Gem-Knights Deck #774214 — Yu-Gi-Oh! Master Duel
40 Main, 15 Extra, incl. Gem-Armadillo x3, Gem-Knight Alexandrite x3, Gem-Turtle x3. Created Oct 25, 2026 by YGO Mod.
Created by: YGO Mod (20517634)
Created On: 10/25/2026
Main Deck (40)
- Gem-Armadillo x3
- Gem-Knight Alexandrite x3
- Prufinesse, the Tactical Trapper x2
- Santa Claws x2
- Gem-Turtle x3
- Gem-Knight Garnet x3
- Gem-Knight Sapphire x1
- Gem-Knight Tourmaline x1
- Gem-Knight Fusion x2
- Mystical Space Typhoon x3
- Overexaggeration x2
- Swords of Revealing Light x3
- Unexpected Dai x3
- Call of the Haunted x3
- Compulsory Evacuation Device x3
- D.D. Post x1
- Jelly Cannon x2
Extra Deck (15)
- Gem-Knight Amethyst x1
- Gem-Knight Ruby x3
- Gem-Knight Topaz x1
- Codebreaker Virus Swordsman x1
- Gaia Saber, the Lightning Shadow x1
- Imduk the World Chalice Dragon x1
- Ningirsu the World Chalice Warrior x1
- Sorcerer of Sebek x1
- Cairngorgon, Antiluminescent Knight x1
- Evigishki Merrowgeist x1
- Kachi Kochi Dragon x1
- Number 52: Diamond Crab King x1
- Number 80: Rhapsody in Berserk x1
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Deck — Deck Power Evaluation
Final Contextual Deck Power: 44/100 (±8 · Confidence: Medium)
| Overall score | Value |
|---|---|
| Structural Deck Power | 52 |
| Going First | 55 |
| Going Second | 45 |
| Meta Power | provisional |
| Tournament Reliability | 45 |
- Primary strategy: Combo
- Secondary strategies: Midrange, Toolbox
- Format: master-duel
Legality
Main 40 / Extra 15 / Side 0 — status: Legal.
Identity & game plan
- Win condition: Fusion-summon Gem-Knight Ruby (2500 ATK) or Gem-Knight Topaz (double attack) off Garnet/Alexandrite/Tourmaline fodder, then convert through repeated attacks and Gem-Knight Fusion recursion.; Overexaggeration and Santa Claws as one-card interaction, with Number 52 / Kachi Kochi as off-archetype Xyz pressure.
- Turn 1 (going first): Normal Summon Gem-Armadillo or Gem-Turtle to search a Gem-Knight, bring out Alexandrite or Garnet, then fuse via Gem-Knight Fusion for Ruby or Topaz.
- Turn 2 (going second): Use MST, Swords of Revealing Light, Call of the Haunted or Jelly Cannon on the opponent's first board, then rebuild through a Gem-Knight starter.
- Recovery: Gem-Knight Fusion returns from the GY by banishing a Gem-Knight, and Gem-Turtle or Gem-Armadillo search a new starter when the first line is answered.
- After siding: No side deck exists, so no post-side plan can be evaluated; this is a scored gap, not a neutral result.
Why it scores here
The deck is scored as a system: five 3-copy starters (Gem-Armadillo, Gem-Turtle, Alexandrite, Garnet, Unexpected Dai) give a high chance of at least one live starter in the opening hand, computed at about 0.92 (Inferred), but the actual Ruby/Topaz conversion depends on a 2-copy Gem-Knight Fusion and a single Tourmaline or Aqua fodder piece. Interaction is respectable (MST, SoRL, Call, CED, Jelly Cannon, Overexaggeration) but there are no hand traps, which weakens going-second play. The Extra Deck carries about ten off-archetype one-of cards with no dedicated support, which dilutes the engine and lowers Extra-Deck efficiency. No combo boards, tournament link, or win-rate data exist, so the ceiling and floor are text-only Inferred reads, and popularity or archetype share earned no points. Final is 0.80 × Structural + 0.20 × Tournament Reliability, with Meta Power left provisional, then modifiers for the empty side deck, dead off-archetype Extra weight, and the absence of hand traps.
