Umi Deck #770044 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 28/100 (±10 · Confidence: Low)

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

Legality

Main 54 / Extra 16 / Side 0 — status: Illegal. 5 violation(s).

Identity & game plan

• Win condition: Umi / Atlantis board that Special Summons Level 7 and higher Atlantean and Daedalus threats and converts them into direct attacks and Xyz or Link boss monsters; Abyss- and Mermail Xyz and Link boss monsters that reach 2800 to 3000 ATK
• Turn 1 (going first): Open with Atlantis, City of the Sea Dragon or Advent of Atlantis plus a searcher such as Warchief of Atlantis or Neptabyss, then Normal Summon into Atlantean and Umi Level 7 access toward Levia-Dragon - Daedalus or Poseidra (Inferred from card text; no recorded boards)
• Turn 2 (going second): Use hand traps (Ash Blossom, Droll & Lock Bird, Evenly Matched, Artifact Lancea) to break the opponent's first combo, then rebuild through the GY-recursion lines (Atlantean Dragoons, Mermail Abysspike) (Inferred)
• Recovery: Searchers in the Main Deck (23 searcher-text cards) and GY-revival effects (Warchief, Monster Arms of Atlantis, Siren Vortex) rebuild the field after a single interruption (Inferred)
• After siding: Not evaluable: the deck has no Side Deck, so there is no post-side plan (Verified gap)

Why it scores here

The deck reliably opens with a searcher (P of at least one searcher in a 5-card hand is about 0.95) and has real Umi engine access, but only 7 of its 16 listed core archetype cards are present and 70 of 85 copies are off-archetype, so the engine is spread across Atlantean, Mermail, Abyss- and Daedalus rather than focused. Interaction is dense (10 hand traps, 10 negation-text cards, 19 removal-text cards), which lifts end-board and going-second scores, while the Extra Deck of 16 Fusion, Synchro, Xyz and Link threats gives strong closing power. Scoring is on the system: the deck earns points from consistency, interaction and boss conversion, not from averaging its individual card strengths, and Umi's popularity (archetype stats show it is a real, played theme) did not earn points on its own. The score is capped to theoretical because the list is illegal (Extra Deck of 16 over the 15 limit, three copy-limit violations including a Forbidden card, and no Side Deck), and no combo boards or tournament data exist to confirm any ceiling or median output.

Dimension scores

How the score was computed

Strategy profile: Midrange 80 / Combo 20 (Midrange profile used; Combo secondary noted as context only). Structural ≈ 54, Going First ≈ 55, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist_exposure (-8); size_and_copy_violations (-6); illegal_cap (-9). Final formula: 0.80*Structural(54) + 0.20*TournamentReliability(40) + ContextModifiers(-14) = 37, then capped to 28 because the list is Illegal (theoretical/structural-only); Meta Power provisional (null)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.95 · 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 searcher access (23 searcher-text cards; about 0.95 chance of at least one in a 5-card hand)
• Layered interaction: 10 hand traps, 10 negation-text cards, 19 removal-text cards
• High-ATK Level 7 and Xyz bosses (Poseidra Abyss 3000 ATK, Abysstrite, Mermail Abyssgaios) for closing power

Weaknesses

• Illegal as built: Extra Deck of 16 exceeds the limit and three cards exceed their copy limits (Called by the Grave is Forbidden)
• Engine spread across Umi, Atlantean, Mermail, Abyss-, Daedalus and Deep Sea, with only 7 of 16 archetype core cards present
• No Side Deck, so there is no post-side plan
• Heavy use of level-0 spells and traps (16) dilutes the Main Deck

Critical choke points

• Atlantis, City of the Sea Dragon is a single copy and the Umi Level 7 access routes depend on it
• Extra Deck overflow means one of the 16 Extra cards must be removed before the list is playable

Recommended changes

Evidence & confidence

• Verified: Extra Deck of 16 exceeds the 15-card OCG maximum; Called by the Grave is Forbidden; Droll & Lock Bird is Limited; Ash Blossom & Joyous Spring is Semi-Limited, all over their legal copy limits; Side Deck is empty (0 cards); Core archetype coverage: 7 of 16 cards present; 70 off-archetype copies; Hypergeometric draw probabilities from the Main Deck
• Inferred: Engine accessibility and consistency estimates (D1, D2); Combo ceiling and median from card text only (D3, D4); Interaction quality from text roles (D7); Going-second hand-trap value (D8); Pilotability (D14)
• Provisional: Meta Power (null, no dated metagame sample); Matchup and format fit (D13); Tournament reliability (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 match record absent No win-rate telemetry; going-first, going-second, matchup and brick rates are Inferred or Unknown Meta Power is provisional unless a dated metagame sample is supplied Deck title is null, so the deck is unnamed in the source export No Side Deck, so post-side evaluation is not possible