Megalith Deck #773533 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 51/100 (±7 · Confidence: Medium)

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

Legality

Main 50 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Ritual Summon large Megalith and Mitsurugi ritual monsters (Notrah Plura 3700 ATK, Ame no Murakumo 3200 ATK) and push damage through an empty or weakened board; Extra Deck boss monsters (King of the Feral Imps, Gallant Granite, Golden Cloud Beast - Malong, Fiendsmith's Lacrima) after Ritual or Fusion setup
• Turn 1 (going first): Search with Pre-Preparation of Rites or Megalith Anastasis, Ritual Summon a Megalith monster via Megalith Unformed or a Ritual Monster, then use Aratron or Notrah Plura effects to protect the board
• Turn 2 (going second): Hold Ash Blossom and Maxx C for the opponent's first summon or effect, then Ritual Summon a Mitsurugi or Megalith boss that negates or destroys the opposing board
• Recovery: Recover via Megalith Phul, Megalith Hagith and Megalith Bethor recursion from the GY, and Mitsurugi searchers (Aramasa, Saji, Kusanagi) to rebuild a second Ritual Monster
• After siding: Not applicable: Master Duel is a single game with no sideboard, so the deck cannot adapt between games

Why it scores here

The deck is scored as a system: a Megalith ritual core (Unformed, Aratron, Phul, Hagith, Bethor, Notrah Plura) that searches with Pre-Preparation and Anastasis, backed by a second Mitsurugi ritual engine that is only partly compatible with it, plus Fiendsmith and Mulcharmy support. It reliably opens a plan through 24 searcher-text cards (P of at least one searcher in an opening 5 is about 0.97, Inferred), and it has real interaction density from Ash Blossom x3, Maxx C, Aratron, Notrah Plura and Ame no Murakumo (10 negation and 12 removal text hits). Its score is held back by the ritual conflict, a 24.6 percent exact archetype purity, 14 singletons that dilute consistency, and a 15-card Extra Deck with several boss cards that do not clearly connect to the main engine. Popularity and archetype usage stats confirm the list is real and accessible but earned no points on their own, and card scores were not averaged into the deck score. No recorded boards, guides or tournament data exist, so median output and meta fit are inferred or provisional.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 57, Going First ≈ 55, Going Second ≈ 58, Meta = provisional, Tournament Reliability ≈ 48. Modifiers: Engine conflict between Megalith and Mitsurugi rituals (-3); Banlist exposure (-1). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional): 0.80*57 + 0.20*48 = 55.2, then -4 modifiers = 51

Probability & combo summary

• Opening a starter: P(≥1) ≈ — · 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

• Ritual engine with 24 searcher-text cards gives high starter access
• Four hand traps and multiple negate effects cover the first summon or effect
• Boss monsters at 3200 to 3700 ATK close games and remove boards
• Megalith and Mitsurugi core is widely used, so the list is accessible

Weaknesses

• Two ritual engines conflict over the same slots and materials
• Exact archetype purity is only 24.6 percent
• 14 singletons and 49 off-archetype main cards raise brick and dead-hand risk
• Extra Deck of 15 spreads across unrelated bosses with no single clear line
• No sideboard, so no post-side adaptation

Critical choke points

• Ritual Monster in hand plus valid tribute material is required for most lines; missing either leaves a dead hand
• Single Megalith Unformed or Pre-Prep chain is the main route to the boss monsters
• Ash Blossom and Maxx C are the main answers to an early opposing effect

Recommended changes

Evidence & confidence

• Verified: Legal in Master Duel, size 50 main and 15 extra within 40-60 and 0-15; Restricted copy counts within legal limits for Herald, Maxx C, Mitsurugi Prayers and Ame no Habakiri; Archetype purity 16 of 65 exact-name copies and sub-archetype spread from the evidence; Race of Megalith ritual monsters is Rock and Mitsurugi ritual monsters are Reptile, from card data
• Observed: Usage statistics confirm the Megalith and Mitsurugi core as archetype-standard
• Inferred: Starter access, brick rate and interaction density are estimated from hypergeometric odds and card text; Ritual conflict and Extra Deck coherence judgements; Offensive closing and going-second reach from text
• Provisional: Meta power and matchup fit: no dated metagame sample or tournament link; Side deck adaptability: format has no sideboard
• 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 in YGOVN: going-first and going-second splits, brick rate, and matchup results are Inferred or Unknown No guides attached for the archetype Meta Power is Provisional unless a dated metagame sample is supplied