Umbral Horror Deck #768470 — Yu-Gi-Oh! OCG
50 Main, 20 Extra, incl. Fiendsmith Engraver x3, K9-17 Izuna x3, Mementotlan Angwitch x3. Created Oct 20, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/20/2026
Main Deck (50)
- Droll & Lock Bird x1
- Fabled Lurrie x1
- Fiendsmith Engraver x3
- K9-17 Izuna x3
- K9-66a Jokul x1
- K9-66b Lantern x1
- K9-ØØ Lupis x1
- Lacrima the Crimson Tears x1
- Mementoal Tecuhtlica - Combined Creation x1
- Mementotlan Akihiron x1
- Mementotlan Angwitch x3
- Mementotlan Dark Blade x1
- Mementotlan Ghattic x1
- Mementotlan Goblin x1
- Mementotlan Mace x1
- Mementotlan Shleepy x2
- Mementotlan Tatsunootoshigo x3
- Mementotlan-Horned Dragon x1
- Mulcharmy Fuwalos x3
- Mulcharmy Meowls x1
- Mulcharmy Purulia x1
- Ash Blossom & Joyous Spring x3
- "A Case for K9" x1
- Fiendsmith's Tract x1
- Mementomictlan x1
- Mementotlan Bone Party x3
- Mementotlan Fusion x3
- Raigeki x3
- Infinite Impermanence x3
Extra Deck (20)
- Fiendsmith's Desirae x1
- Fiendsmith's Lacrima x1
- Guardian Chimera x1
- Mementomictlan Tecuhtlica - Creation King x2
- Mementotlan Twin Dragon x1
- Fiendsmith's Requiem x1
- Fiendsmith's Sequence x1
- I:P Masquerena x1
- S:P Little Knight x1
- W:P Fancy Ball x1
- Chaos Angel x1
- Artifact Durendal x1
- CXyz N.As.Ch. Knight x1
- Divine Arsenal AA-ZEUS - Sky Thunder x1
- K9-17 "Ripper" x1
- N.As.H. Knight x1
- Number 104: Masquerade x1
- Number C104: Umbral Horror Masquerade x1
- Super Starslayer TY-PHON - Sky Crisis x1
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Deck — Deck Power Evaluation
Final Contextual Deck Power: 25/100 (Confidence: Low)
- Primary strategy: Midrange
- Secondary strategies: Toolbox
- Format: ocg
Legality
Main 50 / Extra 20 / Side 0 — status: Illegal. 4 violation(s).
Identity & game plan
- Win condition: Memento board pressure: Mementomictlan Tecuhtlica - Creation King (3000 ATK), Mementotlan Twin Dragon (2800 ATK), Mementotlan-Horned Dragon (2850 ATK) and Mementoal Tecuhtlica - Combined Creation (5000 ATK, 1 copy), reached through Memento Fusion/Special Summon text; Fiendsmith's Lacrima (-600 ATK to opponent monsters) and Chaos Angel / Divine Arsenal / Super Starslayer as Extra Deck boards
- Turn 1 (going first): Mulcharmy draw/searcher engine plus Memento search (Mementotlan Angwitch, Ghattic, Akihiron) to reach a Memento Fusion or Special Summon
- Turn 2 (going second): Hand traps (Ash Blossom, Infinite Impermanence, Droll & Lock Bird) to stop the opponent's first play, then Raigeki or Chaos Angel for board control
- Recovery: Memento recursion from the GY (Mementotlan Shleepy, Bone Party, Tatsunootoshigo) and Mulcharmy draws; depends on several non-overlapping engines being live
- After siding: Not evaluable: side_count is 0, so there is no post-side plan
Why it scores here
The deck mixes three engines (Memento, Fiendsmith, K9) that share few cards, so the core starter density is spread thin: the archetype-core group is only 69% likely to appear in a 5-card opening hand, and 18 of 29 distinct main-deck cards are singletons. Its interaction suite (Ash Blossom and Infinite Impermanence at 3 copies, Droll & Lock Bird, Raigeki, and Number C104 in the Extra Deck) gives the deck a reasonable chance of surviving a single disruption, and the Memento and Mulcharmy recursion/draw pieces support a grind game. Its high-end offense (Creation King, Twin Dragon, Horned Dragon, Combined Creation) is real but has no recorded combo boards, so the ceiling is text-inferred only. The score is held to 25 because the list is Illegal under the OCG rules: three cards exceed their copy limits and the Extra Deck is 5 cards over its 15-card maximum; under the structural rubric it would otherwise sit near 50. The score was not raised by the deck's popularity (Umbral Horror is a top-level archetype with 4 of 14 core cards present, which only confirms it is real and accessible), and card scores were not averaged into the result.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 52 | P(≥1 of the 10 archetype-core cards in a 5-card opening hand) ≈ 0.69; engines conflict across Memento, Fiendsmith and K9, and only 4 of 14 usage-core cards are present (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 48 | 18 singleton main-deck slots, 19 searcher-text cards with P(≥1 in hand of 5) ≈ 0.92, and a proxy full-brick rate of ≈ 0.31 (Inferred) |
| D3 | Combo Conversion & Ceiling | 55 | No recorded boards; ceiling is inferred from Creation King, Twin Dragon and Horned Dragon card text only (Inferred) |
| D4 | Combo Floor & Median Output | 40 | No recorded boards, so median output cannot be measured; estimate kept near the middle of the range (Inferred) |
| D5 | Interruption Resilience & Route Redundancy | 62 | Three-copy Ash Blossom and Infinite Impermanence plus Droll & Lock Bird and Memento GY recursion give several independent answers (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 55 | Mulcharmy draw effects and Memento GY recovery support a grind game; no resource-signature data exists (Inferred) |
| D7 | End-Board & Interaction Quality | 58 | Raigeki, Infinite Impermanence, Number C104, Chaos Angel and Fiendsmith's Lacrima give layered end-board interaction; no interaction telemetry exists (Inferred from text) |
| D8 | Going-Second & Board-Breaking Power | 55 | Going-second plan rests on hand-trap density (7 cards; P(≥1 hand trap in 6) ≈ 0.62) and Raigeki/Chaos Angel for board breaking (Inferred) |
| D9 | Offensive Pressure & Closing Power | 62 | Several 2800–5000 ATK boss monsters in the Extra Deck, with Fiendsmith's Lacrima's -600 ATK field effect (Verified stat, Inferred closing) |
| D10 | Main Deck Efficiency & Flexibility | 45 | 50 main cards with 29 distinct cards, 3 non-Legal copy counts, and substantial off-archetype spread (purity 1.4%) reduce compactness (Verified composition) |
| D11 | Extra Deck Efficiency & Coverage | 30 | Extra Deck holds 20 cards against a 15-card maximum, and the engines compete for slots (Verified legality) |
| D12 | Side Deck Adaptability | 15 | No side deck (side_count 0), so there is no post-side adaptability to score (Verified) |
| D13 | Matchup Coverage & Format Fit | 45 | No tournament link and no dated metagame sample; archetype meta-share is absent (Provisional) |
| D14 | Pilotability & Error Tolerance | 45 | Three engines with many branching decision points and multiple restricted-card constraints raise pilot error risk (Inferred) |
How the score was computed
Strategy profile: Midrange profile used; Toolbox is a secondary tag only, not blended. Modifiers: none.
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