Deep Sea Deck #768394 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±10 · Confidence: Low)

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

Legality

Main 56 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Extra Deck Atlantean/Mermail/Abyss-style Xyz, Synchro and Link beaters (Poseidra Abyss, Abysstrite, Mermail Abyssgaios, Mermail King - Neptabyss) built from searched Atlantean and Mermail engine monsters; Direct-attack pressure from Atlantean Dragoons and Sea Serpent monsters, with Poseidra, the Storming Atlantean as a 2800 ATK beater
• Turn 1 (going first): Open on Neptabyss, Mermail Abyssteus or Mermail Abysspike for a search into the Atlantean/Mermail engine, protect the starter with Ash Blossom and Infinite Impermanence, then move to a Level 7 or higher Extra Deck monster
• Turn 2 (going second): Hold hand traps (Ash Blossom, Evenly Matched, Infinite Impermanence, Dominus Impulse, Solemn Warning) to answer the opponent's first summon, then continue through Mulcharmy or Atlantean searches
• Recovery: Recover through GY effects of Atlantean and Mermail monsters (Atlantean Heavy Infantry, Mermail Abyssteus, Abysspike, Butterfly Fish) and Mulcharmy draw effects
• After siding: No side deck is registered, so no post-side plan can be evaluated

Why it scores here

The deck is scored as a system, not as an average of its card scores. Its searchers (17 searcher-text cards, about 85% chance of at least one in a 5-card opening hand) and the archetype core give it a reasonable chance of going live on turns 1 and 2, but the engine is spread over several sub-archetypes (Atlantean, Mermail, Abyss-, Mulcharmy, Penguin) with only 2.8% exact Deep Sea purity, which weakens engine coherence. Nine hand traps, three Solemn-style negates and about 15 removal or negation effects give it solid interaction on the end board, and its Extra Deck (Poseidra Abyss, Abysstrite, Mermail Abyssgaios, Mermail King - Neptabyss) supplies real closing power. Combo conversion, floor and median output cannot be measured because no boards were recorded, so those scores are text-only inference. Popularity was not credited: the archetype usage data confirms the list is real, but it does not raise the score. The deck is Illegal (Ash Blossom and Dominus Impulse each run 3 copies against a limit of 2), so the score is capped and the evaluation is theoretical and structural only.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 54, Going First ≈ 55, Going Second ≈ 60, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist exposure (-5); engine conflicts (-3); weak post-side plan (-3). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers = 0.80*54 + 0.20*45 - 11 = 41, then Illegal cap applied, final score 30 (theoretical/structural-only; Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.85 · 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

• Searcher density (17 texts) and archetype core presence give high starter access (Inferred)
• Layered interaction: 9 hand traps plus Solemn-style negates and removal (Inferred)
• Extra Deck closing power reaches ATK 3000 (Verified stat)

Weaknesses

• Illegal list: Ash Blossom and Dominus Impulse each run 3 copies against a limit of 2 (Verified)
• Low exact archetype purity (2.8%) and 9 singletons weaken engine coherence (Verified count)
• No side deck, so no post-side plan (Verified count)
• No combo or tournament data, so floor and median are unmeasured (Verified gap)

Critical choke points

• The Atlantean/Mermail searcher chain relies on a few starters (Neptabyss, Mermail Abyssteus, Mermail Abysspike), so losing them to a hand trap or Solemn line stalls the engine (Inferred)
• Ash Blossom and Dominus Impulse must be cut to 2 copies before the list can be scored normally (Verified)

Recommended changes

Evidence & confidence

• Verified: Legality: Ash Blossom and Dominus Impulse each over the Semi-Limited limit (3 vs 2); Main 56 and Extra 15 are within size rules; Side 0 is within [0,15]; Exact archetype purity 2.8% and 69 off-archetype copies; Searcher-text group count 17; archetype core group 27 copies
• Observed: Usage statistics confirm Atlantean Dragoons and Mulcharmy Purulia as high-inclusion core cards (usage data)
• Inferred: Engine access about 0.85-0.97 from hypergeometric estimates; Interaction quality from negate and removal text; Going-second hand-trap and Solemn profile; Pilotability from chain complexity
• Provisional: Meta Power and D13 matchup fit (no dated sample or tournament data)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot match record are absent No win-rate telemetry: going-first/second, matchup and brick/starter rates are Inferred or Unknown No side deck registered: post-side adaptability cannot be measured Meta Power is Provisional unless a dated metagame sample is supplied