Ruin and Demise Deck #225727 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

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

• Primary strategy: Combo
• Secondary strategies: Midrange, Toolbox
• Format: master-duel

Legality

Main 45 / Extra 15 / Side 0 — status: Illegal. 4 violation(s).

Identity & game plan

• Win condition: Ritual Summon Ruin, Queen of Oblivion or Demise, King of Armageddon / Supreme King, then convert the board with 2400-3000 ATK boss monsters and Demise's destroy-all effect.; Synchro and Link beatdown (Stardust Dragon, Chaos Angel, Draco Berserker, Black Luster Soldier) once the Ritual boss is established.
• Turn 1 (going first): Open a Ritual starter (Pre-Preparation of Rites, Cycle of the World, End of the World, Impcantation Inception), search the Ritual boss, and Ritual Summon it. Hold Ash Blossom or Ghost Belle as the interaction layer.
• Turn 2 (going second): Use hand traps (Ash Blossom, Ghost Belle, Infinite Impermanence, Maxx C) to slow the opponent's board, then Ritual Summon through a surviving Ritual starter.
• Recovery: Recur Ritual monsters and Ritual spells from the GY via Impcantation Talismandra / Candoll, Monster Reborn, and Dyna Mondo. Depends on GY access surviving disruption.
• After siding: Not supported: the deck runs zero side-deck cards, so no post-side plan exists in the evidence.

Why it scores here

The deck's consistency rests on a 22-copy Ruin and Demise core, which the hypergeometric estimate puts at about 97% to have at least one piece in a 5-card opening hand, and 14 searcher-text cards. The ceiling comes from a Ritual boss that can wipe the board and be followed by Synchro and Link beatdown, which gives a plausible conversion path. Interaction is layered across seven hand traps and several negation or removal effects, though two of those cards exceed their copy limits. Scoring is on the system, not an average of card scores, and popularity was not used as evidence of strength. Because the list is illegal and no combo, guide, or tournament data exists, the score is capped at a structural-only 30.

Dimension scores

How the score was computed

Strategy profile: Combo profile only; Midrange not blended. Structural ≈ 60, Going First ≈ 55, Going Second ≈ 60, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: banlist_exposure (-8); no_side_deck (-4). Final formula: Illegal deck: min(0.80*Structural + 0.20*TournamentReliability + Modifiers, 30) = min(0.80*60 + 0.20*45 - 12, 30) = min(45, 30) = 30 (Meta provisional, legality cap applied)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.97 · 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 archetype-core presence (22 copies) makes a starter appear in most opening hands
• Layered interaction: seven hand traps plus Herald and Called by the Grave style negation and removal
• Ritual bosses at 2400-3000 ATK with Demise's destroy-all give a high closing ceiling
• Synchro and Link Extra Deck options add beatdown routes after the Ritual boss is established

Weaknesses

• Illegal list: four cards exceed copy limits or are Forbidden in-format
• No side deck, so there is no post-side plan
• Low exact archetype purity (0%) and heavy off-archetype staples weaken engine cohesion
• Single-copy Ritual starters (Cycle of the World, End of the World at 2 copies) make the engine fragile to a single disruption

Critical choke points

• Ritual Summon requires a Ritual spell plus Tribute math, so one hand trap on the starter breaks the line
• Ritual monsters in the GY are the recovery route, so GY-based hate or banish effects remove the recovery plan
• Illegal copy counts (Maxx C, Herald) must be fixed before the list can be played at all

Recommended changes

Evidence & confidence

• Verified: Deck is Illegal: Maxx C 2 copies (limit 1), Herald of the Arc Light 2 copies (limit 1), Called by the Grave and PSY-Framelord Omega Forbidden; Main 45 and Extra 15, within Master Duel size rules; Side 0; Archetype-core group 22 copies with P(at least one in 5-card hand) = 0.9725; 14 searcher-text cards, 7 hand traps, and 6 negation-text cards in the list
• Inferred: Engine consistency is plausible from the core density, but the 2-copy Ritual starters are fragile; Interaction layering is strong on paper; over-limit copies are counted as present; Going-second hand-trap plan is plausible from P(at least one hand trap in 6 cards) = 0.6611; Closing power from 2400-3000 ATK bosses and Demise's destroy-all effect
• Provisional: Meta Power and matchup fit: no dated metagame sample or tournament context exists; Tournament reliability: built from inferred consistency and absent post-side plan
• 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 and going-second splits, matchup results, and brick rates are unknown Meta Power is provisional without a dated metagame sample No guides attached for the archetype Zero side-deck cards in the export; post-side performance cannot be assessed