Umi Deck #769363 — Yu-Gi-Oh! OCG
40 Main, 15 Extra, incl. Mulcharmy Purulia x3, Siren Vortex of Atlantis x3, Warchief of Atlantis x3. Created Oct 20, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/20/2026
Main Deck (40)
- Coralianectes, the Luminous Cradle Dragon x1
- Droll & Lock Bird x1
- Levia-Dragon of Atlantis - Daedalus x2
- Maxx "C" x1
- Monster Arms of Atlantis x2
- Mulcharmy Purulia x3
- Siren Vortex of Atlantis x3
- Warchief of Atlantis x3
- Megalosmasher X x1
- Ash Blossom & Joyous Spring x2
- Advent of Atlantis x3
- Atlantis, City of the Sea Dragon x1
- Call of Atlantis x3
- Fish Sonar x3
- Instant Fusion x1
- Pot of Prosperity x1
- Super Polymerization x2
- Daedalus Maelstrom x1
- Dominus Impulse x2
- Infinite Impermanence x3
- Virtue Stream x1
Extra Deck (15)
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37± 8/ 100
Power Score
Structural
50
Reliability
45
Going First
55
Going Second
45
Deck — Deck Power Evaluation
Final Contextual Deck Power: 37/100 (±8 · Confidence: Low)
| Overall score | Value |
|---|---|
| Structural Deck Power | 50.5 |
| Going First | 55 |
| Going Second | 45 |
| Meta Power | provisional |
| Tournament Reliability | 45 |
- Primary strategy: Combo
- Secondary strategies: Toolbox, Tempo
- Format: ocg
Legality
Main 40 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 1 violation(s).
Identity & game plan
- Win condition: Link and Xyz pressure from Umi-named Atlantis and Daedalus monsters (Levia-Dragon, Warchief, Azure Ocean Dragon Lord - Neo-Daedalus Rage) on a WATER-heavy field; Fusion and Xyz follow-up (Mudragon of the Swamp, LeVirtue Dragon, Elder Entity Norden) after the Atlantis lines are spent
- Turn 1 (going first): Fish Sonar or Advent of Atlantis to search, Atlantis field spell for level reduction and Umi naming, then a Link into Daedalus. Hand traps (Ash Blossom, Droll & Lock Bird, Maxx C) cover the turn
- Turn 2 (going second): Ash Blossom, Droll, Maxx C and Infinite Impermanence to stop the opponent's first play, then rebuild through Warchief and Mulcharmy Purulia draws
- Recovery: Warchief and Monster Arms of Atlantis recycle from the GY, and Advent of Atlantis and Call of Atlantis re-search the Atlantis core
- After siding: No side deck is registered (Side Deck size 0), so there is no post-side plan in the evidence
Why it scores here
This OCG Umi list reliably opens its core: the archetype core group is in the opening hand about 97% of the time (hypergeometric, Inferred), and the searcher text group has a roughly 92% chance of at least one searcher in hand. Its engine is built from Atlantis and Daedalus Link and Xyz summons, with seven hand-trap or negation cards giving it a credible first-turn defence. The score is pulled down by legality: Bahamut Shark is Forbidden and the deck runs one copy, so this is a theoretical, structural-only read and not a playable-list score. There are no recorded boards, no tournament link, and no side deck, so the combo floor, median and ceiling are text-only inference and post-side adaptability is effectively zero. Popularity was not credited, and the score was not built from averaging individual card scores; it reflects the system's consistency and interaction, capped by the banlist violation.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 62 | P(at least 1 Atlantis-named starter in opening 5) is high (archetype core 0.97, searcher text 0.92) and Fish Sonar and Advent of Atlantis give two search routes (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 55 | Core density is high, but 9 single-copy cards and a 0-level-heavy spread with 21 level-0 non-monsters create some dead draws (Inferred) |
| D3 | Combo Conversion & Ceiling | 45 | Ceiling inferred from text only: Levia-Dragon, Warchief and Neo-Daedalus Rage chain Link and Special Summon lines, but no recorded boards exist (Inferred) |
| D4 | Combo Floor & Median Output | 40 | Median output is unknown without recorded boards; the Atlantis core is single-line dependent and no board data was supplied (Provisional) |
