Megalith Deck #773822 — Yu-Gi-Oh! Master Duel
50 Main, 15 Extra, incl. Mulcharmy Fuwalos x3, Megalith Aratron x3, Megalith Phul x3. Created Oct 25, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/25/2026
Main Deck (50)
- Fabled Lurrie x1
- Fiendsmith Engraver x2
- Lacrima the Crimson Tears x1
- Maxx "C" x1
- Mitsurugi no Mikoto, Aramasa x2
- Mitsurugi no Mikoto, Kusanagi x1
- Mitsurugi no Mikoto, Saji x1
- Mulcharmy Fuwalos x3
- Mulcharmy Purulia x2
- Ame no Habakiri no Mitsurugi x2
- Ame no Murakumo no Mitsurugi x2
- Futsu no Mitama no Mitsurugi x1
- Megalith Aratron x3
- Megalith Bethor x1
- Megalith Hagith x2
- Megalith Notrah Plura x1
- Megalith Phul x3
- Ash Blossom & Joyous Spring x3
- Fydraulis Harmonia x3
- Fiendsmith's Tract x1
- Megalith Anastasis x3
- Megalith Unformed x3
- Mitsurugi Mirror x1
- Mitsurugi Prayers x1
- Mitsurugi Ritual x1
- Pre-Preparation of Rites x3
- Triple Tactics Talent x1
- Mitsurugi Great Purification x1
Extra Deck (15)
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54± 6/ 100
Power Score
Structural
62
Reliability
50
Going First
68
Going Second
66
Deck — Deck Power Evaluation
Final Contextual Deck Power: 54/100 (±6 · Confidence: Low)
| Overall score | Value |
|---|---|
| Structural Deck Power | 62 |
| Going First | 68 |
| Going Second | 66 |
| Meta Power | provisional |
| Tournament Reliability | 50 |
- Primary strategy: Midrange
- Secondary strategies: Toolbox
- Format: master-duel
Legality
Main 50 / Extra 15 / Side 0 — status: Legal.
Identity & game plan
- Win condition: Ritual boss monsters (Ame no Murakumo no Mitsurugi 3200 ATK, Megalith Notrah Plura 3700 ATK) summoned through Megalith and Mitsurugi ritual lines, with Ame no Habakiri no Mitsurugi lowering opposing ATK by 800.; Extra Deck link, synchro and xyz pressure (King of the Feral Imps, Gallant Granite, Golden Cloud Beast - Malong) once a ritual board is established.
- Turn 1 (going first): Search Ritual Spells and Ritual Monsters with Pre-Preparation of Rites and Megalith Anastasis, then Ritual Summon a Megalith boss with Megalith Unformed or Mitsurugi Ritual, using Ash Blossom and Maxx C as interaction.
- Turn 2 (going second): Hold Ash Blossom and Maxx C to protect the turn-1 ritual line, then use Ame no Habakiri or Murakumo effects to answer the opponent's board, with Megalith Unformed ATK reduction as a second layer.
- Recovery: Rebuild from the graveyard with Mitsurugi Ritual and Megalith ritual recursion effects, and search the next ritual monster with the 24 searcher-text cards.
- After siding: No side deck is registered, so no post-side plan can be verified; any side plan is a gap to fill.
Why it scores here
The deck's consistency rests on its searchers: 24 searcher-text cards give about a 97% chance of at least one searcher in an opening five-card hand, so the engine is usually live by turn 2. Interaction is the strongest part of the system, with Ash Blossom, Maxx C, Herald of the Arc Light, Mitsurugi Great Purification and Murakumo's negation and removal text covering both turns. Closing power comes from the 3200 and 3700 ATK ritual bosses plus the ATK-reduction effects. The score is held down because the list runs three or four overlapping engines (Megalith, Mitsurugi, a Fiendsmith cluster and Mulcharmy), with only 24.6% exact archetype purity, and because there is no side deck and no recorded combo or tournament data. Archetype popularity earned no points, and no card scores were averaged into the deck score.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 70 | P(at least one searcher in opening 5) ≈ 0.97 across 24 searcher-text cards; ritual starters are 3-copy singles, so the live rate is good but not guaranteed (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 55 | Two ritual sub-engines and a Fiendsmith cluster compete for hand space, and tribute-cost ritual monsters raise the risk of dead hands (Inferred) |
| D3 | Combo Conversion & Ceiling | 65 | No parseable boards; ceiling read from text only: Murakumo on-summon destruction, Habakiri -800 ATK and Notrah Plura at 3700 ATK, with conversion unmeasured (Inferred) |
| D4 | Combo Floor & Median Output | 52 | No recorded boards, so median output is unmeasured; the Megalith core is consistent but often needs a second engine to convert (Inferred) |
| D5 | Interruption Resilience & Route Redundancy | 66 | Several independent starters (Pre-Preparation, Anastasis, Unformed, Mitsurugi Ritual and Mirror) plus Ash and Maxx C give recovery after one interruption (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 68 | Searcher density and draw effects (Mulcharmy Fuwalos and Purulia, Maxx C) rebuild the hand, and graveyard ritual recursion helps, though tribute costs are heavy (Inferred) |
