Synchron Deck #770263 — Yu-Gi-Oh! OCG
40 Main, 15 Extra, incl. Mikumari the Banisher Ashtra x3, Yoa the Plague Ashtra x3, Dominus Spiral x3. Created Oct 20, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/20/2026
Main Deck (40)
- Akasuna the Battle Ashtra x1
- Diabrocken the Ominous Specter x1
- Fabled Lurrie x1
- Fiendsmith Engraver x1
- Kuzuha the Hex Ashtra x1
- Lacrima the Crimson Tears x1
- Lady Labrynth of the Silver Castle x1
- Maxx "C" x1
- Mikumari the Banisher Ashtra x3
- Yoa the Plague Ashtra x3
- Ash Blossom & Joyous Spring x2
- Jet Synchron x1
- Mecha Phantom Beast O-Lion x1
- Revolution Synchron x1
- Ashtrashen - Gate to the Worlds Beyond x2
- Fiendsmith's Tract x1
- Triple Tactics Thrust x1
- Ashtra's Domain x1
- Ashtra's Howl x1
- Ashtra's Web x1
- Dominus Impulse x2
- Dominus Spiral x3
- Infinite Impermanence x3
- Mind Mirror Force x1
- Songs of the Dominators x3
- Synchro Emergency x2
Extra Deck (15)
- Fiendsmith's Lacrima x1
- A Bao A Qu, the Lightless Shadow x1
- Fiendsmith's Requiem x1
- Fiendsmith's Sequence x1
- Mecha Phantom Beast Auroradon x1
- Reprodocus x1
- Ashtraja Susanoo x1
- Ashtraya Mikumari-no-Mikoto x1
- Baronne de Fleur x1
- Buster Dragon x1
- Herald of the Arc Light x1
- Juraishin, the Cursed Thunder God x1
- Accel Synchron x1
- D/D/D Wave High King Caesar x1
- Number 42: Galaxy Tomahawk x1
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30± 5/ 100
Power Score
Structural
51
Reliability
40
Going First
48
Going Second
40
Deck — Deck Power Evaluation
Final Contextual Deck Power: 30/100 (±5 · Confidence: Medium)
| Overall score | Value |
|---|---|
| Structural Deck Power | 51 |
| Going First | 48 |
| Going Second | 40 |
| Meta Power | provisional |
| Tournament Reliability | 40 |
- Primary strategy: Combo
- Secondary strategies: Stun, Toolbox
- Format: ocg
Legality
Main 40 / Extra 15 / Side 0 — status under the rules at evaluation time: Illegal. 5 violation(s).
Identity & game plan
- Win condition: Synchro and Link summons from the Ashtra and Fiendsmith engines into a 3000-ATK board (Akasuna, Ashtraja Susanoo, Ashtraya Mikumari-no-Mikoto), with the Ashtra Traps adding negation and recursion.; Going-second hand traps (Ash Blossom, Maxx C, Infinite Impermanence) and Synchron extenders that trade for the opponent's first board, then convert through a Synchro boss.
- Turn 1 (going first): Open Ashtra or Fiendsmith starters on T1 (Yoa, Mikumari, Engraver, Tract), use Synchron tuner bodies to reach a Level 7 or 8 Synchro, and keep one hand trap up for the opponent's answer.
- Turn 2 (going second): Hold Ash Blossom, Maxx C and Infinite Impermanence to stop the opponent's first summon or search, then rebuild through the Ashtra Trap summon route into a Synchro boss.
- Recovery: Recur Ashtra monsters from the GY through Ashtrashen and Ashtraja Susanoo's End Phase effect, and reuse the Fiendsmith Engraver and Lacrima recursion loop.
- After siding: Not defined: the deck runs no side deck (side_count 0), so there is no post-side plan.
