Umbral Horror Deck #771746 — Yu-Gi-Oh! OCG
55 Main, 15 Extra, incl. Gorgonic Umbral Horror x3, Mulcharmy Fuwalos x3, Mulcharmy Purulia x3. Created Oct 21, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/21/2026
Main Deck (55)
- Chaos Hunter x2
- Droll & Lock Bird x1
- Garbage Golem x1
- Gorgonic Umbral Horror x3
- Mulcharmy Fuwalos x3
- Mulcharmy Purulia x3
- Shining Umbral Horror x3
- Thousand Umbral Horror x3
- V Umbral Horror x3
- Ash Blossom & Joyous Spring x3
- Ghost Ogre & Snow Rabbit x3
- Barian's Hope x2
- Barian's Seventh Untopia x2
- Forbidden Droplet x3
- Harpie's Feather Duster x1
- Lightning Storm x2
- Rank-Up-Magic Barian's Force x1
- Seventh Ascension x3
- Seventh Tachyon x3
- Barian's Seal x1
- Different Dimension Ground x1
- Evenly Matched x3
- Infinite Impermanence x3
- Solemn Accusation x1
- Solemn Judgment x1
Extra Deck (15)
- CXyz Hope Chaos Barian Dragon x2
- Number 101: Silent Honor ARK x1
- Number 104: Masquerade x1
- Number 104: Masquerade V x3
- Number 106: Giant Hand x1
- Number 61: Volcasaurus x1
- Number 69: Heraldry Crest x1
- Number 69: Heraldry Crest - Dark Matter Demolition x1
- Number 69: Heraldry Crest - Shatter Stream x1
- Number C104: Umbral Horror Masquerade x1
- Number C104: Umbral Horror Masquerade Victory x2
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Deck — Deck Power Evaluation
Final Contextual Deck Power: 30/100 (±12 · Confidence: Low)
| Overall score | Value |
|---|---|
| Structural Deck Power | 60 |
| Going First | 66 |
| Going Second | 64 |
| Meta Power | provisional |
| Tournament Reliability | 55 |
- Primary strategy: Midrange
- Secondary strategies: Toolbox
- Format: ocg
Legality
Main 55 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).
Identity & game plan
- Win condition: Xyz beatdown from Number 104 / Number C104 Masquerade boss monsters, protected by hand traps; Backrow and Xyz-effect removal (Lightning Storm, Harpie's Feather Duster, Number 61) to clear the opponent's board
- Turn 1 (going first): Open on an Umbral Horror or Gorgonic starter (about 0.92 chance of at least one archetype-core card in a 5-card hand), search with V Umbral Horror or Gorgonic, and build toward a Masquerade Xyz
- Turn 2 (going second): Use the 6-card hand's hand traps (about 0.82 chance of at least one) to break the opponent's first summon, then Xyz through the cleared board
- Recovery: Searchers (14 copies by text) and Barian's Seventh Untopia / Seventh Ascension refill the hand; Masquerade V can add a Barian's Spell/Trap from the Deck
- After siding: Not evaluable: the deck has no side deck, so there is no post-side plan
Why it scores here
The score comes from the deck as a system: the archetype core (21 copies, about 0.92 chance of at least one in a 5-card hand) makes the engine reliably live, and 13 hand traps plus 12 negation-text cards give the deck interruption resilience that carries most of the structural score. The Xyz finishers (Number 104 / C104 Masquerade and Heraldry bosses at 2700-3100 ATK) convert board advantage into pressure, and the 14 searchers and recursion backrow keep the hand refilling. The deck is penalised for low archetype purity (14.3%, with 60 off-archetype copies across Mulcharmy, Seventh, Barian's and generic cards), an empty side deck, and no recorded combos, so the combo ceiling and median remain inferred. The score is not based on the Umbral Horror archetype's popularity, and the card scores were not averaged. Because the list breaks the OCG copy limits, the formula result is capped at 30 as a theoretical, structural-only read.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 66 | P(>=1 archetype-core card in hand5) = 0.92; 21 core copies, but only 10 exact-name Umbral Horror copies (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 58 | Hand-trap and searcher density lowers the dead-hand rate, but 18 generic and 60 off-archetype copies raise it (Inferred) |
| D3 | Combo Conversion & Ceiling | 55 | No recorded combo boards; ceiling is read from text (Masquerade Xyz effects, Barian's Seventh Untopia) (Inferred) |
| D4 | Combo Floor & Median Output | 48 | No recorded boards, so the median is unknown and the score sits near the midpoint (Provisional) |
