Umbral Horror Deck #772221 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

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

Legality

Main 51 / Extra 19 / Side 0 — status under the rules at evaluation time: Illegal. 5 violation(s).

Identity & game plan

• Win condition: Xyz pressure from the K9 and Vanquish Soul Xyz monsters (K9-X Ripper/M piercing, K9-X Werewolf multi-attack, Number C104 Victory, Number C101 family).; Vanquish Soul boards built through hand-revealing Special Summons, with Mulcharmy draw-lock as a late-game grind.
• Turn 1 (going first): Search Vanquish Soul pieces (Dr. Mad Love, Heavy Borger, Start!) and reveal-summon Vanquish Soul monsters into Xyz; K9 Lupis, Jokul and Lantern Normal Summon without tribute once the opponent holds 2 or more cards.
• Turn 2 (going second): Disrupt with Ash Blossom, Droll and Lock Bird, and Barian's Seal, then rebuild through Vanquish Soul revives and Stake your Soul!.
• Recovery: 17 searcher-text cards plus Vanquish Soul - Continue? and Start! refill the hand with engine pieces after a disruption.
• After siding: No Side Deck is listed, so no post-side plan can be evaluated.

Why it scores here

Scored as a system, not as an average of card scores, and explicitly not on popularity: the deck is Illegal (19 Extra Deck cards against a 15 maximum, and three cards run over their OCG copy limits), so it is treated as theoretical or structural only. Its engine is reasonably accessible, with 17 searcher-text cards giving about an 88 percent chance of at least one searcher in a 5-card opening (Inferred), and it has several hand traps and Xyz lines that give it resilience. The weak points are the 45 scores on hand quality and going-second conversion, the absence of any side deck, and a list that shares only 3 of 13 core archetype cards with the Umbral Horror usage profile, so it is three sub-archetypes loosely glued together rather than a single engine. No combo, tournament or win-rate data exists, so the median and ceiling are text-only inferences. The final score is capped at 30 by the legality rule.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 51, Going First ≈ 50, Going Second ≈ 45, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Banlist exposure (-5); Extra Deck overflow (-3). Final formula: No reliable metagame, so Meta is provisional: 0.80*Structural(51) + 0.20*TournamentReliability(45) = 49.8; context modifiers -8 gives 41.8; Illegal-deck legality cap applied to 30 (theoretical or structural only, not a normal Final Contextual score)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.88 · 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

• Dense searcher suite (17 cards) keeps engine pieces reachable
• Two independent engines (Vanquish Soul revive, K9 Normal Summon and Xyz) give some redundancy
• Hand traps and negation (Ash Blossom, Droll and Lock Bird, Barian's Seal, Number C106) cover common interruptions
• Strong Xyz top end: K9-X Ripper/M, K9-X Werewolf, Caesar Valius, Number C104 Victory

Weaknesses

• Illegal as built: Extra Deck overflow and three cards over copy limits
• Zero Side Deck, so no post-side plan and no answer to a hostile matchup
• Only 3 of 13 Umbral Horror core cards present; the list is not the archetype-standard build
• Heavy reliance on reveal-based engine pieces that bricks on hands without multiple monsters

Critical choke points

• Vanquish Soul engine is blocked by a missing reveal partner in hand (single-piece hands)
• Extra Deck over 15 must be cut before the list can be played at all
• Ash Blossom and Izuna both capped at 2 copies and Razen at 1, so 4 main-deck cards must come out

Recommended changes

Evidence & confidence

• Verified: Extra Deck holds 19 cards (limit 15) in OCG; Ash Blossom and K9-17 Izuna run 3 copies against 2 legal; Vanquish Soul Razen runs 3 against 1; Side Deck is empty; Searcher-text count 17 and archetype share absent from the export
• Inferred: Engine accessibility and brick rate from hypergeometric estimates; Going-second hand trap density; Interaction breadth from card text; Closing power from ATK and piercing text
• Provisional: Meta Power and matchup fit (no dated metagame sample)
• Data gaps: No combos supplied, so combo floor, median and ceiling are text-only No tournament link, so archetype meta-share and per-pilot records are absent No win-rate telemetry (going-first or second split, matchup, brick and OTK rates) Meta Power is provisional without a dated metagame sample No Side Deck, so post-side performance cannot be assessed