Umi Deck #767857 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 40/100 (±10 · Confidence: Low)

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

Legality

Main 59 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Umi / Atlantis engine ends in Extra Deck boss monsters (Poseidra Abyss, Abysstrite, Levia-Dragon - Daedalus, Azure Ocean Dragon Lord) backed by WATER monster recursion.; Direct attacks from Atlantean Dragoons and Level 3-or-lower Sea Serpents, plus Mermail King - Neptabyss pointing at WATER monsters.
• Turn 1 (going first): Open Mulcharmy or Neptabyss / Mermail searchers, search an Atlantis-named card, and go Extra Deck through Link or Xyz boards while holding Ash Blossom and Solemn for disruption.
• Turn 2 (going second): Hand traps (Ash Blossom, Droll & Lock Bird, Evenly Matched) and Solemn-family negates to break the opponent's board, then rebuild the Umi board from the GY.
• Recovery: Mulcharmy draw and Eria or Mermail searches refill the hand; WATER monsters recur from the GY through Abyss-sting Triaina, LeVirtue Dragon and Warchief of Atlantis.
• After siding: No Side Deck is registered, so no post-side plan can be evaluated (Unable to verify).

Why it scores here

The deck reliably opens an Atlantis or Mermail starter about 70 percent of the time, based on the core-group hypergeometric estimate and the searcher density (0.85 P of at least one searcher in the opening 5 cards). Its interaction layer is the strongest part of the system: six hand traps, several Solemn-family negates and Droll & Lock Bird give it layered answers to the opponent's board. Its closing power comes from several 2800 to 3000 ATK Extra Deck bosses (Poseidra Abyss, Icejade Gymir, Swordsoul Supreme Sovereign, Dragite), but no combo evidence was supplied, so the ceiling and median are text-only inference. The score is held down by the illegal list (two cards over their Semi-Limited copy limit), the absent Side Deck and the absence of any matchup or tournament data; popularity and archetype meta-share earned no points. This evaluation scores the deck as a connected system and does not average individual card scores.

Dimension scores

How the score was computed

Strategy profile: Combo. Structural ≈ 58, Going First ≈ 60, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: illegal_copy_limit (-6); no Side Deck (-4); banlist exposure (-4). Final formula: Illegal list: no normal Final score. Computed 0.80*Structural(58.1) + 0.20*TournamentReliability(40) = 54.5, capped to 40 for the illegal list. Meta provisional, not used.

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.7 · 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

• Layered interaction: six hand traps, three Solemn cards, Droll & Lock Bird and Daedalus Maelstrom
• Strong Extra Deck closers at 2800 to 3000 ATK
• Searcher density (18 cards) keeps the hand functional

Weaknesses

• Illegal list: Ash Blossom and Dominus Impulse exceed their Semi-Limited copy limit
• No Side Deck registered
• Heavy off-archetype spread (74 copies outside the exact Umi name) hurts engine coherence
• Limited cards are run at their caps, so there is little redundancy

Critical choke points

• Mulcharmy and Neptabyss searchers are the only early bootstrap
• Atlantis, City of the Sea Dragon as the field-based engine enabler

Recommended changes

Evidence & confidence

• Verified: Illegal status: Ash Blossom and Dominus Impulse exceed legal copies 2 (BanList Semi-Limited); Main 59, Extra 15, Side 0 counts from legality and composition; Extra Deck archetype breakdown (5 Xyz, 4 Synchro, 1 Fusion, 5 Link); Usage stats: about 50 percent core present, core list drawn from usage statistics
• Inferred: Starter and searcher probabilities from the hypergeometric estimates; Interaction quality from card text; Combo ceiling and pilotability from text, with no recorded boards
• Provisional: Meta power (no dated metagame sample); Matchup and tournament reliability (no tournament link)
• Data gaps: No combos supplied, so the 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, brick and starter rates) No Side Deck registered, so no post-side evaluation is possible Meta power is provisional without a dated metagame sample