Umbral Horror Deck #770960 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 61/100 (±6 · Confidence: Medium)

• Primary strategy: Midrange
• Secondary strategies: Combo, Xyz engine, Interaction-heavy
• Format: ocg

Legality

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

Identity & game plan

• Win condition: Xyz boss monsters (Number C104: Umbral Horror Masquerade Victory 3000 ATK, Number 69: Heraldry Crest - Dark Matter Demolition 3100 ATK, Number 104: Masquerade V 2700 ATK) reached through the Barian's Seventh Untopia and Umbral Horror search engine; CXyz Hope Chaos Barian Dragon scaling and Number F0 / Number 65 / Number 96 board-control Xyz lines
• Turn 1 (going first): T1 search an Umbral Horror or Barian's Spell (Seventh Untopia, Barian's Hope, Chaos Draw) via a monster's on-summon search, then a Level 4 Umbral Horror summon into a Masquerade Xyz; hold Ash Blossom and Infinite Impermanence for the first opponent response
• Turn 2 (going second): Six-card hand with Ash Blossom, Maxx C, Droll & Lock Bird and Infinite Impermanence to strip the opponent's first non-Ash turn, then rebuild through Thousand Umbral Horror and the Extra Deck Xyz
• Recovery: Banish Thousand Umbral Horror, Garbage Golem and Masquerade V from the GY as Xyz material and search fuel; Barian's Hope can revive a Masquerade Xyz from the GY
• After siding: Not available: the deck runs no Side Deck, so there is no post-side plan

Why it scores here

The deck reliably opens a live engine: the archetype core (19 copies) gives about 97% chance of at least one core card in a 5-card opening hand, and 13 searcher-text cards give about 88%. Its strength is redundancy across routes: Umbral Horror monsters search the Barian's Seventh Untopia and Barian's Hope, which feed a 15-card all-Xyz Extra Deck with several negate and removal Xyz. Interaction is layered (Ash Blossom x2, Infinite Impermanence x3, Barian's Seal x2, Maxx C, Droll & Lock Bird, Crossout Designator), so the deck can keep going after disruption. The score is held down by no recorded boards (median and ceiling are structural inference only), a 16.4% exact-name archetype purity spread over about seven sub-archetypes, singleton utility slots that brick hands, and zero Side Deck slots. Archetype popularity earned no points, and card scores were not averaged into the deck score.

Dimension scores

How the score was computed

Strategy profile: Midrange primary; Combo secondary, not blended in numerically (no recorded boards to weight Combo). Structural ≈ 64, Going First ≈ 68, Going Second ≈ 70, Meta = provisional, Tournament Reliability ≈ 58. Modifiers: banlist_exposure (-1); engine_spread (-1). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional, no dated metagame sample): 0.80*64 + 0.20*58 - 2 = 60.8, rounded to 61

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.97 · key two-card combo ≈ — · full-brick estimate ≈ 0.03 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Core engine is near-certain to appear in the opening hand (0.97 for the 19-copy archetype group)
• Interaction is layered across hand traps, spell/trap negation and Xyz negation effects
• Extra-Deck Xyz boss monsters at 2700 to 3100 ATK with built-in negation or destruction
• GY recursion through Thousand Umbral Horror, Garbage Golem, Masquerade V and Barian's Hope

Weaknesses

• No Side Deck: zero post-side adaptability
• Exact-name archetype purity is only 16.4%; engine spread across many sub-archetypes
• Six singleton utility slots and 7 hand-trap-tagged cards raise brick and dead-card risk
• No recorded boards, so the combo ceiling and floor are not measured

Critical choke points

• Masquerade Xyz on the field is the key bridge to the Number boss monsters; interruption before Xyz Summon ends most lines
• Searchers that find Barian's Seventh Untopia and Barian's Hope are needed to refill after disruption
• Limited single copies (Maxx C, Droll, Crossout, Seventh Tachyon) remove one choice each if drawn dead

Recommended changes

Evidence & confidence

• Verified: Legal OCG deck: 40 Main, 15 Extra, 0 Side; no size or banlist violations; Copy limits respected: Ash Blossom Semi-Limited 2 copies; Maxx C, Droll, Crossout and Seventh Tachyon 1 copy each (Limited); Archetype core: 19 copies; usage stats show 7 of 13 core cards present (53.8%)
• Inferred: Archetype core P(>=1 in 5-card hand) 0.97 and searcher-text 0.88 from hypergeometric estimates; Interaction density and negation quality from card text; Going-second hand-trap coverage 0.71 from hypergeometric estimate
• Provisional: Meta power (no dated metagame sample); Matchup fit and tournament reliability; Combo floor and median (no boards)
• 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 (going-first/second, matchup, brick and starter rates) Meta Power is provisional without a dated metagame sample Deck title is null in the export