Umi Deck #774758 — Yu-Gi-Oh! OCG
57 Main, 15 Extra, incl. Abyssrhine, the Atlantean Spirit x3, Atlantean Dragoons x3, First Penguin x3. Created Oct 28, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/28/2026
Main Deck (57)
- Abyssrhine, the Atlantean Spirit x3
- Atlantean Dragoons x3
- Atlantean Heavy Infantry x1
- Droll & Lock Bird x1
- First Penguin x3
- Gameciel, the Sea Turtle Kaiju x3
- Levia-Dragon of Atlantis - Daedalus x1
- Mermail Abyssteus x3
- Mermail Shadow Squad x3
- Monster Arms of Atlantis x1
- Moulinglacia the Elemental Lord x1
- Mulcharmy Fuwalos x3
- Mulcharmy Purulia x3
- Neptabyss, the Atlantean Prince x3
- Nibiru, the Primal Being x3
- Poseidra, the Storming Atlantean x3
- Siren Vortex of Atlantis x1
- Warchief of Atlantis x1
- Ash Blossom & Joyous Spring x3
- Deep Sea Diva x1
- Deep Sea Minstrel x3
- Ghost Ogre & Snow Rabbit x2
- Abyss-scale of the Mizuchi x1
- Advent of Atlantis x1
- Atlantis, City of the Sea Dragon x1
- Call of Atlantis x1
- Daedalus Maelstrom x1
- Dominus Impulse x3
Extra Deck (15)
- Azure Ocean Dragon Lord - Neo-Daedalus Rage x1
- Levia-Dragoon - Daedalus x1
- Marincess Coral Anemone x1
- Mermail King - Neptabyss x1
- Adamancipator Risen - Dragite x1
- Graydle Dragon x1
- Icejade Gymir Aegirine x1
- Ravenous Crocodragon Archethys x1
- Deep Sea Prima Donna x1
- Deep Sea Repetiteur x1
- Abysstrite, the Atlantean Spirit x1
- LeVirtue Dragon x1
- Mermail Abyssgaios x1
- Poseidra Abyss, the Atlantean Dragon Lord x1
- Toadally Awesome x1
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Deck — Deck Power Evaluation
Final Contextual Deck Power: 30/100 (±8 · Confidence: Low)
| Overall score | Value |
|---|---|
| Structural Deck Power | 55 |
| Going First | 58 |
| Going Second | 55 |
| Meta Power | provisional |
| Tournament Reliability | 45 |
- Primary strategy: Midrange
- Secondary strategies: Toolbox, Combo
- Format: ocg
Legality
Main 57 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).
Identity & game plan
- Win condition: Atlantis/Umi board built from Atlantean and Mermail monsters, closing through Poseidra Abyss, Abysstrite, Moulinglacia and Gameciel (Inferred from card text and archetype core); Direct attacks from Atlantean Dragoons and Link/Synchro boards (Inferred)
- Turn 1 (going first): Open with Atlantis, City of the Sea Dragon or Advent of Atlantis plus Atlantean/Mermail starters to reach a Level-7 Umi board (Inferred)
- Turn 2 (going second): Use hand traps (Ash Blossom, Ghost Ogre, Nibiru, Droll & Lock Bird) to stop the opponent's summon, then Mermail/Atlantean engine (Inferred)
- Recovery: Recover through Mermail Abyssteus, Neptabyss and Warchief search and the Extra Deck Link/Xyz rebuilds (Inferred)
- After siding: Not evaluable: side_count is 0, so no post-side plan exists
Why it scores here
The deck is Illegal as submitted: Ash Blossom & Joyous Spring and Dominus Impulse are each run three times against a Semi-Limited limit of two, so the score is capped and the evaluation is theoretical and structural only. Structurally the list reliably reaches its archetype core (18 copies, about 86% chance of at least one in a 5-card opening hand, Inferred) and has strong interaction density from nine hand traps and thirteen negation-text cards, which lifts end-board and going-second scores. Consistency is held back by a heavy off-archetype mix (0% exact-name purity, Atlantean and Mermail sub-archetypes spread across roughly seventeen names), by Atlantis-specific cards that need the field spell on board, and by having no side deck. No combo recordings exist, so the ceiling and median are text-only inferences. Popularity did not earn points, and card scores were not averaged into the deck score.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 66 | P(at least one archetype core card in a 5-card opening hand) ≈ 0.86; 18 core copies (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 55 | Atlantis-field and Umi-dependent cards plus nine hand traps create dead-card risk; estimated from text and copy histogram (Inferred) |
| D3 | Combo Conversion & Ceiling | 50 | No parseable combo boards; ceiling is a semantic read of Abysstrite, Poseidra Abyss and Gameciel text (Inferred) |
