Archfiend Deck #751034 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

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

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

Legality

Main 60 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: High-ATK Fusion/Xyz/Link boss (Dracotail Gulamel, Arthalion, Secreterion Dragon, Mysterion, Caesar Valius) reached through Dracotail, Vanquish Soul and K9 engines; Vanquish Soul Rocks and K9-66X Jacks as Xyz board-control payoffs
• Turn 1 (going first): Open on Lukias, Rahu or Ketu searches and a Fusion Summon, but the 3-copy starter density is only about 0.23 per opening hand, so the T1 plan is not reliable
• Turn 2 (going second): Use the 11 hand traps (Ash Blossom, Ghost Belle, Skull Meister, D.D. Crow, Maxx C) to answer the opponent's first board, then rebuild through the searcher-text group (25 cards, about 0.94 at least one in hand)
• Recovery: Recover through Dracotail Flame, Horn and Sting recursion, and Dracotail monsters returning from the GY
• After siding: Not applicable: Master Duel has no side deck and the deck runs 0 side cards

Why it scores here

The deck is scored as a system, not as an average of its cards, and it is capped because it is illegal: Ketu Dracotail and Dracotail Mululu are each run three times against a two-copy limit. Its engine is three overlapping sub-archetypes (Dracotail 22 copies, Vanquish Soul 20, K9 6, plus generic and Regenesis), which gives a purity of only 6.7% and real engine conflicts. Consistency is moderate: each 3-copy starter is about 0.23 likely in a 5-card opening hand, while the searcher-text group is about 0.94 likely, so the deck usually finds a search but rarely a complete line. Interaction is the strongest part of the list, with 11 hand traps and 11 negation-text cards that suit going second. Recorded combo evidence is thin (4 boards, best power index 6, median 5, zero board or interaction density), so the combo floor and ceiling scores are low and carry wide uncertainty. Popularity was not credited, and the deck has no tournament link, so meta power is null and matchup fit is provisional.

Dimension scores

How the score was computed

Strategy profile: Midrange primary, Toolbox secondary, disclosed as a single primary profile for scoring. Structural ≈ 49, Going First ≈ 48, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: Illegal copy-limit violation (cap applied) (0); Engine conflicts (-6); Banlist exposure (-4). Final formula: Illegal cap: 0.80*Structural(49) + 0.20*TournamentReliability(45) = 48.2, plus modifiers -10 gives 38.2; capped at 30 as a theoretical/structural-only score because the deck is illegal (Meta provisional)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.23 · key two-card combo ≈ — · full-brick estimate ≈ — (all Inferred)
• Combo output: best PowerIndex 6, median 5, board-per-starter 0
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Deep interaction suite: 11 hand traps and 11 negation-text cards
• High-ATK boss ceiling (3000-ATK Fusion/Xyz/Link extras)
• Searcher density (25 searcher-text cards) gives frequent access to a starter
• Recursion through Dracotail Flame, Horn and Sting

Weaknesses

• Illegal: two cards over the copy limit
• Three overlapping sub-archetypes with low purity (6.7%)
• Low combo floor and median (median power index 5)
• Heavy brick and dead-draw risk from 11 hand traps and 11 tech cards
• Thin evidence base: 4 recorded boards

Critical choke points

• Starter access depends on 3-copy cards with about 0.23 per opening hand
• Hand traps need a specific card in hand to answer the opponent's first board
• Engine routing between Dracotail and Vanquish Soul can conflict

Recommended changes

Evidence & confidence

• Verified: Legality: 60 Main, 15 Extra, 0 Side; Ketu Dracotail and Dracotail Mululu are over the copy limit; Banlist statuses for Limited and Semi-Limited cards; Card stats and text for listed boss monsters; Archetype purity 6.7% and sub-archetype spread
• Observed: 4 recorded combo boards: best power index 6, median 5; Average end hand 1, GY 0, banished 0 from recorded boards
• Inferred: Starter consistency from hypergeometric estimates (0.2333 and 0.9406); Hand-trap and interaction value from card text (interaction density is 0 in recorded boards); Going-first and going-second splits
• Provisional: Meta power (null); Matchup fit and format fit (no dated sample or tournament link); Side deck adaptability (Master Duel has no side deck)
• Data gaps: No tournament link: archetype meta-share and per-pilot match record absent No win-rate telemetry: going-first, going-second, matchup and brick rates are Inferred or Unknown Meta Power is provisional without a dated metagame sample Only 4 recorded combos, all unknown gameplay, with zero board or interaction density Usage statistics cover only 2 archetype core cards