Deep Sea Deck #756359 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

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

Legality

Main 58 / Extra 15 / Side 0 — status: Illegal. 3 violation(s).

Identity & game plan

• Win condition: Xyz/Link board pressure from Atlantean and Mermail engines (Poseidra Abyss, Mermail Abyssgaios, Worldsea Dragon Zealantis, Azure Ocean Dragon Lord - Neo-Daedalus Rage); Synchro beatdown via Deep Sea Prima Donna and Graydle Dragon, with Atlantean Dragoons direct attacks
• Turn 1 (going first): Open a WATER starter (Neptabyss, Mermail Abyssteus, Deep Sea Minstrel, First Penguin) to add or summon the next engine piece, then build a Level 7 or Xyz/Link board; Moulinglacia requires 5 WATER monsters in the GY
• Turn 2 (going second): Use Ash Blossom, Droll & Lock Bird, Maxx C, and Red Reboot to disrupt the opposing turn, then rebuild through the GY-recursion engine; Forbidden floodgates cannot be counted on because they are illegal
• Recovery: Recover through Mermail/Atlantean GY effects and searchers (Abyssteus, Abysspike, Neptabyss, Atlantean Dragoons) that refill the hand from the Deck
• After siding: Not evaluable: the deck has no side deck, so no post-side plan exists in the evidence

Why it scores here

The deck's consistency rests on 3-copy WATER starters (Neptabyss, Mermail Abyssteus, Atlantean Dragoons, First Penguin), which give roughly a 24% chance of at least one per going-first opening hand and a 0.87 chance of at least one searcher-text card; the archetype-core group reaches about 81%, but only 9 of 19 usage-core cards are present, and exact-name purity is just 5.5%, so the engine relies on a loosely connected set of Atlantis, Mermail, Abyss-, and Daedalus cards. No combo boards are recorded, so conversion and floor scores are text-only inference (Inferred) and lower confidence. Interaction is dense (Ash Blossom, Droll & Lock Bird, Maxx C, Red Reboot, Solemn Judgment, Heavy Storm, Harpie's Feather Duster), but two of the strongest disruptors, Barrier Statue and Bahamut Shark, are Forbidden in OCG, which makes the list illegal and caps the score. The 15-card Extra Deck is fully used, but the empty side deck, the missing tournament data, and the absence of any post-side evidence keep the result theoretical; it was not derived by averaging card scores.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 47.2, Going First ≈ 48, Going Second ≈ 42, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist_exposure (-8); illegal_cap (0). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability = 45.8, plus modifiers -8 = 37.8; Illegal cap applied at 30 (theoretical/structural-only, no normal Final Contextual score)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.24 · 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

• Dense hand traps and negations (Ash Blossom, Droll & Lock Bird, Maxx C, Red Reboot, Solemn Judgment)
• Multiple GY-recursion and searcher routes on 3-copy WATER starters
• Full Extra Deck of Xyz, Link, Synchro, and Fusion options with high-ATK bosses

Weaknesses

• Illegal in OCG: Barrier Statue of the Torrent and Bahamut Shark are Forbidden
• Low exact-name purity (5.5%) suggests a loose engine with several sub-archetypes
• No side deck, so no post-side plan or matchup adaptation

Critical choke points

• The Forbidden cards must be removed before the deck can be played at all
• The Atlantean/Mermail starter count depends on 3-copy cards that are often not in the opening hand (about 24%)
• Xyz and Link boards need several specific WATER monsters in the GY or on the field

Recommended changes

Evidence & confidence

• Verified: Legality: 58 Main / 15 Extra / 0 Side; Barrier Statue and Bahamut Shark are Forbidden with 1 copy each; Copy limits and banlist statuses for Limited and Semi-Limited cards are legal as run; Archetype usage: 9 of 19 core cards present
• Inferred: Starter access probabilities from hypergeometric draws; Interaction quality from card text and role tags; Engine connectivity judged from text and archetype spread; Dimension scores D1-D11, D14
• Provisional: Meta health and matchup fit (no dated sample; D13 is provisional); Tournament reliability and post-side estimates
• 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 absent No win-rate telemetry for this deck (going-first/second, matchup, brick/starter rates) No side deck: no post-side evidence Meta Power is Provisional unless a dated metagame sample is supplied