| D5 | Interruption Resilience & Route Redundancy | 72 | 13 hand traps, 12 negation-text cards and two-plus independent starters give strong redundancy (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 62 | 14 searcher-text cards plus Seventh Ascension and Masquerade V recursion refill the hand (Inferred) |
| D7 | End-Board & Interaction Quality | 70 | 23 removal-text cards, Lightning Storm and Harpie's Feather Duster give layered end-board removal (Inferred) |
| D8 | Going-Second & Board-Breaking Power | 66 | hand-trap group reaches 0.82 at least one in a 6-card going-second hand; no going-second win-rate data (Inferred) |
| D9 | Offensive Pressure & Closing Power | 65 | Xyz bosses at 2700-3100 ATK with direct-attack or destruction effects (Verified stat / Inferred) |
| D10 | Main Deck Efficiency & Flexibility | 55 | 55 main cards inside the 40-60 range, but 25 distinct cards across several sub-archetypes (Verified count / Inferred) |
| D11 | Extra Deck Efficiency & Coverage | 60 | 15 Extra Deck cards, all Xyz, 11 distinct, with the Masquerade lines well covered (Verified count) |
| D12 | Side Deck Adaptability | 20 | Side deck is empty, so there is no sideboard flexibility to evaluate (Verified count) |
| D13 | Matchup Coverage & Format Fit | 50 | No tournament link, no dated meta sample, and archetype share is absent (Provisional) |
| D14 | Pilotability & Error Tolerance | 45 | Multi-effect Xyz lines and timing-sensitive hand traps need careful sequencing (Inferred) |
How the score was computed
Strategy profile: Midrange. Structural ≈ 60, Going First ≈ 66, Going Second ≈ 64, Meta = provisional, Tournament Reliability ≈ 55. Modifiers: banlist and copy-limit exposure (-6); engine conflicts across sub-archetypes (-3); no side deck (-3). Final formula: No reliable metagame: 0.80*Structural(60) + 0.20*TournamentReliability(55) = 59; context modifiers -12 gives 47; Illegal cap applied to 30 (theoretical/structural only, per rubric Step 2)
Probability & combo summary
- Opening a starter: P(≥1) ≈ 0.92 · 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
- Archetype core is accessible (about 0.92 in a 5-card hand)
- Dense hand-trap and negation text gives strong interruption resilience
- Xyz finishers reach 2700-3100 ATK with layered effects
Weaknesses
- Illegal copy counts for Seventh Tachyon and Ash Blossom
- Low exact-name archetype purity (14.3%) across several sub-archetypes
- No side deck, so no post-side adaptability
- No recorded combo boards, so the combo floor and ceiling are unverified
Critical choke points
- Single-copy Masquerade boss lines depend on specific Xyz material setups
- Off-archetype copies may leave the Extra Deck unreachable on some hands
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | 2 copies of Seventh Tachyon | Replace with a legal searcher or tech card (1 copy maximum) | Restores legality; the list exceeds the OCG limit of 1 |
| 2 | 1 copy of Ash Blossom & Joyous Spring | Replace with a legal tech card or a second copy of a core engine card | Restores legality; the list exceeds the Semi-Limited limit of 2 |
| 3 | Off-archetype copies | Consolidate into a single sub-archetype (Umbral Horror / Masquerade) | Raises archetype purity and engine coherence |
Evidence & confidence
- Verified: Legality status Illegal: Seventh Tachyon 3/1 and Ash Blossom 3/2 over copy limit; Main 55 and Extra 15 inside OCG size rules; side 0; Archetype usage: Mulcharmy Fuwalos 82.5%, Ash Blossom 80%, Thousand Umbral Horror 75%
- Inferred: Starter access P=0.92 in a 5-card hand (hypergeometric); Hand-trap access P=0.82 in a 6-card hand (hypergeometric); Interruption resilience from hand-trap density and negation text; Engine consistency from core-card probability and searcher density
- Provisional: Meta Power (no dated metagame sample); Matchup and format fit (no 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 win-rate telemetry: going-first/second, matchup and brick rates are Inferred Meta Power is Provisional without a dated metagame sample No side deck, so post-side performance cannot be evaluated
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