Umbral Horror Deck #772180 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 59/100 (±6 · Confidence: Medium)

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

Legality

Main 40 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Summon Level 4 Xyz monsters (Masquerade V, Ryzeal Detonator, Dark Matter Demolition) off Umbral Horror and Barian's searches, then close with 2800-3100 ATK boards; Thousand Umbral Horror and V Umbral Horror open the engine by Special Summoning themselves and searching Umbral Horror monsters
• Turn 1 (going first): Open with Barian's Seventh Untopia or Thousand/V Umbral Horror, search a Barian's/Umbral Horror monster, and reach a Level 4 Xyz through the Umbral Horror summon chain; keep Ash Blossom or Infinite Impermanence up if possible
• Turn 2 (going second): Hold 11 hand-trap and negation effects (Ash Blossom, Effect Veiler, Ghost Ogre, Droll & Lock Bird, Maxx C, Infinite Impermanence, Barian's Seal) to interrupt the opponent's first board, then rebuild through the searchers
• Recovery: Recycle Umbral Horror and Barian's monsters from the GY through Dododo, Gorgonic and Masquerade Xyz effects; the deck has three 3-copy starters and 17 searcher-text cards
• After siding: No side deck is registered in the export, so there is no post-side plan to evaluate; any sideboarding must be built and tested by the player

Why it scores here

The deck reliably opens its engine: the 18-copy archetype core has an estimated 0.96 chance of at least one card in a 5-card opening hand, and the 17 searcher-text cards give about 0.95 odds of a search (Inferred). Its 11 hand-trap and negation effects give it strong interruption (D5, D7) and an 88% chance of at least one hand-trap in a 6-card going-second hand (Inferred). Conversion is the weak point: there are no recorded boards, so the ceiling and median are text-only inferences and are scored with low weight. Four Extra Deck Xyz monsters (Number C104 Victory at Level 5, CXyz Hope Chaos Barian Dragon at Level 7, Mereologic Aggregator at Level 9, Divine Arsenal AA-ZEUS at Level 12) need Xyz materials of levels the list does not contain, which lowers D11 and the fraction of extra slots that can be used. Popularity and the 0.96 core statistic do not earn points by themselves, and the score comes from consistency, interaction and resilience on the deck as a system, not from averaging card scores.

Dimension scores

How the score was computed

Strategy profile: Midrange primary with Combo secondary; D13 dropped and weights renormalized over 95 because meta is provisional. Structural ≈ 63, Going First ≈ 64, Going Second ≈ 68, Meta = provisional, Tournament Reliability ≈ 58. Modifiers: banlist exposure (-2); engine conflicts (-1). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers, with Structural = 63.3 (D13 dropped, renormalized /95), TR = 58, modifiers = -3 => 59.2 rounded to 59 (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.96 · 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

• Eleven hand traps and negation effects give resilient interruption on both turns
• Three 3-copy starters (Thousand, V, Gorgonic) plus a double searcher (Barian's Seventh Untopia) give consistent openings
• High-ATK Level 4 Xyz finishers (Masquerade V, Ryzeal Detonator, Dark Matter Demolition) close games

Weaknesses

• Four Extra Deck Xyz monsters (Levels 5, 7, 9, 12) have no matching-level material in the list and are effectively dead slots
• Zero side deck cards, so no post-side adaptation
• Low exact-name purity (12.7%) means the engine is spread across several sub-archetypes

Critical choke points

• Barian's Seventh Untopia (2 copies) is the main searcher and engine enabler
• Level 4 Xyz summons depend on Umbral Horror starters staying alive through hand traps

Recommended changes

Evidence & confidence

• Verified: Legal status, 40 Main / 15 Extra / 0 Side, all restricted copies within legal limits; Level spread shows only one Level 5, 7, 9 and 12 monster (the Xyz themselves); Archetype purity 12.7% and archetype spread from composition
• Observed: Usage statistics: core inclusion for Ash Blossom 80%, Thousand Umbral Horror 75%, Gorgonic 70%, V Umbral Horror 67.5%
• Inferred: Starter access 0.96 and searcher access 0.95 from hypergeometric estimates; Interaction density and going-second hand-trap coverage from card text; Structural scores for D1 through D14 as above
• Provisional: Meta Power (null, no dated sample); D13 matchup and format fit (placeholder, dropped from Structural)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and match record are absent No side deck cards in the export, so post-side performance cannot be scored Usage-statistics in this deck flags conflict with the card list for Number 104: Masquerade V, Number F0 and CXyz Hope Chaos Barian Dragon, which are present in the deck; core-card gap analysis is therefore unreliable No win-rate telemetry (going-first/second, matchup, brick rate) exists in YGOVN