Dimension scores
| # | Dimension | Score | Evidence |
|---|---|---|---|
| D1 | Engine Accessibility & Consistency | 55 | P(≥1 of 15 starters in 5-card hand) ≈ 0.92 from 3-copy starters; Gem-Knight Fusion P(≥1 in 5) 0.24 is the real bottleneck (Inferred) |
| D2 | Opening-Hand Quality & Brick Management | 50 | Copy histogram is healthy (nine 3-copy cards), but nine non-engine spells and traps plus ten off-archetype Extra cards make some hands redundant or dead (Inferred) |
| D3 | Combo Conversion & Ceiling | 55 | Ruby 2500 ATK and Topaz double attack are real payoffs, but no recorded boards exist, so the ceiling is text-only (Inferred) |
| D4 | Combo Floor & Median Output | 45 | No combo data; median output from text is lower because Ruby/Topaz need fodder and Fusion Spell access (Inferred) |
| D5 | Interruption Resilience & Route Redundancy | 55 | Five starters and two searchers give redundant access, but no recorded interruption data (Inferred) |
| D6 | Resource Economy, Recovery & Grind | 60 | Gem-Knight Fusion recursion and Gem-Turtle/Armadillo searches recover resources (Inferred) |
| D7 | End-Board & Interaction Quality | 60 | Sixteen removal-text cards and seven interaction spells/traps; no hand traps or negates (Verified text, Inferred quality) |
| D8 | Going-Second & Board-Breaking Power | 45 | No hand traps and only two going-second answers (Jelly Cannon, Overexaggeration) plus field-trap removal; going-second split not measured (Inferred) |
| D9 | Offensive Pressure & Closing Power | 60 | Ruby 2500 ATK and Topaz attack-twice give closing power; Number 80 and Diamond Crab are off-archetype (Inferred) |
| D10 | Main Deck Efficiency & Flexibility | 55 | 40 main cards with 17 distinct; compact but built with several off-engine tech cards (Verified composition, Inferred coherence) |
| D11 | Extra Deck Efficiency & Coverage | 35 | Only Ruby, Topaz and Amethyst are on-archetype; about ten Extra cards are one-of off-archetype with no support (Verified composition) |
| D12 | Side Deck Adaptability | 15 | No side deck at all in a best-of-3 format; no post-side plan (Verified) |
| D13 | Matchup Coverage & Format Fit | 45 | No dated meta or tournament link; archetype share absent (Provisional) |
| D14 | Pilotability & Error Tolerance | 40 | Multi-step fusion chains plus off-archetype routes raise decision load (Inferred) |
How the score was computed
Strategy profile: Combo. Structural ≈ 52, Going First ≈ 55, Going Second ≈ 45, Meta = provisional, Tournament Reliability ≈ 45. Modifiers: No side deck (-3); Dead off-archetype Extra weight (-2); No hand traps going second (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability (Meta provisional) + ContextModifiers (-7)
Probability & combo summary
- Opening a starter: P(≥1) ≈ 0.92 · 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
- Five 3-copy starters give high starter access
- Fusion payoffs Ruby and Topaz have strong stats
- Interaction breadth across spells and traps
- Searchers provide redundancy
Weaknesses
- No side deck
- No hand traps
- Ten off-archetype Extra cards dilute the engine
- Gem-Knight Fusion only 2 copies
Critical choke points
- Gem-Knight Fusion (2 copies) for Ruby/Topaz access
- Tourmaline/Aqua fodder for Topaz and Amethyst
Recommended changes
| Priority | Remove | Add | Reason |
|---|---|---|---|
| 1 | One off-archetype Extra Deck card (e.g. Codebreaker Virus Swordsman) | A third Gem-Knight Fusion or an on-archetype Fusion payoff | Raises the reliability of the one fusion route that carries the deck |
| 2 | One non-engine main-deck spell | A hand trap or a going-second interaction card | The deck has zero hand traps and weak going-second answers |
| 3 | A 3-card side deck | Enables post-side adaptation in best-of-3 play |
Evidence & confidence
- Verified: Legal 40/15/0 Master Duel composition; Zero hand-trap and zero floodgate cards; All 55 cards show banlist Unlimited
- Inferred: Starter access ≈ 0.92 in 5-card hand (hypergeometric); Gem-Knight Fusion bottleneck ≈ 0.24 in hand; Interaction quality and going-second weakness from card text
- Provisional: Meta Power and D13 matchup/format fit (no dated meta sample)
- Data gaps: no combos supplied — combo floor/median/ceiling is text-only inference no tournament link — archetype meta-share and per-pilot match record absent no win-rate telemetry — going-first/second, matchup and brick rates are Inferred or Unknown Meta Power is Provisional unless a dated metagame sample is supplied
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