points

• Ash Blossom and Dominus Impulse are the main protection, and the over-limit copies make the list illegal until one copy of each is removed
• WATER monster recycle through the GY is the sole recovery route

Recommended changes

Evidence & confidence

• Verified: Main Deck 55 cards, Extra 15, Side 0; legal size range met; Ash Blossom & Joyous Spring 3 copies vs legal 2 (over limit); Dominus Impulse 3 copies vs legal 2 (over limit); Archetype-core probability 0.9421 and searcher-group 0.8345 from the hypergeometric estimate
• Observed: Archetype-core usage stats: 11 of 25 core cards present (44%)
• Inferred: Engine consistency and brick rate from hypergeometric estimates and card text; Interaction quality from card text and role tags; Going-second hand trap value from hand6 probability 0.4518
• Provisional: Meta Power (null) and matchup fit (D13) without a dated metagame sample
• 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/second, matchup or brick/starter rates Meta Power is Provisional unless a dated metagame sample is supplied deck title is null