| D5 | Interruption Resilience & Route Redundancy | 50 | Two independent routes (Atlantis and Daedalus) and multiple hand traps give some recovery, but there is no board data to confirm (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 45 | Recursion from the GY (Warchief, Monster Arms, Advent of Atlantis, Call of Atlantis) supports grind, but there is no resource telemetry (Inferred) |
| D7 | End-Board & Interaction Quality | 55 | Seven hand traps and negation text (Ash Blossom, Droll, Maxx C, Infinite Impermanence, Dominus Impulse, Daedalus Maelstrom) give layered interaction (Verified flags, Inferred quality) |
| D8 | Going-Second & Board-Breaking Power | 40 | Going-second plan relies on hand traps and Warchief-style recovery, with a limited board-breaker count and no going-second split data (Inferred) |
| D9 | Offensive Pressure & Closing Power | 50 | Closing power depends on Link 4 Neo-Daedalus Rage at 2900 ATK and Levia-Dragon at 2600 ATK, but the finishing line is unmeasured (Inferred) |
| D10 | Main Deck Efficiency & Flexibility | 65 | 40 main cards with 21 distinct entries is compact for the engine, and the copy histogram has no obvious dead slots (Verified composition) |
| D11 | Extra Deck Efficiency & Coverage | 60 | Extra Deck is fully used (9 Link, 3 Xyz, 3 Fusion), with Link Summon coverage across the Daedalus and Marincess lines (Verified composition) |
| D12 | Side Deck Adaptability | 20 | No side deck is registered (Side Deck size 0), so there is no adaptability to score beyond the zero-side baseline (Verified) |
| D13 | Matchup Coverage & Format Fit | 35 | No dated meta sample or tournament link exists; archetype share is absent, so format fit is provisional (Provisional) |
| D14 | Pilotability & Error Tolerance | 50 | Multi-step Link and Xyz sequencing with hand-trap timing is demanding for pilots, with several decision points per turn (Inferred) |
How the score was computed
Strategy profile: Combo. Structural ≈ 50.5, Going First ≈ 55, Going Second ≈ 45, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist exposure (-12). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers(-12) (Meta provisional); Illegal deck, so 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 archetype core density, about 97% core access in opening 5 (Inferred)
- Seven hand traps and layered negation text for going-second interaction (Verified flags)
- Compact main deck with full Extra Deck use across Link, Xyz and Fusion (Verified composition)
Weaknesses
- Illegal: Bahamut Shark is Forbidden and run 1 time (Verified)
- No side deck registered, so there is no post-side plan (Verified)
- Low exact-name purity (5.5%): the engine is spread across related sub-archetypes (Verified)
Critical choke points
- Bahamut Shark is a Forbidden card in the Extra Deck; removing it is required before the list is playable
- Atlantis, City of the Sea Dragon is the single field-spell engine enabler for Umi naming and level reduction
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | Bahamut Shark | A legal Rank 3 or lower WATER Xyz or a second Link 4 Daedalus monster | Removes the Forbidden copy and makes the list legal for OCG |
Evidence & confidence
- Verified: Deck is Illegal: Bahamut Shark Forbidden, 1 copy run, 0 legal copies; Main 40, Extra 15, Side 0; size is within OCG limits; Extra Deck is 9 Link, 3 Xyz, 3 Fusion; Role tags: 7 hand traps, 13 negation texts, 10 removal texts
- Inferred: Archetype core access about 0.97 in opening 5; Interaction density is layered but its quality is a text read; Ceiling is a text-only Link and Xyz chain read
- Provisional: Meta and matchup fit, because there is no dated metagame sample or 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 are absent No side deck registered; post-side adaptability cannot be measured No win-rate telemetry exists for this deck Meta Power is Provisional without a dated metagame sample
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