| D4 | Combo Floor & Median Output | 45 | No recorded boards; median is text-only inference, lower than the ceiling (Inferred) |
| D5 | Interruption Resilience & Route Redundancy | 60 | Multiple independent starters (Atlantean, Mermail, Penguin, Mulcharmy) and recursion from GY effects (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 55 | Search and float text (searcher_text 19, Warchief and Neptabyss recursion) against a limited resource base (Inferred) |
| D7 | End-Board & Interaction Quality | 68 | Hand traps 9, negation text 13 and removal text 18 give broad interaction (Inferred from role tags and text) |
| D8 | Going-Second & Board-Breaking Power | 62 | Going-second hand-trap probability ≈ 0.66 for at least one of 9 hand traps (Inferred) |
| D9 | Offensive Pressure & Closing Power | 62 | Poseidra Abyss 3000 ATK, Abysstrite 2100 ATK with 300 ATK per material, Gameciel 2200 ATK (Verified stats, Inferred closing) |
| D10 | Main Deck Efficiency & Flexibility | 55 | 57 main cards, 28 distinct, with 14 three-of slots and 72 off-archetype copies (Verified composition, Inferred efficiency) |
| D11 | Extra Deck Efficiency & Coverage | 60 | Extra Deck of 15 mixes Link, Synchro and Xyz with strong overlap in Umi-related summons (Verified breakdown, Inferred coverage) |
| D12 | Side Deck Adaptability | 15 | side_count is 0, so no post-side adaptation exists (Verified) |
| D13 | Matchup Coverage & Format Fit | 45 | No tournament link or dated metagame; Provisional |
| D14 | Pilotability & Error Tolerance | 45 | Multi-step Atlantis and Umi lines with many decision points (Inferred) |
How the score was computed
Strategy profile: Balanced (default; strategy is a Midrange/Combo hybrid). Structural ≈ 55, Going First ≈ 58, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist_exposure (-12). Final formula: Illegal deck: capped at 30 (theoretical/structural-only). Pre-cap blend 0.80*Structural(55) + 0.20*TournamentReliability(45) = 53, then context modifiers (-12) and the illegal-deck cap give 30. Meta Power provisional.
Probability & combo summary
- Opening a starter: P(≥1) ≈ 0.86 · 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
- Core engine reliably accessible (86% for at least one core card in hand5, Inferred)
- Dense interaction: 9 hand traps, 13 negation-text cards, 18 removal-text cards
- Strong Level-7 and Level-8 finishers in the Extra Deck (Poseidra Abyss, Abysstrite, Gameciel, Graydle)
Weaknesses
- Illegal copy limits on Ash Blossom and Dominus Impulse
- Heavy off-archetype mix with zero exact-name purity
- No side deck, so no post-side adaptation
- Atlantis-specific cards are dead without the field spell
Critical choke points
- Atlantis, City of the Sea Dragon (1 copy) gates most Umi-specific effects
- Levia-Dragon of Atlantis (1 copy) is a single Umi-enabler
- Hand-trap dependence on Ash Blossom (illegal at 3 copies)
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | One copy each of Ash Blossom & Joyous Spring and Dominus Impulse | Any legal non-copy card (or leave the slot empty) | Restores legality; the deck cannot receive a normal score while Illegal |
| 2 | Off-archetype or low-impact one-ofs | A second Atlantean or Mermail engine card | Raises exact-archetype coherence and brick resistance (Inferred) |
| 3 | None | Side deck (up to 15 cards) | Enables a post-side plan for best-of-3 play |
Evidence & confidence
- Verified: Main 57 / Extra 15 / Side 0 within OCG size rules; Ash Blossom and Dominus Impulse over OCG copy limit (3 vs 2); Droll & Lock Bird is Limited and runs 1 copy (legal); Core card counts and per-card stats from the card table
- Observed: Archetype core inclusion across usage stats (58.8% of core cards present)
- Inferred: Opening-hand consistency estimates from hypergeometric probabilities; Strategy classification and functional roles from card text; Going-first and going-second estimates
- Provisional: Meta Power (no dated metagame sample); Matchup and format-fit scores (D13)
- Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record absent No win-rate telemetry for OCG Umi No side deck, so post-side scoring cannot be measured Meta Power is provisional without a dated metagame sample
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