Mermail Deck #771742 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 35/100 (±10 · Confidence: Low)

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

Legality

Main 55 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Atlantean/Mermail boards (Poseidra, Mermail Abyssgaios-style Xyz and Link beaters such as Neo-Daedalus) that pressure through hand-trap-protected starts; direct-attack and Umi pressure are secondary; Lightning Storm and Harpie's Feather Duster backrow wipes with Atlantean bodies closing the game
• Turn 1 (going first): Open Neptabyss / Mermail Abyssteus / First Penguin to search an Atlantean or Mermail boss, then extend through Atlantean Dragoons and Mulcharmy Purulia draw triggers
• Turn 2 (going second): Use Ash Blossom, Ghost Ogre, Droll & Lock Bird, Dominus Impulse and Nibiru to stop the opponent's first Special Summon line, then rebuild a board from the GY
• Recovery: Recursion through Mermail/Atlantean GY effects (Abysspike, Shadow Squad, Dragoons) and searchers (Neptabyss, Abyssteus) to restock the hand after a board wipe
• After siding: No side deck is registered, so there is no post-side plan; the deck cannot adapt between games

Why it scores here

The deck is scored as a system, not as an average of its cards. Its archetype core (26 copies across Neptabyss, Abyssteus, Dragoons, Purulia and Mulcharmy) is present in about 97% of opening 5-card hands (Inferred), and 19 searcher-text cards plus 8 hand traps give it real redundancy against one interruption. The ceiling and median are both unmeasured because no recorded boards exist, so combo output is an Inferred text-only estimate that stays moderate. Interaction is broad (Ash Blossom, Droll, Ghost Ogre, Dominus Impulse, Lightning Storm, Harpie's Feather Duster), but the list is mostly off-archetype (7% exact-name purity), so the engine is less coherent than its popularity suggests. Popularity and usage stats only confirm the list is real and accessible; they did not earn points. The score is capped low because two cards exceed the OCG copy limit, and the deck has no side deck.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 52.1, Going First ≈ 50, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 50. Modifiers: Banlist exposure (-8); No side deck (-4). Final formula: Structural 52.1 (Midrange). Context-adjusted 0.80*52.1 + 0.20*50 - 12 = 29.7 before cap; Illegal deck capped at 35 (theoretical/structural-only, not a normal Final Contextual score). Meta provisional.

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.97 · 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

• Core archetype density of about 97% in opening 5-card hands (Inferred)
• Multiple searchers and recursion routes that restock the hand (Inferred)
• Broad hand-trap and backrow interaction covering the first Special Summon and Spell/Trap lines (Inferred)

Weaknesses

• Two cards exceed the OCG copy limit, so the list is illegal as built (Verified)
• No side deck, so no adaptation between games (Verified)
• Low exact-archetype purity with 65 off-archetype copies weakens engine coherence (Verified count)

Critical choke points

• Neptabyss and Abyssteus as the main starter/searcher pair; losing both early leaves few reliable starters (Inferred)
• Two over-limit cards (Ash Blossom, Dominus Impulse) must be cut to 2 copies before the list is playable (Verified)

Recommended changes

Evidence & confidence

• Verified: Legality status Illegal: Ash Blossom and Dominus Impulse exceed the Semi-Limited copy limit; Main 55, Extra 15, Side 0 within OCG size rules; Exact-name archetype purity 7.1% (5 of 70 copies); Usage stats: archetype core cards present 13 of 25 standard cards
• Observed: No recorded boards or combo outputs were supplied
• Inferred: Opening 5-card hand has about 0.97 chance of at least one archetype core card; Hand-trap availability on going second is about 0.63; Consistency and interaction breadth scored from card text, not measured games; Combo ceiling and median are text-only estimates
• Provisional: Meta Power and matchup or format fit (no dated metagame sample or tournament link)
• Data gaps: no combos supplied, so combo floor/median/ceiling is text-only inference no tournament link, so archetype meta-share and per-pilot match record are absent no win-rate telemetry in YGOVN for going-first/second, matchup, or brick/starter rates Meta Power is Provisional without a dated metagame sample No side deck registered, so post-side adaptability cannot be measured