Umbral Horror Deck #769654 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

Final Contextual Deck Power: 25/100 (±8 · Confidence: Low)

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

Legality

Main 55 / Extra 15 / Side 0 — status: Illegal. 3 violation(s).

Identity & game plan

• Win condition: Xyz pressure from the Umbral Horror / Masquerade / Number shell, with Galaxy and Utopia Xyz as finishers; Hand-trap and removal disruption (Raigeki, Infinite Impermanence, Gorgonic) followed by a single Xyz on board
• Turn 1 (going first): Open on Thousand Umbral Horror, V Umbral Horror or Gorgonic to search the Umbral Horror core and Barian's Seventh Untopia, then Xyz Summon through the Untopia limit (exception for Number monsters)
• Turn 2 (going second): Use Ash Blossom, Droll & Lock Bird, Nibiru and Infinite Impermanence to disrupt the opponent's first summons, then rebuild through the searchers
• Recovery: Mulcharmy Fuwalos/Purulia/Meowls draw engines and Shining Umbral Horror recycle monsters from hand/GY to rebuild the board
• After siding: Not evaluable: the deck list has no side deck (side_count 0)

Why it scores here

The deck's floor and median are carried by a large searcher and draw-engine package: the Umbral Horror and Mulcharmy cards plus Barian's Seventh Untopia give a P(at least one archetype core card in a 5-card opening hand) of about 0.91, which is the main reason D1 is above the mid-band (Inferred). Interaction is dense for a non-control list (10 hand traps and 16 removal-text cards by role tag), and this is what lifts D7, though the negation coverage is mostly single-target and does not layer well. Conversion is the weak point: no recorded boards exist, so the Xyz finisher line is text-only and D3 and D4 stay near the middle, and the side deck is absent, so D12 cannot be credited. The deck is not scored higher for Umbral Horror being a popular archetype (usage stats confirm it is real and accessible, not strong), and no card scores were averaged. Because the list is illegal (three over-limit or Forbidden entries), the structural score is reported as theoretical only and the final score is capped at 25.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 53, Going First ≈ 48, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist and copy-limit exposure (-12). Final formula: No-meta formula: 0.80*Structural(53) + 0.20*TournamentReliability(45) = 51 before modifiers; modifiers -12 give 39; Illegal cap applied, so reported as 25 (theoretical/structural only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.91 · 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

• Large, redundant searcher and draw package gives high archetype core access
• Layered hand-trap and removal coverage (10 hand traps, 16 removal-text cards)
• Extra Deck is full of Xyz finishers with multiple routes via Masquerade and Number monsters

Weaknesses

• List is illegal: Triple Tactics Talent is Forbidden, Seventh Tachyon 3 copies vs 1 legal, Ash Blossom 3 copies vs 2 legal
• Low exact-name archetype purity (11.4%); engine split across many sub-archetypes
• No side deck, so no post-side plan and no way to adapt to matchups
• Xyz-only Extra Deck and Untopia limit create conflicts between lines

Critical choke points

• Barian's Seventh Untopia limits Extra Deck Special Summons to 2 per turn, which can stall Xyz lines
• Heavy reliance on Ash Blossom and Infinite Impermanence for going-second disruption, both over or at the copy limit

Recommended changes

Evidence & confidence

• Verified: Main 55 / Extra 15 / Side 0 sizes are within OCG size rules; Triple Tactics Talent is Forbidden and run once; Seventh Tachyon run 3 vs 1 legal; Ash Blossom run 3 vs 2 legal; Archetype spread: 8 exact Umbral Horror copies, 62 off-archetype copies; Extra Deck is 14 Xyz and 1 Fusion
• Observed: Usage stats: Mulcharmy Fuwalos 85%, Ash Blossom 81%, Thousand Umbral Horror 74% inclusion across archetype decks
• Inferred: Opening-hand access to the archetype core is about 0.91 (hypergeometric); Hand-trap coverage on going second is about 0.72 (hypergeometric); Going-second disruption and Xyz finisher lines are judged from card text only
• Provisional: Meta Power is null; no dated metagame sample supplied; Matchup fit (D13) is provisional with no tournament data
• 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 and brick rates are Inferred or Unknown No side deck supplied: post-side plan and D12 cannot be scored Meta Power is Provisional unless a dated metagame sample is supplied