Umi Control Deck #376271 — Yu-Gi-Oh! Master Duel
40 Main, incl. Planet Pathfinder x3, Megalosmasher X x3, Cosmic Cyclone x3.
Created by: YGO Mod (20517634)
Created On: 11/19/2024
Main Deck (40)
- Planet Pathfinder x3
- Megalosmasher X x3
- Sea Serpent Warrior of Darkness x1
- Cosmic Cyclone x3
- Dark Hole x3
- Demise of the Land x3
- Fish Sonar x1
- Pacifis, the Phantasm City x3
- Pot of Desires x1
- Pot of Duality x1
- Time-Tearing Morganite x2
- Draco-Utopian Aura x3
- Fists of the Unrivaled Tenyi x3
- Paleozoic Dinomischus x2
- Phantasm Spiral Battle x3
- Phantasm Spiral Power x3
- Sea Stealth Attack x2
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47± 6/ 100
Power Score
Structural
51
Reliability
48
Going First
46
Going Second
56
Deck — Deck Power Evaluation
Final Contextual Deck Power: 47/100 (±6 · Confidence: Medium)
| Overall score | Value |
|---|---|
| Structural Deck Power | 51 |
| Going First | 46 |
| Going Second | 56 |
| Meta Power | provisional |
| Tournament Reliability | 48 |
- Primary strategy: Control
- Secondary strategies: Toolbox, Tempo
- Format: master-duel
Legality
Main 40 / Extra 0 / Side 0 — status: Legal.
Identity & game plan
- Win condition: Megalosmasher X and Sea Serpent Warrior of Darkness attacking after the opponent's board has been cleared; the deck has no reliable finisher.; Card-advantage grind from Time-Tearing Morganite, Pot of Desires and Pot of Duality until the opponent runs out of threats.
- Turn 1 (going first): Open Pacifis, the Phantasm City or Planet Pathfinder, use Demise of the Land or Fish Sonar to set up the Umi field, then develop one Normal Monster with a trap backing it.
- Turn 2 (going second): Hold Draco-Utopian Aura, Phantasm Spiral Power, Fists of the Unrivaled Tenyi and Dark Hole for the opponent's summon, then rebuild from draws.
- Recovery: Pot of Desires and Pot of Duality refill the hand; Paleozoic Dinomischus returns from the Graveyard when a Trap is activated.
- After siding: None: the format has no side deck, so there is no post-side plan.
Why it scores here
The deck is scored as a system: its ability to open a functional Umi field, convert that into removal and negation, and grind card advantage, not as an average of its card scores. Its interaction suite is the strongest part, with Dark Hole, Draco-Utopian Aura, Phantasm Spiral Power, Fists of the Unrivaled Tenyi and Cosmic Cyclone giving it dense answers. Only seven monsters are included, and the two real attackers top out at 2000 and 1800 ATK, so the deck has almost no closing power. The Umi field engine is thin (three copies of Pacifis), and Planet Pathfinder, an Effect Monster, conflicts with the Phantasm Spiral cards that require only Normal Monsters on the field. The list also omits every card in the archetype's usage-statistics core, which confirms it is a real build but does not add power, so popularity earned no points.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 40 | P(at least one Pacifis in a 5-card opening hand) ≈ 0.34; the searcher group reaches ≈ 0.69; no archetype core engine present (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 40 | No Monster in 5 opening cards ≈ 0.36 going first, so many hands are spell/trap-only; conflicting Normal Summon and Monster-only conditions add dead-draw risk (Inferred) |
| D3 | Combo Conversion & Ceiling | 30 | No recorded boards exist; the ceiling is read from card text as a Phantasm Spiral board-wipe-and-negate line with weak attackers (Inferred) |
| D4 | Combo Floor & Median Output | 35 | No recorded boards exist, so the median output is inferred from card text and draw density as modest (Inferred) |
| D5 | Interruption Resilience & Route Redundancy | 50 | Two or three independent starters (Field Spell search, Demise, Fish Sonar) and recursion from Paleozoic Dinomischus give partial redundancy (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 62 | Pot of Desires, Pot of Duality and Time-Tearing Morganite provide strong draw and recursion, and Dark Hole trades one-for-many (Verified card text, Inferred value) |
