Fiendsmith Deck #745096 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

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

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

Legality

Main 40 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Fiendsmith and Yubel boss monsters (Fiendsmith's Desirae, Fiendsmith's Lacrima, Yubel, Phantom of Yubel) built from Yubel and Fiendsmith engine starters; Unchained and Fiend Link/Fusion boards via Unchained Soul Lord of Yama and Unchained Soul of Rage
• Turn 1 (going first): Turn 1 Nightmare Throne or Samsara D Lotus / Opening of the Spirit Gates to reach a Yubel or Fiendsmith starter, backed by Ash Blossom, Droll and Maxx C as hand interaction
• Turn 2 (going second): Hand traps (Infinite Impermanence, Ash Blossom, Droll and Maxx C) on the opponent's first summon, then rebuild a board with Fiend-family Link and Fusion summons
• Recovery: Recover via Engraver and Spirit of Yubel searches from the Deck and GY, and Mulcharmy draw effects when the hand empties
• After siding: No side deck is registered (Side Deck size 0), so there is no post-side plan to evaluate

Why it scores here

The list is Illegal because Called by the Grave is a Forbidden card run for one copy in master-duel, so it is capped to a structural-only score of 30 instead of receiving a normal Final Contextual score. Structurally the deck can reach a live Yubel or Fiendsmith starter fairly often: the 3-copy starters (Samsara D Lotus, Nightmare Throne, Opening of the Spirit Gates) have about a 34% chance of appearing in the opening 5, and searcher text covers almost every hand (about 97%). Combo evidence is thin: three recorded boards, all of unknown gameplay, with a best line of 41 and a median of 31, and every board summary is zero, so the ceiling and floor are reported separately and are not averaged. Popularity and usage stats were not counted as power, and card scores were not averaged into the deck score. The Midrange weight profile was used with a -8 modifier for banlist exposure and engine conflict across Yubel, Fiendsmith, Sacred Beast and Unchained, which reach only 14.5% exact-name purity.

Dimension scores

How the score was computed

Strategy profile: Midrange primary, Combo secondary (not blended numerically; Midrange weights used). Structural ≈ 46.3, Going First ≈ 45, Going Second ≈ 38, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-5); engine conflicts (-3). Final formula: No reliable metagame: 0.80*Structural + 0.20*TournamentReliability + Modifiers = 0.80*46.3 + 0.20*40 - 8 = 37, then capped to 30 because legality is Illegal (theoretical/structural only)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.34 · key two-card combo ≈ — · full-brick estimate ≈ — (all Inferred)
• Combo output: best PowerIndex 41, median 31, board-per-starter 0
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Dense searchers and a broad hand-trap suite (Infinite Impermanence, Ash Blossom, Droll, Maxx C, Crossout Designator) give interaction on both turns
• Compact 40-card main with a 15-card Extra Deck and a copy spread that keeps key starters at 2 to 3 copies

Weaknesses

• Illegal in master-duel because of Called by the Grave
• Engine split across Yubel, Fiendsmith, Sacred Beast and Unchained with 14.5% exact-name purity
• No side deck, so no post-side plan
• Recorded combo evidence is thin: 3 boards, all unknown gameplay, all zero board output

Critical choke points

• Yubel or Fiendsmith starter access (about 34% per 3-copy card in 5 cards) is the single line the deck depends on
• Forbidden card Called by the Grave must be removed before the deck can be considered legal

Recommended changes

Evidence & confidence

• Verified: Called by the Grave is Forbidden in master-duel and run for 1 copy, making the deck Illegal; Main Deck is 40 cards and Extra Deck is 15 cards, both within size rules; Droll & Lock Bird (2) and Phantom of Yubel (2) are within Semi-Limited limits; Maxx C and Crossout Designator are within Limited limits
• Observed: Three recorded combo boards with PowerIndex 28-41 and median 31, all unknown gameplay; Average end-hand of 1 and zero board output across recorded boards
• Inferred: Opening-hand starter access of about 34% per 3-copy card (hypergeometric); Interaction and negation quality from card text (Ash Blossom, Droll, Maxx C, Infinite Impermanence); Engine conflict and brick risk from the 14.5% exact-name purity and the off-archetype split
• Provisional: Meta Power (null) and matchup fit (D13), since no tournament link or dated meta sample exists
• Data gaps: Illegal list (Called by the Grave, Forbidden) caps the score; structural-only evaluation usage statistics marks Fiendsmith's Requiem, S:P Little Knight, Moon of the Closed Heaven, Fiendsmith's Sequence, Fiendsmith's Lacrima and D/D/D Wave High King Caesar as in this deck=false, yet the deck's cards list runs all six in the Extra Deck; core-card presence 50 is therefore unreliable and likely a name or ID matching mismatch No tournament link, so archetype meta-share and per-pilot match record are absent No win-rate telemetry (going-first/second, matchup, brick or starter rates); those signals are Inferred No side deck registered; post-side performance absent Combo evidence is thin: 3 boards, all with unknown gameplay and zero board summaries Meta Power is Provisional unless a dated metagame sample is supplied