Bystial Deck #678154 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

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

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

Legality

Main 41 / Extra 15 / Side 0 — status: Illegal. 1 violation(s).

Identity & game plan

• Win condition: Special Summon 2500-2900 ATK Bystial and Fiendsmith monsters (Bystial Saronir, Bystial Baldrake, Super Starslayer TY-PHON, Fiendsmith's Desirae) through hand-trap and searcher support, then close with Chaos Angel (3500) or Divine Arsenal AA-ZEUS (3000) (Inferred); Fiendsmith link and fusion chain (Fiendsmith's Requiem, Agnumday, Lacrima) building towards Necroquip Princess and Desirae (Inferred)
• Turn 1 (going first): Search Fiendsmith's Tract or Primite Lordly Lode for a second-copy starter, then use Droll and Maxx C to punish extra-deck summons with draws (Inferred, no combo evidence)
• Turn 2 (going second): Open with Ash Blossom, Droll & Lock Bird or Maxx C to answer the opponent's first summon, then rebuild a board with Bystial bosses from hand (Inferred)
• Recovery: Bystial Druiswurm and Bystial Saronir can banish from GY to Special Summon from hand, and Mulcharmy Fuwalos or Purulia refill cards after the board is cleared (Inferred)
• After siding: No side deck is registered (side_count 0), so there is no post-side plan (Verified)

Why it scores here

The deck reliably opens a searcher: P(at least one of its 15 searcher-text cards in a 5-card opening hand) is about 0.91, so the engine is accessible on paper (Inferred). Its power ceiling comes from the high-ATK Bystial and Fiendsmith bosses and the Chaos Angel and ZEUS extra-deck closers. It is not a coherent engine, though: only 9 of 56 main-deck cards are exact Bystial, and the rest spread across Fiendsmith, Primite, Mulcharmy and generic staples, so the deck's starters and bricks conflict. Six hand traps and six negation or removal cards give it real interaction, with a going-second hand-trap probability of about 0.64 (Inferred). No combo boards, usage statistics, tournament link or side deck are supplied, so there is no measured output and no post-side plan. The score is capped low because the list is illegal (Called by the Grave is Forbidden). It was derived from the system's consistency, interaction and closing power, not from averaging card scores and not from archetype popularity.

Dimension scores

How the score was computed

Strategy profile: Toolbox. Structural ≈ 50, Going First ≈ 45, Going Second ≈ 55, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist exposure (-8); engine conflicts (-4). Final formula: No reliable metagame: 0.80*Structural(50) + 0.20*TournamentReliability(40) = 48; modifiers -12 gives 36; Illegal-deck cap applied gives 30 (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

• Searcher density (15 cards, about 0.91 chance of one in a 5-card hand) keeps the engine accessible
• Six hand traps and six negation or removal cards give layered interaction
• High-ATK closers (Chaos Angel 3500, ZEUS 3000, TY-PHON 2900) and Bystial bosses give real closing power

Weaknesses

• Illegal list: Called by the Grave is Forbidden
• Three to four competing archetypes dilute the engine (16.1% exact-archetype purity)
• No side deck, so there is no post-side plan
• Main deck has 13 singletons, so starter and extender copies are not reliable

Critical choke points

• Forbidden Called by the Grave makes the list illegal until it is removed
• Bystial bosses depend on a 2-to-3 copy Bystial core that the list does not fully run
• Fiendsmith link and fusion sequencing depends on single-copy Extra Deck cards

Recommended changes

Evidence & confidence

• Verified: Main Deck 41 cards and Extra Deck 15 cards are inside master-duel size rules (main 40-60, extra 0-15); Called by the Grave is Forbidden in master-duel and is run 1 copy (illegal); Limited and Semi-Limited copy limits for Magnamhut, Maxx C, Crossout Designator and Droll & Lock Bird are met; Side deck contains 0 cards; Archetype purity is 16.1% exact-name (9 of 56 non-Extra cards)
• Inferred: Searcher accessibility of about 0.91 in a 5-card hand; Hand-trap availability of about 0.64 going second; Engine conflicts across Bystial, Fiendsmith, Primite and Mulcharmy; Toolbox structural profile score of 50 from dimension estimates
• Provisional: Matchup fit and meta standing (no dated metagame sample); Tournament reliability (no tournament link)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No archetype usage statistics: core and meta-standard comparison unavailable No tournament link: archetype meta-share and per-pilot record absent No win-rate or brick telemetry exists in YGOVN Meta Power is provisional without a dated metagame sample No side deck registered