| D7 | End-Board & Interaction Quality | 74 | 10 negation-text and 12 removal-text cards across Ash, Maxx C, Herald, Great Purification and the Mitsurugi monsters; only Herald and Maxx C are Limited (Inferred semantic) |
| D8 | Going-Second & Board-Breaking Power | 72 | Going-second boards are answered by Murakumo's destruction, Habakiri's -800 ATK and Unformed's -500 ATK, but these depend on ritual summons that can brick (Inferred) |
| D9 | Offensive Pressure & Closing Power | 70 | Two 3200-plus ATK ritual bosses and ATK reduction give closing power; no end-board data is recorded (Inferred) |
| D10 | Main Deck Efficiency & Flexibility | 48 | 50 main-deck cards with 28 distinct names and 24.6% exact archetype purity across four sub-archetypes; compactness is low (Verified structure, Inferred consequence) |
| D11 | Extra Deck Efficiency & Coverage | 55 | 15 Extra slots split across XYZ, Synchro and Link with one Fusion; three engine families compete for those slots (Verified structure, Inferred coverage) |
| D12 | Side Deck Adaptability | 25 | No side deck cards; no post-side plan exists in the evidence (Verified gap) |
| D13 | Matchup Coverage & Format Fit | 50 | No tournament link or dated meta sample; the Megalith core's usage is archetype-level only, so this is set neutral (Provisional) |
| D14 | Pilotability & Error Tolerance | 40 | Tribute-based ritual lines and cross-engine decisions add many decision points, so repeatable results need an experienced pilot (Inferred) |
How the score was computed
Strategy profile: Midrange profile only; Toolbox is noted as secondary but not blended. Structural ≈ 62, Going First ≈ 68, Going Second ≈ 66, Meta = provisional, Tournament Reliability ≈ 50. Modifiers: engine conflicts (-3); weak post-side plan (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (Meta provisional, no dated sample)
Probability & combo summary
- Opening a starter: P(≥1) ≈ 0.28 · 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
- 24 searcher-text cards give near-certain access to at least one searcher in the opening hand
- Layered interaction: Ash Blossom, Maxx C, Herald, Great Purification and Murakumo negation text
- Board-breaking and closing options: Murakumo on-summon destruction, Habakiri ATK reduction, Notrah Plura at 3700 ATK
Weaknesses
- Three or four overlapping engines (Megalith, Mitsurugi, Fiendsmith, Mulcharmy) with only 24.6% exact archetype purity
- No side deck, so no post-side adaptation
- No recorded combos, tournament data or win-rate telemetry
Critical choke points
- Ritual summons need a Ritual Monster in hand plus tributes; Mitsurugi lines depend on single-copy Mitsurugi Ritual and Mitsurugi Mirror
- Extra Deck is split across three families, so the wrong Extra card for the board is common
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | Fiendsmith Engraver x2, Lacrima the Crimson Tears x1, Fiendsmith's Tract x1 | Megalith or Mitsurugi ritual support (for example, a further Megalith searcher or a second ritual spell), if the list is kept as one engine | Removes the sub-engine that conflicts with the ritual core and raises purity and hand coherence |
| 2 | Fiendsmith's Requiem, Fiendsmith's Lacrima and Fiendsmith's Sequence from the Extra Deck | Extra Deck cards that support the Megalith or Mitsurugi ritual boards | Reduces Extra Deck dead slots when the Fiendsmith main-deck cards are gone |
| 3 | none | A side deck of 3 to 15 cards covering the most common opposing interaction | Gives a post-side plan that the evidence currently lacks |
Evidence & confidence
- Verified: Legal under the Master Duel size and banlist rules (50 main, 15 extra, 0 side); Exact archetype purity is 24.6% with 28 distinct names; Extra Deck split: 5 XYZ, 5 Synchro, 4 Link, 1 Fusion
- Inferred: Opening-hand searcher access and engine liveness from hypergeometric estimates; Interaction density from card-text read; Ceiling and median output from card text, since no boards are recorded
- Provisional: Meta Power (no dated metagame sample); Matchup and format fit (no tournament link)
- 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 for going-first, going-second, matchups or brick rates Meta Power is provisional without a dated metagame sample Side deck is empty, so no post-side plan can be evaluated
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