Umi Deck #767863 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

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

Legality

Main 57 / Extra 15 / Side 0 — status: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Umi / Atlantis engine: Advent of Atlantis or Fish Sonar search Atlantis, City of the Sea Dragon or Umi-named monsters, then Link and Synchro Summons (Levia-Dragon, Azure Ocean Dragon Lord, Levia-Dragoon, Poseidra, White Aura Whale) into large boards; Mulcharmy draw engine (Fuwalos and Purulia) plus Pot of Sloth card advantage over a long game
• Turn 1 (going first): Turn 1: Advent of Atlantis or Fish Sonar to add Atlantis or Umi, set Atlantis field spell, then Warchief or Siren Vortex to extend into Link or Synchro Summons
• Turn 2 (going second): Hold hand traps (Ash Blossom, Droll and Lock Bird, Maxx C, Solemn Judgment, Solemn Warning, Dominus Impulse, Infinite Impermanence) to answer the opponent's first board, then rebuild through Daedalus Maelstrom and Warchief in the Graveyard
• Recovery: Pot of Sloth and Mulcharmy draws refill the hand; Warchief and Levia-Dragon recover Umi-named monsters from the Graveyard
• After siding: No side deck is registered (side count 0), so there is no post-side plan in this list

Why it scores here

The deck is scored as one system, not as an average of its cards. Its engine reliably reaches Advent of Atlantis or Fish Sonar in the opening hand about 24% of the time for a 3-copy card, and about 84% of the time it has at least one searcher, so it usually gets a starter going (Inferred from hypergeometric estimates). Interaction is dense, with 6 Solemn cards, Ash Blossom, Dominus Impulse, Droll, Maxx C and Infinite Impermanence, which gives it good resilience and going-second hand-trap coverage (Inferred). The combo ceiling and median are unknown because no recorded boards exist, so those two scores are text-only inferences and are low-confidence. Popularity did not earn points: the Umi core is 62.5% present and the exact-name purity is only 5.6%, with 68 off-archetype copies spread across Atlantis, Daedalus, Mulcharmy, Solemn, Greed and others. Two Forbidden cards (Bahamut Shark and Triple Tactics Talent) make the list illegal, so the score is capped at 25 and the evaluation is theoretical or structural only.

Dimension scores

How the score was computed

Strategy profile: Midrange profile used for structural score; Control secondary is noted but not blended. Structural ≈ 52, Going First ≈ 50, Going Second ≈ 56, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Banlist exposure (-8); Off-archetype spread and engine conflict (-4). Final formula: Illegal cap applied. Uncapped: 0.80*Structural(52) + 0.20*TournamentReliability(45) + modifiers(-12) = 39, then capped to 25 because the deck is illegal. Structural and final values are theoretical-only. Meta provisional (null).

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.24 · 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 interaction: six Solemns, Ash Blossom, Dominus Impulse, Droll, Maxx C, Infinite Impermanence
• Searcher density (17 searcher-text cards) gives a high chance of finding an engine piece
• Strong Extra Deck boss options at 2600-3000 ATK

Weaknesses

• Two Forbidden cards make the deck illegal in OCG
• Low exact-name archetype purity (5.6%) and 68 off-archetype copies
• No side deck, so no post-side plan
• Single Atlantis field spell is the key starter piece and is reached only through searchers

Critical choke points

• Atlantis, City of the Sea Dragon (1 copy) must be reached through Advent of Atlantis or Fish Sonar
• Advent of Atlantis (3 copies) is the main bridge into the engine

Recommended changes

Evidence & confidence

• Verified: Legality: 2 Forbidden cards in the list (Bahamut Shark, Triple Tactics Talent); Main 57 and Extra 15 are within the OCG size rules; Copy limits are respected for the Limited and Semi-Limited cards; Side deck is 0 cards
• Observed: Archetype core inclusion and usage statistics (62.5% of core cards present)
• Inferred: Hypergeometric starter and interaction estimates; Dimension scores D1 to D14 from card text and composition; Structural and going-first and going-second values
• Provisional: Meta power (null) and matchup fit D13 (no dated metagame sample)
• Data gaps: no combos supplied, so combo floor, median and ceiling are text-only inference no tournament link, so archetype meta-share and per-pilot match record are absent no win-rate telemetry in YGOVN; going-first and going-second splits are Inferred Meta Power is Provisional unless a dated metagame sample is supplied no side deck (side count 0)