Umbral Horror Deck #768981 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

• Primary strategy: Midrange
• Secondary strategies: Control, Toolbox
• Format: ocg

Legality

Main 56 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Xyz pressure from Umbral Horror / Masquerade Number monsters (Number C104: Umbral Horror Masquerade 3000 ATK, Number 104: Masquerade V 2700 ATK) built through Umbral Horror searches; Number 69: Heraldry Crest - Dark Matter Demolition (3100 ATK) and Number C104: Umbral Horror Masquerade Victory as follow-up beaters
• Turn 1 (going first): Open a starter (Thousand Umbral Horror, V Umbral Horror, Gorgonic Umbral Horror, or Seventh Ascension), search an Umbral Horror via Barian's Seventh Untopia or V Umbral Horror, and reach a 2-Level-4 Xyz with Shining Umbral Horror and Mulcharmy material support
• Turn 2 (going second): Hold Ash Blossom, Ghost Ogre & Snow Rabbit, Nibiru, Droll & Lock Bird and Solemn Judgment to interrupt the opponent's first Summon, then continue the Umbral Horror engine through the Xyz line
• Recovery: Recover through Barian's Hope and Barian's Seventh Untopia search, and through Number 104: Masquerade V and Number C104 Masquerade material effects that can add Barian's cards back
• After siding: Not assessable: the list has 0 Side Deck cards, so there is no post-side plan in the export

Why it scores here

This deck is Illegal in OCG as exported: Seventh Tachyon is run 3 times against a limit of 1 and Ash Blossom & Joyous Spring 3 times against a Semi-Limited limit of 2, so the score is capped at 30 and labelled structural-only. Its structural read comes from the system: the archetype core (17 Umbral Horror and Masquerade-adjacent copies) gives about an 85% chance of at least one archetype card in a 5-card opening hand (Inferred), and the hand-trap and removal suite (10 hand traps, 28 removal-text cards) gives real interaction density. Against that, only 9 of 56 Main cards are exact-name Umbral Horror (12.7% purity), so the engine is split across Barian's, Mulcharmy, Seventh and Dominus cards, and there is no side deck and no recorded board data to measure a median or ceiling. Archetype popularity (for example Mulcharmy Fuwalos at 85% inclusion) confirms the list is real and played, but earned no points, and no card scores were averaged into the deck score.

Dimension scores

How the score was computed

Strategy profile: Midrange primary, Control secondary (structural read uses Midrange weights; Control is disclosed as the secondary plan). Structural ≈ 52, Going First ≈ 55, Going Second ≈ 56, Meta = provisional, Tournament Reliability ≈ 48. Modifiers: banlist exposure (copy-limit violations) (-6); engine conflicts / low archetype purity (-5). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers = 0.80*52 + 0.20*48 - 11 ≈ 40, then capped at 30 because the deck is Illegal (theoretical/structural-only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.85 · key two-card combo ≈ — · full-brick estimate ≈ 0.15 (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 dense enough to usually open a starter (Inferred ~85%)
• Layered interaction: 10 hand traps, Solemn Judgment and several negation traps (Inferred)
• Multiple Xyz finishers with 2700 to 3100 ATK in the Extra Deck (Verified stats)
• Real and played: archetype-core cards show 55% to 85% inclusion in usage statistics (Verified)

Weaknesses

• Illegal as built: copy-limit violations on Seventh Tachyon and Ash Blossom (Verified)
• Low archetype purity (12.7%) suggests an incoherent engine across sub-archetypes (Verified composition)
• No Side Deck, so no post-side plan (Verified)
• No recorded boards, so no measured combo floor or ceiling (Verified data gap)

Critical choke points

• Reliance on Barian's Seventh Untopia / V Umbral Horror for search access
• Limited to one copy of Solemn Judgment and Droll & Lock Bird, with no backup for Limited-card interaction
• Illegal copy counts must be cut before the list can be played in OCG

Recommended changes

Evidence & confidence

• Verified: Legality: Seventh Tachyon 3 copies vs limit 1; Ash Blossom 3 copies vs Semi-Limited 2; Main 56 / Extra 15 / Side 0 within the OCG size rules; Card text and stats for the listed cards; Usage statistics: Mulcharmy Fuwalos 85%, Ash Blossom 81%, core Umbral Horror cards 66% to 81%
• Inferred: P(at least one core card in opening hand) ≈ 0.85; Brick rate ≈ 0.15 for the core in a 5-card hand; Interaction density from role tags and negation/removal text
• Provisional: Meta Power and matchup fit: no dated metagame sample or tournament link
• Data gaps: No combos supplied; combo floor, median and ceiling are text-only inference No tournament link, so archetype meta-share and per-pilot record are absent No win-rate telemetry (going-first/second, matchup, brick/starter/OTK rates) Meta Power is Provisional unless a dated metagame sample is supplied Deck has no title and no Side Deck, so the post-side plan cannot be assessed