| D7 | End-Board & Interaction Quality | 72 | Five negate or removal effects plus Cosmic Cyclone, Dark Hole and Sea Stealth Attack protection give dense, layered interaction (Verified card text, Inferred quality) |
| D8 | Going-Second & Board-Breaking Power | 62 | Negation and Dark Hole cover the going-second board, and the draw engines help rebuild, but no going-second split is available (Inferred) |
| D9 | Offensive Pressure & Closing Power | 20 | Only Megalosmasher X (2000 ATK) and Sea Serpent Warrior of Darkness (1800 ATK) can attack, with no piercing or direct damage (Verified stat, Inferred) |
| D10 | Main Deck Efficiency & Flexibility | 55 | Compact 17-card main with four copies max, but the monster count is low for a 40-card deck (Verified composition, Inferred) |
| D11 | Extra Deck Efficiency & Coverage | 50 | No Extra Deck is run, so this dimension is neutral and not a strength or weakness (Verified) |
| D12 | Side Deck Adaptability | 45 | Master Duel has no side deck, so there is no post-side plan to score (Verified; Provisional) |
| D13 | Matchup Coverage & Format Fit | 50 | No dated metagame sample or tournament link is available, so format fit is neutral (Provisional) |
| D14 | Pilotability & Error Tolerance | 45 | Many conditional trap activations and a Field Spell dependency demand careful sequencing (Inferred) |
How the score was computed
Strategy profile: Control. Structural ≈ 51, Going First ≈ 46, Going Second ≈ 56, Meta = provisional, Tournament Reliability ≈ 48. Modifiers: engine conflict (-3). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional; D13 dropped from Structural and weights renormalised)
Probability & combo summary
- Opening a starter: P(≥1) ≈ 0.34 · 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: Dark Hole, Draco-Utopian Aura, Phantasm Spiral Power, Fists of the Unrivaled Tenyi and Cosmic Cyclone
- Strong draw and recursion from Pot of Desires, Pot of Duality, Time-Tearing Morganite and Paleozoic Dinomischus
- Multiple searches for the Umi field spell (Planet Pathfinder, Demise of the Land, Fish Sonar)
Weaknesses
- Only seven monsters, and the attackers top out at 2000 and 1800 ATK
- Planet Pathfinder breaks the Normal-only condition of the Phantasm Spiral traps
- No archetype-core Mermail or Abyss cards, which are 100% inclusion in the archetype's usage statistics
Critical choke points
- Pacifis, the Phantasm City (3 copies): the only Field Spell that sets up Umi, with ≈0.34 chance of appearing in a 5-card opening hand
- Normal-only board requirement for Phantasm Spiral Battle and Power, which Planet Pathfinder breaks
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | Planet Pathfinder (1 copy) | A Normal Monster or an archetype-core monster from the usage statistics | Pathfinder's Effect Monster status conflicts with the Normal-only Phantasm Spiral traps, and the deck needs more monsters to function. |
| 2 | One Time-Tearing Morganite | A monster that can attack or close the game | The deck has almost no closing power (D9), and one draw-2 card can be swapped for a finisher. |
Evidence & confidence
- Verified: Legality: 40 main cards, no side or Extra, Pot of Duality at Limited 1 copy; Card text for all 17 distinct cards; Archetype-core usage statistics: all 25 listed core cards absent from this list
- Inferred: Hypergeometric opening-hand probabilities; Monster-free opening-hand estimate; Interaction density and card-advantage quality from text; Going-first and going-second power estimates
- Provisional: Meta Power (no dated metagame sample); Format fit and matchup coverage (no tournament data)
- Data gaps: no combos supplied — combo floor/median/ceiling is text-only inference no tournament link — archetype meta-share and per-pilot match record absent no win-rate telemetry exists in YGOVN (going-first/second, matchup, game-level, brick/starter/OTK rates) — those signals are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied
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