Umbral Horror Deck #769664 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 30/100 (±10 · Confidence: Low)

• Primary strategy: Midrange
• Secondary strategies: Control, Xyz mechanic
• Format: ocg

Legality

Main 53 / Extra 15 / Side 0 — status: Illegal. 4 violation(s).

Identity & game plan

• Win condition: Umbral Horror and Masquerade Xyz end-boards (Number 104 / Number C104 / Heraldry-type Xyz) that convert a starter into a 2700-3100 ATK board (Inferred from card text); Barian's Seventh Untopia / Seventh Ascension searches into a 2-Xyz-per-turn Extra Deck pressure line (Inferred)
• Turn 1 (going first): Open a core Umbral Horror starter, search a second Umbral Horror via V Umbral Horror or Gorgonic Umbral Horror, and Xyz into a Masquerade boss; hold Ash Blossom and Droll for the opponent's first activations (Inferred)
• Turn 2 (going second): Use the six-card hand to present Ash Blossom, Infinite Impermanence, Evenly Matched and Droll & Lock Bird against the opponent's opening Summon, then rebuild through Thousand or Shining Umbral Horror (Inferred)
• Recovery: Recover through Umbral Horror monsters returning from the GY and Barian's Seventh Untopia searches, which can refill hand after a broken opening (Inferred)
• After siding: Not evaluable: the deck runs zero side-deck cards, so there is no post-side plan at all

Why it scores here

The 19-copy Umbral Horror core gives this list a high probability of at least one core starter in the opening hand (P ≈ 0.90, Inferred), and a searcher-text group of 17 cards keeps the engine reaching its Xyz finishers. Interaction is dense for a 53-card main, with 10 hand traps and 13 negation-text cards, which earns credit on end-board interaction and going-second pressure. Floor and median output are scored low because the evidence contains no parseable recorded boards, so combo conversion is a text-only Inferred read. The list is structurally oversized and over the copy limit on four cards, including two Forbidden cards, so it is capped as a theoretical, structural-only score. Popularity did not earn points: the archetype core usage stats only confirm the list is real, and the final score is built from the 14 system dimensions, not an average of its individual card scores.

Dimension scores

How the score was computed

Strategy profile: Midrange primary, Control secondary, disclosed; Structural uses the Midrange profile only. Structural ≈ 52.5, Going First ≈ 50, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist_exposure (-6); no_side_deck (-4); no_combo_evidence (-2). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability = 0.80*52.5 + 0.20*45 = 51; modifiers -12 gives 39; Illegal status caps the final at 30 and the evaluation is theoretical/structural-only

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.9 · key two-card combo ≈ — · full-brick estimate ≈ 0.1 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Core engine density: 19 Umbral Horror copies give about 0.90 chance of a core starter in opening hand (Inferred)
• Dense interaction: 10 hand traps and 13 negation-text cards
• High-ATK Xyz finishers at 2700 to 3100 ATK

Weaknesses

• Illegal list: four cards over copy limit, two of them Forbidden
• No side deck at all
• Low exact-archetype purity (14.7%) and 19 generic cards in a 53-card main
• No recorded combos to validate the conversion ceiling or median

Critical choke points

• Dependence on Barian's Seventh Untopia and Umbral Horror searches to reach the Masquerade Xyz boss
• Seventh Tachyon and Ash Blossom are both cut or reduced by legality correction, which thins the search and hand-trap layer

Recommended changes

Evidence & confidence

• Verified: Legality: Illegal, four copy-limit violations, two Forbidden cards; Extra Deck: 15 Xyz, Masquerade and Heraldry boss ATK values; Main size 53, side 0, 19 Umbral Horror-core copies
• Observed: Usage stats: core Umbral Horror cards at 70 to 85% inclusion across the archetype
• Inferred: Starter-live probability ≈ 0.90 and brick proxy ≈ 0.097; Hand-trap going-second probability ≈ 0.73; Interaction density and resilience read from card text
• Provisional: Meta Power (null, no dated metagame); Matchup fit and format share (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 for going-first, going-second, matchup or brick/starter/OTK rates Meta Power is Provisional unless a dated metagame sample is supplied No side deck, so post-side scoring is structural only