Why it scores here
The list is Illegal in OCG because five Forbidden cards are run (Galaxy Tomahawk, Reprodocus, Auroradon, Caesar, Fleur), so it receives a theoretical, structural-only score capped low. Structurally the deck reliably reaches a Synchro or Link summon through Ashtra and Synchron starters and tuners, and its 2-copy hand traps give it a solid going-second interaction layer. The main limitations are brick risk from 17 Trap Cards and a 40-card main with no archetype core (exact-name purity 1.8%, with Ashtra, generic and Fiendsmith spread across it), plus no side deck, so there is no post-side plan. The score comes from consistency, median output and interaction on the system, not from Synchron being a known archetype, and card scores were not averaged. Median and ceiling output are text-only inference because no combo boards exist.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 55 | P(>=1 searcher in opening 5) ~0.85; P(>=1 Ashtra starter, 3-copy Yoa or Mikumari) ~0.34; the Synchron tuner count is low (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 45 | 17 Trap Cards and roughly 6 Trap-based non-starters in a 40-card main; P(>=1 hand trap in 6) ~0.65 (Inferred) |
| D3 | Combo Conversion & Ceiling | 60 | Ashtra Traps and Ashtraja Susanoo offer a strong Synchro ceiling, but no recorded boards exist (Inferred semantic read) |
| D4 | Combo Floor & Median Output | 45 | The median is unknown: combos_evidence is empty, so the floor comes from text only (Inferred) |
| D5 | Interruption Resilience & Route Redundancy | 50 | Redundant Ashtra and Fiendsmith recursion and two hand traps give partial route redundancy; no interruption data (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 50 | Recursion from GY via Ashtra and Fiendsmith text, with no measured resource data (Inferred) |
| D7 | End-Board & Interaction Quality | 60 | Ash Blossom, Maxx C, Infinite Impermanence, Mind Mirror Force and Baronne-style negations form layered interaction (Verified text, Inferred quality) |
| D8 | Going-Second & Board-Breaking Power | 45 | Going-second hand traps are present, but board-breaking power is uncertain without boards (Inferred) |
| D9 | Offensive Pressure & Closing Power | 55 | Akasuna at 3000 ATK and Ashtraya Mikumari-no-Mikoto at 3000 ATK are real closers (Verified stat) |
| D10 | Main Deck Efficiency & Flexibility | 50 | Main deck is 40 cards with 26 distinct and 17 Trap Cards, with low archetype purity (Verified composition, Inferred efficiency) |
| D11 | Extra Deck Efficiency & Coverage | 55 | The Extra Deck is 15 cards with 5 Forbidden, leaving 10 legal Extra cards (Verified legality) |
| D12 | Side Deck Adaptability | 20 | No side deck is run (side_count 0), so there is no adaptability (Verified) |
| D13 | Matchup Coverage & Format Fit | 20 | No tournament link or dated meta sample exists (Provisional) |
| D14 | Pilotability & Error Tolerance | 45 | Multi-step Synchro and Ashtra sequencing with many trap timings is demanding to pilot (Inferred) |
How the score was computed
Strategy profile: Combo. Structural ≈ 51, Going First ≈ 48, Going Second ≈ 40, Meta = provisional, Tournament Reliability ≈ 40. Modifiers: banlist_exposure (-12). Final formula: Illegal cap applied: raw 0.80*Structural(51) + 0.20*TournamentReliability(40) + modifiers(-12) = ~37, capped to 30 for illegal list (theoretical/structural-only). Meta provisional.
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
- Layered hand-trap and negation suite (Ash Blossom, Maxx C, Infinite Impermanence, Mind Mirror Force)
- Synchro and Link extenders from Ashtra and Fiendsmith
- Strong 3000-ATK closers
Weaknesses
- Illegal list: five Forbidden cards
- 17 Trap Cards in the main deck raise brick risk
- Low archetype purity with no core
- No side deck
Critical choke points
- Single-card Ashtra and Fiendsmith starters at 1-3 copies
- Forbidden-card removal leaves Extra Deck slots unfilled
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | Number 42: Galaxy Tomahawk, Reprodocus, Mecha Phantom Beast Auroradon, D/D/D Wave High King Caesar, Baronne de Fleur | Legal Synchro or Link replacements matching the existing Ashtra/Synchron engine | The list is illegal in OCG; it cannot receive a normal score until the Forbidden cards are removed. |
| 2 | One or two non-engine Trap Cards | Extra starters or Synchro tuners | Reduces brick risk from the Trap-heavy main deck. |
| 3 | None | A 15-card side deck | Creates a post-side plan, which the deck currently lacks. |
Evidence & confidence
- Verified: Five Forbidden cards in the main or Extra Deck (legality); Main 40 / Extra 15 / Side 0 counts; Card text and stats for each listed card
- Inferred: Consistency estimates from hypergeometric draws; Brick risk from 17 Trap Cards; Engine coherence from archetype spread
- Provisional: Meta Power (no dated metagame sample); Matchup fit
- Data gaps: no combos supplied: combo floor, median and ceiling are text-only inference no tournament link: archetype meta-share and match record absent no win-rate telemetry for going-first, going-second, matchup, brick or OTK rates Meta Power is provisional unless a dated metagame sample is supplied
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