Umbral Horror Deck #768788 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±8 · Confidence: Low)

• Primary strategy: Midrange
• Secondary strategies: Stun
• Format: ocg

Legality

Main 55 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Xyz pressure from the Umbral Horror / Masquerade / Ryzeal Extra Deck Xyz monsters (Number 104: Masquerade V, Number C104, Ryzeal Detonator, Ryzeal Duo Drive) backed by Thousand Umbral Horror and V Umbral Horror searches; Hand-trap and negation control (Ash Blossom, Ghost Belle, Ghost Ogre, Effect Veiler, Infinite Impermanence, Droll & Lock Bird) that protects the Xyz line through the opponent's turn
• Turn 1 (going first): Open with a searcher and a starter from the 18-card archetype core (P of at least one core card in a 5-card hand is about 0.87, Inferred), then Xyz Summon from the Extra Deck while holding a hand trap for the opponent's response
• Turn 2 (going second): Hold Ash Blossom, Ghost Belle, Effect Veiler, Droll and Maxx C as interaction in a 6-card hand (P of at least one hand trap is about 0.87, Inferred) and break the opponent's first board before committing the Xyz line
• Recovery: Recover via Barian's Seventh Untopia, Barian's Hope, Mulcharmy draw effects and the GY-to-Extra Xyz routes; no side deck exists to rebuild the list after a loss
• After siding: Not evaluable: the deck runs zero Side Deck cards, so no post-side plan exists (score 10 on D12)

Why it scores here

The deck is scored as a system: its Umbral Horror core (18 copies) and two searchers give roughly an 87% chance of at least one core card in a 5-card opening hand (Inferred hypergeometric estimate), so it usually reaches a live starter by turn 1 or 2. Its Extra Deck Xyz finishers (Masquerade V, Number C104, Ryzeal Detonator at 3000 ATK) and a dense hand-trap and negation package (about 15 hand traps, 20 negation-text cards) give it real endboard and going-second interaction. The score is held down by the illegal list: Number 60 is Forbidden in OCG, which caps the deck to a theoretical structural read. There is no recorded combo data, no tournament link, and no side deck, so the combo floor, matchup fit and post-side plan are unmeasured. Archetype popularity (67% to 73% inclusion for the core Xyz) was not credited as power, and card scores were not averaged.

Dimension scores

How the score was computed

Strategy profile: Midrange primary with Stun secondary (disclosed, not blended numerically). Structural ≈ 60, Going First ≈ 62, Going Second ≈ 66, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist exposure (-12); no side deck (0). Final formula: Illegal deck: theoretical structural-only. Uncapped 0.80*Structural(60) + 0.20*TournamentReliability(45) + modifiers(-12) = 45, capped to 30 because the list contains a Forbidden card.

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.87 · key two-card combo ≈ — · full-brick estimate ≈ 0.13 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Core Umbral Horror / Barian's searchers reach a starter about 87% of the time in a 5-card opening (Inferred)
• Strong Extra Deck closing threats: 3000 ATK Ryzeal Detonator, 3000 ATK Number C104, 2700 ATK Masquerade V (Verified stats)
• Dense going-second interaction: about 15 hand traps and 20 negation-text cards (Inferred from text and flags)

Weaknesses

• Illegal list: Number 60 is Forbidden in OCG and cannot be run (Verified)
• No side deck, so no post-side plan and no adaptation after a loss (Verified)
• Low archetype purity (10% exact name) with many off-archetype tech and hand traps, which weakens engine coherence (Verified count, Inferred effect)
• High interaction count with many Limited cards makes the deck fragile to a single banlist or a single trap-based answer (Inferred)

Critical choke points

• The Forbidden Number 60 in the Extra Deck must be removed before the deck can be played; the list is otherwise theoretical
• Searcher and Xyz access depends on about 16 searcher-text cards; losing this density collapses the starter rate (Inferred)

Recommended changes

Evidence & confidence

• Verified: Legality: Number 60 is Forbidden in OCG and run once (legal copies 0); Main 55, Extra 15, Side 0 against OCG size rules; Card stats and text for the Xyz and hand-trap cards; Core count of 18 copies and 16 searcher-text cards
• Observed: Usage statistics: Umbral Horror core cards at 50% to 81% inclusion across archetype decks
• Inferred: Hypergeometric starter access (about 0.87 at least one core card in 5 cards); Brick rate proxy (about 0.125); Going-second hand-trap coverage (about 0.87 in 6 cards); Interaction quality from text and role flags; Structural dimension scores and weights
• Provisional: Meta Power (null, 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 match record absent No win-rate telemetry exists in YGOVN for going-first, going-second, matchup or brick rates Meta Power is Provisional unless a dated metagame sample is supplied Deck title is null in the export Side deck is empty, so post-side scoring is not measurable