Umi Deck #770259 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

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

Legality

Main 40 / Extra 15 / Side 0 — status: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Atlantis/Umi board built from Field Zone and GY recursion, converted into Daedalus/Atlantean Link and Xyz boards (Azure Ocean Dragon Lord, Abysstrite, Levia-Dragoon); Atlantean Dragoons and Poseidra direct or near-direct pressure once a Umi field is established
• Turn 1 (going first): Opening starter (First Penguin, Fish Sonar, Mulcharmy Purulia or Warchief) to place Atlantis/Umi, then Advent or Atlantis recursion into a Level 7 or Link board
• Turn 2 (going second): Hand traps (Ash Blossom, Droll & Lock Bird, Maxx C, Infinite Impermanence, Dominus Impulse) to slow the opponent, then the same Umi engine through the board
• Recovery: Warchief and Neptabyss search and GY recursion of Atlantis monsters to rebuild after a single interruption
• After siding: Not evaluable: the list has no Side Deck, so there is no post-side plan

Why it scores here

The deck reliably opens an Umi/Atlantis starter: the archetype core group has about a 97% chance of at least one card in a 5-card opening hand, and 17 searchers give it a high chance of reaching the engine. Its structure is an Atlantis/Umi engine that turns field and GY resources into Level 7 and Link boards, backed by six hand traps and about ten negation effects, so the system can hold up through one interruption. The score is not earned from the Umi name or the archetype's popularity, and the card scores were not averaged. The lack of recorded boards keeps the ceiling and median claims at Inferred, and the list has no Side Deck, so post-side adaptability is minimal. Because the list runs two Forbidden Bahamut Shark, the deck is Illegal; its score is therefore a structural cap only and not a usable Final Contextual score.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 56, Going First ≈ 55, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist_exposure (-12); illegal_cap (0). Final formula: No reliable metagame: 0.80*Structural(56) + 0.20*TournamentReliability(45) = 54, plus modifiers (-12) = 42, then Illegal cap applied (score capped at 25; theoretical/structural-only)

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

• High chance of opening a core starter (about 97%)
• 17 searchers provide reach toward the engine
• Six hand traps and about ten negation effects provide interaction on both turns
• All 15 Extra Deck slots used with a coherent Xyz/Link/Synchro mix

Weaknesses

• Two Forbidden Bahamut Shark make the list illegal as built
• No Side Deck (0 cards), so no post-side plan
• Low exact-name archetype purity (7.3%) with 51 off-archetype copies
• No recorded boards, so the combo ceiling and median cannot be verified

Critical choke points

• Atlantis/Umi field presence: most lines depend on Atlantis, City of the Sea Dragon or an Umi on the field
• Forbidden Bahamut Shark occupies Extra Deck slots that a legal list would need to fill

Recommended changes

Evidence & confidence

• Verified: Illegal status: 2x Bahamut Shark vs 0 legal copies (Forbidden); Main 40 and Extra 15 within OCG size rules; Side 0 is legal; Ash Blossom and Dominus Impulse at 2 copies are legal (Semi-Limited)
• Observed: Usage stats: 16 core archetype cards listed; 9 present in this deck
• Inferred: Starter access about 97% (hypergeometric on archetype core group); Brick, interaction and closing scores from card text; Going-first and going-second estimates from composition
• 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 record absent no win-rate telemetry: going-first/second, matchup and brick rates are Inferred or Unknown Meta Power provisional without a dated metagame sample Deck has no Side Deck, so post-side performance cannot be scored