Deep Sea Deck #770714 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 32/100 (±10 · Confidence: Low)

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

Legality

Main 51 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Atlantis/Umi and Daedalus/Atlantean Link and Synchro boards (Levia-Dragon, Neo-Daedalus Rage, Poseidra, Moulinglacia) converting to 2600-3000 ATK attackers; Mulcharmy draw-engine card advantage into large Extra Deck boards
• Turn 1 (going first): Open on Atlantis/Umi starters (Warchief, Advent of Atlantis, Fish Sonar, Neptabyss) and place the field spell or search a Umi-line Link/Synchro (Inferred)
• Turn 2 (going second): Hold Solemn Strike, Ash Blossom, Dominus Impulse and Infinite Impermanence to stop the opponent's board, then rebuild through Mulcharmy draws and Umi recursion (Inferred)
• Recovery: Mulcharmy Fuwalos/Purulia draw plus Warchief and Monster Arms recursion from the GY (Inferred)
• After siding: Not evaluable: the deck runs 0 side cards, so there is no post-side plan

Why it scores here

This list is Illegal: it runs 2 copies of Bahamut Shark, which is Forbidden in OCG, so the score is a theoretical structural read only and is not a normal Final score. Its strongest system feature is interaction: 3 Solemn Strike, 2 Ash Blossom, 2 Dominus Impulse, 2 Infinite Impermanence, Daedalus Maelstrom, Droll and Maxx C give it a layered negation and hand-trap package that carries the going-second and end-board scores. The Atlantis/Umi and Daedalus Link/Synchro lines can reach 2600-3000 ATK boards, and the archetype core is present in 81% of opening hands, which is why the engine-access and closing scores are moderate rather than low. Scoring is on the system: the deck is not rewarded for its popular Deep Sea/Atlantis theme (exact-name purity is 1.5%, with a spread of sub-archetypes), and card scores were not averaged. The main penalties are the illegal Extra Deck slot, zero side cards, no recorded boards, and no meta or tournament data, so the confidence is Low.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 51, Going First ≈ 48, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-6); no Side Deck (-3). Final formula: Illegal list: theoretical structural-only. Final = 0.80*Structural(51) + 0.20*TournamentReliability(40) + ContextModifiers(-9) = 31.8, rounded to 32; Meta provisional

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.81 · 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

• Layered negation and hand-trap package (3 Solemn Strike, 2 Ash Blossom, 2 Dominus Impulse, 2 Infinite Impermanence, Maxx C, Droll)
• Real large-ATK Extra Deck boards (Neo-Daedalus Rage 2900, Icejade 3000, Dragite 3000)
• Archetype core is accessible: P(>=1 core card in opener) about 0.81

Weaknesses

• Illegal as built: 2x Bahamut Shark (Forbidden)
• No side deck, so no adaptability
• Low archetype purity (1.5% exact name) spreads resources across Atlantis, Umi, Daedalus, Mulcharmy and Abyss lines
• 20 Level 0 spell/trap slots and single-copy engine pieces raise brick and dead-draw risk

Critical choke points

• Atlantis, City of the Sea Dragon / Umi on the field gates most of the Umi, Daedalus and Atlantis payoffs
• Only 1 copy of Atlantis, City of the Sea Dragon in the Main Deck
• Bahamut Shark makes the Extra Deck illegal before any play is considered

Recommended changes

Evidence & confidence

• Verified: Illegal status: 2x Bahamut Shark (Forbidden, legal 0); Main 51 and Extra 15 are inside size_rules (40-60 / 0-15); side 0 is legal for OCG; Copy limits for all other cards are met; Archetype core in opening hand is 0.8144 for 14 copies; Archetype purity 1.5% (1 exact-name copy); 0 side cards
• Inferred: Opening-hand engine access (hypergeometric, 5-card and 6-card hands); Interaction density (negation and removal text counts); Going-first and going-second strength split (no recorded boards); Midrange-leaning profile with a Stun secondary
• Provisional: Meta power (no dated metagame sample); Matchup and format fit (no tournament link)
• Data gaps: no combos supplied: combo floor, median and ceiling are text-only inference no tournament link: archetype meta-share and per-pilot records absent no win-rate telemetry (going-first/second, matchup, brick/starter/OTK rates) Meta Power provisional without a dated metagame sample deck title is null; deck identified by id 770714 and archetype Deep Sea