Umi Deck #772803 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 25/100 (±8 · Confidence: Low)

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

Legality

Main 40 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Atlantis/Umi Link and Xyz boards (Azure Ocean Dragon Lord - Neo-Daedalus Rage, Levia-Dragoon - Daedalus, Levia-Dragon of Atlantis - Daedalus, Brionac) converting Umi field-based summons into 2000-2900 ATK attackers (Inferred from card text); Toadally Awesome and LeVirtue Dragon Xyz boards after Atlantis recursion from the GY (Inferred from card text)
• Turn 1 (going first): Open Atlantis, City of the Sea Dragon or a Fish Sonar / Advent of Atlantis searcher line, then Warchief of Atlantis or Siren Vortex of Atlantis to set Umi and reach a Link or Synchro Summon (Inferred)
• Turn 2 (going second): Hold Ash Blossom, Droll and Lock Bird, Infinite Impermanence or Maxx C to answer the opponent's first summon or search, then rebuild the Umi engine from the GY (Inferred)
• Recovery: Atlantis-tagged monsters in the GY (Warchief, Monster Arms of Atlantis, Levia-Dragon) are special-summonable back onto the field, so the deck can rebuild after a single interruption (Inferred)
• After siding: No side deck is registered, so there is no post-side plan. The deck cannot be scored for side adaptability.

Why it scores here

This list is Illegal because it runs two copies of Bahamut Shark, which is Forbidden in OCG, so it does not receive a normal Final Contextual score and is capped at 25 as a theoretical, structural-only read. Structurally, the engine is reasonably accessible: 19 archetype-core copies give about 97% chance of at least one in a 5-card opening hand, and 16 searcher-text cards add about 94% chance of a search. The Atlantis/Umi recursion (Warchief, Monster Arms, Levia-Dragon) and the Link and Xyz extenders give the deck some resilience after one interruption, and the 7 hand traps and 14 negation-text cards cover going second at about 71%. The deck has no side deck, no recorded boards and no tournament or matchup data, so the floor, median and matchup scores remain inferred or provisional. Popularity of the Umi archetype and the 62.5% core-card presence were not counted as power, and no card scores were averaged.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 58, Going First ≈ 55, Going Second ≈ 60, Meta = provisional, Tournament Reliability ≈ 50. Modifiers: banlist exposure (-8); no side deck (-4). Final formula: Uncapped: 0.80*Structural(57.7) + 0.20*TournamentReliability(50) + Modifiers(-12) = 44.2; Illegal rule caps it to 25 (theoretical/structural-only, Meta Provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.97 · key two-card combo ≈ — · full-brick estimate ≈ 0.03 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Archetype core is dense (19 copies) so the engine is usually live by turn 1-2
• Searcher-text density (16) and Atlantis GY recursion give resource regeneration
• Layered interaction: 14 negation, 10 removal, 7 hand traps
• Link and Xyz extenders reach 2600-2900 ATK closing power

Weaknesses

• Illegal list: Bahamut Shark is Forbidden and run at 2 copies
• No side deck, so no post-side plan
• Off-archetype singles dilute the engine (exact name purity 3.6%)
• No recorded boards, so the combo floor and median are unverified

Critical choke points

• Umi/Atlantis field presence gates most engine effects; losing the field to a targeted removal or a Fish/Advent answer breaks the line
• Several Link and Xyz summons depend on Atlantis-tagged materials in the GY

Recommended changes

Evidence & confidence

• Verified: Legality: Illegal, Bahamut Shark over the copy limit (Forbidden, 0 legal copies); Main 40 / Extra 15 / Side 0 counts match the OCG size rules; Banlist statuses for restricted cards (Droll and Lock Bird, Maxx C Limited; Ash Blossom, Dominus Impulse, Foolish Burial Goods Semi-Limited); Archetype core usage: 10 of 16 core cards present (62.5%)
• Inferred: Engine accessibility from hypergeometric probabilities (0.97 core, 0.94 searcher); Going-second hand-trap coverage (0.71); Resilience and recovery paths from card text; Closing-power read from ATK values and link/Xyz text
• Provisional: Meta Power (no dated metagame sample); Matchup coverage 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 record absent no win-rate telemetry: going-first/second, matchup and brick rates are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied no side deck registered, so side adaptability cannot be measured