Umi Deck #771789 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

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

Legality

Main 47 / Extra 18 / Side 0 — status under the rules at evaluation time: Illegal. 3 violation(s).

Identity & game plan

• Win condition: Umi-based Atlantis/Daedalus board: Warchief of Atlantis and Levia-Dragon - Daedalus recast the Umi field, then Link/Xyz/Synchro boss monsters (Azure Ocean Dragon Lord, Poseidra Abyss, Icejade Gymir Aegirine) attack through a WATER-only board; Swordsoul Supreme Sovereign - Chengying and Mermail Abyssgaios as Synchro/Xyz pressure once the Umi engine has produced a WATER board
• Turn 1 (going first): Open a WATER starter (First Penguin, Neptabyss, Mulcharmy Purulia, Warchief) plus Atlantis or Advent of Atlantis to set up Umi, then search with Fish Sonar or Warchief and fire a Synchro/Xyz/Link boss
• Turn 2 (going second): Hold Ash Blossom, Droll & Lock Bird, Maxx C, and Dominus Impulse to answer the opponent's first interaction, then rebuild Umi through the engine searchers
• Recovery: Searchers (Neptabyss, Warchief, Fish Sonar, Advent of Atlantis) and GY-activated monsters (Atlantean Dragoons, Atlantean Heavy Infantry, Monster Arms of Atlantis) rebuild a starter from the Deck or GY after a disruption
• After siding: Not evaluable: the deck has 0 side cards, so there is no post-side plan in the supplied list

Why it scores here

This Umi list is scored as a system, not as an average of its card scores, and it is illegal in OCG as submitted: Barrier Statue of the Torrent and Bahamut Shark are Forbidden, and the Extra Deck holds 18 cards against a limit of 15, so the final score is capped and the evaluation is structural-only. The engine is reasonably accessible: the archetype core (Atlantis, Warchief, Neptabyss, Mulcharmy, Penguin, First Penguin) gives about a 94% chance of at least one core card in a 5-card opening hand (Inferred), and about 92% of the main deck is searcher text, so starters are findable. The deck reliably opens and converts into a WATER board with a Synchro, Xyz, or Link boss, and it has several answers (Ash Blossom, Droll & Lock Bird, Maxx C, Dominus Impulse, Ice Barrier, Daedalus Maelstrom) to disruption. Weaknesses are a loose build with 63 off-exact-archetype copies across roughly 23 sub-archetypes, a 3-copy Penguin/Mulcharmy block that competes for hand space, no side deck, and no recorded boards or tournament data, so the floor and median cannot be measured. Usage popularity (Atlantis, Warchief, Fish Sonar in the usage stats) confirms the list is real and accessible but did not earn points on its own.

Dimension scores

How the score was computed

Strategy profile: Midrange primary, Toolbox secondary; the Midrange profile is used for the structural score. Structural ≈ 54, Going First ≈ 56, Going Second ≈ 50, Meta = provisional, Tournament Reliability ≈ 50. Modifiers: banlist exposure (-6); extra_deck_overflow (-3); no Side Deck (-1); illegal_cap (-18). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers = 0.80*54 + 0.20*50 - 10 = 43; then ILLEGAL cap applied (theoretical/structural-only) -> 25

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.94 · key two-card combo ≈ — · full-brick estimate ≈ 0.06 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Accessible engine: about 94% chance of at least one archetype-core card in a 5-card opening hand (Inferred)
• Dense searcher text (18 cards) gives good grind and consistent access to starters
• Layered interaction: Ash Blossom, Droll & Lock Bird, Maxx C, Dominus Impulse, Ice Barrier, Daedalus Maelstrom
• High-ATK boss options (3000-ATK Synchro/Xyz/Link) for closing

Weaknesses

• Illegal as submitted: two Forbidden cards and an 18-card Extra Deck
• Loose build: 63 off-exact-archetype copies across about 23 sub-archetypes
• No side deck, so no post-side plan
• Extra Deck contains near-dead cards without their materials (Super Vehicroid Jumbo Drill, Red Dragon Archfiend)
• No recorded boards, so floor, median, and matchup performance are unmeasured

Critical choke points

• Umi/Atlantis field: a single board-wipe or Umi-removal line stalls the whole engine
• Opening-hand dependence on a WATER starter with 3-copy cards giving only about 29% per copy in hand5

Recommended changes

Evidence & confidence

• Verified: Illegal status: Barrier Statue of the Torrent and Bahamut Shark are Forbidden in OCG (legality data); Extra Deck 18 exceeds the OCG maximum of 15 (legality data); Main 47 cards, Extra 18, Side 0 (legality data); Archetype core inclusion and usage statistics (usage statistics)
• Inferred: P(at least one core card in hand5) 0.94 and full-brick proxy 0.064 (hypergeometric estimate); Interaction density and engine accessibility read from card text; Post-side and matchup performance cannot be measured
• Provisional: Meta Power is null: no dated metagame sample was supplied; Matchup coverage and tournament reliability are unmeasured because no tournament link exists
• 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 are absent No win-rate telemetry for going-first/second, matchup, or brick/starter rates Meta Power is Provisional unless a dated metagame sample is supplied Side deck is empty, so post-side adaptability is unmeasured