Megalith Deck #717550 — Yu-Gi-Oh! OCG

Deck — Deck Power Evaluation

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

• Primary strategy: Combo
• Secondary strategies: Toolbox
• Format: ocg

Legality

Main 42 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 2 violation(s).

Identity & game plan

• Win condition: Ritual Summon large Megalith Ritual Monsters (Notrah Plura 3700 ATK, Phaleg, Chalislime) and convert them into board pressure through Megalith searchers and Link enablers.; Impcantation Ritual recursion and Link-based piercing via ASHLAN U1000 pointing at Ritual Monsters (ASHLAN is listed in the Extra Deck but absent from usage statistics in this deck).
• Turn 1 (going first): Open with a Megalith searcher (Anastasis, Ophiel, Phul or Hagith) to fetch a ritual monster, then Ritual Summon via Megalith Unformed or Inception and extend through the Extra Deck Links.
• Turn 2 (going second): Use Notrah Plura or Aratron negation text to protect a Ritual Summon, then rebuild the board from the graveyard through Phuloch and Bethor recursion.
• Recovery: Ritual Monsters in the graveyard are re-added to hand by Phuloch, Ophiel, Phul and Penciplume, so a single Megalith card can rebuild a lost board.
• After siding: No side deck is registered in the export, so no post-side plan can be evaluated; the Side Zone is empty in a best-of-3 context.

Why it scores here

The deck is a ritual engine: 15 Megalith core copies plus 24 searcher-text cards give a high chance (archetype core group about 0.905 in a 5-card opening, Inferred) of finding at least one Megalith card, though a specific starter such as Megalith Anastasis appears only about 32% of the time in hand. Consistency and resilience come from redundant searchers and two negation-text monsters (Aratron, Notrah Plura), while combo ceiling and median output are scored from text alone because no recorded boards exist. Going-first and going-second are scored from the same system, and the score does not come from averaging card power or from the popularity of the archetype. The Illegal status is the dominant factor: Cross-Sheep is Forbidden in OCG and runs three copies, and Pot of Extravagance exceeds its Semi-Limited limit, so the deck is capped and labelled structural-only.

Dimension scores

How the score was computed

Strategy profile: Combo primary 100% (Toolbox secondary noted only, not blended). Structural ≈ 53, Going First ≈ 55, Going Second ≈ 52, Meta = provisional, Tournament Reliability ≈ 48. Modifiers: Banlist exposure (-8); No side deck (-4); Illegal cap (-10). Final formula: Illegal cap: normal 0.80*Structural + 0.20*TournamentReliability = ~40 after modifiers, capped to 30 (structural-only, theoretical); Meta provisional

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.91 · key two-card combo ≈ — · full-brick estimate ≈ 0.1 (all Inferred)
• Combo output: best PowerIndex —, median —, board-per-starter —
• Turn order: 0 going-first lines vs 0 going-second lines

Strengths

• Dense Megalith core (15) with redundant searchers, so the engine is usually reachable
• Negation-text monsters (Aratron, Notrah Plura) and recursion give resilience across turns
• High-ATK ritual finishers (Notrah Plura 3700) provide closing power

Weaknesses

• Illegal list: Cross-Sheep Forbidden (3 copies) and Pot of Extravagance over its Semi-Limited limit
• No side deck registered, so no post-side plan or matchup adjustment
• Extra Deck dead slot (Cross-Sheep) and low Extra coverage (6 distinct)
• Only 42% of copies are exact Megalith name; 20 generic and 3 Greed cards dilute the engine

Critical choke points

• Ritual Summon resource: Megalith Unformed and Inception are the only Ritual Spells in the main deck (2 copies total), so the ritual chain depends on few enablers
• Single Megalith starter probability (Anastasis about 32% in hand) on the going-first turn

Recommended changes

Evidence & confidence

• Verified: Main deck 42 and Extra Deck 15 are within OCG size rules (40-60, 0-15); Cross-Sheep is Forbidden with 3 copies run (legal 0); Pot of Extravagance is Semi-Limited with 3 copies run (legal 2); Copy histogram and type/attribute/race spreads from the export; Archetype purity: 24 exact Megalith, 33 off-archetype copies
• Inferred: P(>=1 Megalith core card in 5) about 0.905; key-starter draw odds; Brick and dead-hand estimate about 0.095 from the core group; Consistency and resilience scores from text roles and redundancy; Going-first and going-second estimates
• Provisional: Meta power (no dated metagame sample); Matchup and format fit (no tournament context)
• Data gaps: No combos supplied: combo floor, median and ceiling are text-only inference No tournament link: archetype meta-share and per-pilot record absent No win-rate telemetry for going-first/second, matchups, or brick/starter/OTK rates Meta power is Provisional without a dated metagame sample Data inconsistency: ASHLAN U1000 appears in the Extra Deck cards list (2 copies) but usage statistics marks in this deck=false No side deck registered (0 cards), so post-side scoring is absent