Deep Sea Deck #693154 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 25/100 (±10 · Confidence: Low)

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

Legality

Main 41 / Extra 15 / Side 0 — status: Illegal. 3 violation(s).

Identity & game plan

• Win condition: Extra Deck boards built from Atlantean, Mermail and Abyss- Xyz/Synchro/Link monsters (Poseidra Abyss 3000 ATK, Swordsoul Supreme Sovereign - Chengying 3000 ATK) reached through searcher text (Inferred from card text only); Direct-attack and extra-attack text on Atlantean Dragoons and Mermail Abyssmegalo (Inferred)
• Turn 1 (going first): Search and special-summon engine through Neptabyss, Mermail Abyssteus and Atlantean Dragoons toward a Level 7 Extra Deck summon (Inferred, no recorded lines)
• Turn 2 (going second): Use hand traps (Ash Blossom, Maxx C, Droll and Lock Bird) to slow the opponent, then rebuild through Mermail and Atlantean searches (Inferred)
• Recovery: GY-trigger effects of WATER monsters (Mermail Abysspike, Atlantean Heavy Infantry, Mulcharmy Purulia) to re-search and re-summon (Inferred)
• After siding: Not assessable: no Side Deck was submitted

Why it scores here

The deck reliably opens a starter in the 5-card opening hand (about 0.84 for the 12-copy archetype core, and about 0.91 for at least one searcher-text card), so its engine is accessible on paper (Inferred). Its ceiling and median cannot be measured because no combo boards were recorded, so conversion and floor scores are text-based estimates and carry low weight. The deck has a real hand-trap and summon-redundancy profile, and its Extra Deck contains several 2800-3000 ATK boards, which supports the offensive and interaction dimensions. Score is not built from card averages, and popularity of the Deep Sea name did not earn points: only 2 of 56 copies carry the exact archetype name. The list is Illegal (Sekka's Light at 3 copies and two Forbidden cards), so the 25 is a structural-only cap and not a normal contextual score.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 49.3, Going First ≈ 56, Going Second ≈ 48, Meta = provisional, Tournament Reliability ≈ 42. Modifiers: Banlist exposure (-5); Engine conflicts (-4). Final formula: Illegal cap: raw 0.80*49.3 + 0.20*42 = 47.8, plus modifiers -9 = 38.8, capped to 25 as theoretical/structural-only because the list is Illegal; Meta provisional (null)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.84 · key two-card combo ≈ — · full-brick estimate ≈ 0.16 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Dense searcher text (15 cards) and redundant summon routes make the engine reachable in the opening hand
• Extra Deck contains several 2800-3000 ATK boards with board-control text
• Four hand traps and removal text give interaction on both turns

Weaknesses

• The list is Illegal: copy-limit and Forbidden violations must be fixed before any normal score applies
• Only 2 of 56 copies carry the exact archetype name, so the engine is a stitched mix of sub-archetypes
• No recorded boards, no side deck, and no tournament data

Critical choke points

• Any copy-limit or Forbidden violation makes the list illegal, so the deck cannot be played as built
• The Atlantean and Mermail engine depends on WATER monsters in the GY, which Winged Dragon of Ra - Sphere Mode and Mulcharmy cards do not supply

Recommended changes

Evidence & confidence

• Verified: Legality: Illegal, with Sekka's Light at 3 copies (limit 1) and two Forbidden cards (Barrier Statue of the Torrent, Bahamut Shark); Main Deck 41 cards and Extra Deck 15 cards, both within the OCG size rules; Card text for the listed cards (from the evidence excerpts); No Side Deck; no tournament link; no combo boards
• Inferred: Opening-hand starter probability 0.84 for the archetype core; Hand-trap probability 0.48 in a going-second 6-card hand; Engine consistency and brick-risk estimates from composition; Going-first and going-second plans derived from card text only
• Provisional: Meta Power (null) and archetype matchup fit, since no dated metagame sample exists
• Data gaps: Illegal list: copy-limit and Forbidden violations mean no normal contextual score applies No combos supplied; combo floor, median and ceiling are text-only inference No tournament link; archetype meta-share and per-pilot records are absent No Side Deck supplied; post-side plan cannot be scored No win-rate telemetry exists in YGOVN; going-first and going-second splits are unknown Data inconsistency: usage_statistics marks several Extra Deck cards (for example Abysstrite, Deep Sea Prima Donna, Marincess Coral Anemone) as in_this_deck false, but the cards list includes them in the Extra Deck