Gem-Knights Deck #770311 — Yu-Gi-Oh! Master Duel

Deck — Deck Power Evaluation

Final Contextual Deck Power: 60/100 (±7 · Confidence: Medium)

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

Legality

Main 40 / Extra 15 / Side 0 — status: Legal.

Identity & game plan

• Win condition: Fusion Summon Gem-Knight Fusion Monsters (Lady Brilliant Diamond, Master Diamond, Master Diamond Dispersion, Lady Rose Diamond, Amethyst, Prismaura, Seraphinite) and attack through a field built from Gem-Knight Nepyrim, Quartz and Brilliant Fusion/Gem-Knight Dispersion; Gem-Knight Dispersion and Master Diamond Dispersion special summoning from the Extra Deck and Graveyard, with Gem-Knight Hollowcore and Phantom Quartz as Graveyard and Link extenders
• Turn 1 (going first): Nepyrim or Quartz opens, searches a Gem-Knight, and Brilliant Fusion or Dispersion fuses into a Fusion Monster; Ash Blossom or Infinite Impermanence stays up as protection
• Turn 2 (going second): Hold Ash Blossom, Infinite Impermanence, Ghost Ogre, Ghost Mourner or Maxx C for the opponent's first summon or spell, then rebuild through Gem-Knight Fusion and Dispersion
• Recovery: Gem-Knight Fusion recovers from the Graveyard by banishing a Gem-Knight, Hollowcore recurs Normal monsters, and Mulcharmy draws when the field is empty; Forbidden Droplet is a reset tool when the field is full
• After siding: Not applicable: Master Duel has no side deck, so adaptation is limited to the Extra Deck and in-game choices

Why it scores here

The list reliably opens a Gem-Knight starter: 14 of 40 main cards (Brilliant Fusion, Dispersion, Scatter Fusion, Gem-Knight Fusion, Quartz, Nepyrim) give about 90 percent odds of at least one in a 5-card opening hand (Inferred, hypergeometric). Interaction is the strongest part of the system, with 9 to 11 hand-trap-like cards giving about 74 percent (going first) to about 88 percent (going second) odds of one in hand, plus Forbidden Droplet and Ghost Ogre for board control. The Extra Deck is the weak point: Lady Lapis Lazuli, Aquamarine, Topaz and Ruby each name a Gem-Knight material (Lapis, Sapphire, Tourmaline, Garnet) that is not in the list, and Prismaura needs a Thunder monster the main deck does not run, so about a quarter of the Extra slots are unlikely to be usable as built. There are no recorded boards, so the ceiling and median are text-based inference, and the score comes from consistency, interaction breadth and recovery across the system rather than from the popularity of Gem-Knights or from averaging card scores.

Dimension scores

How the score was computed

Strategy profile: Midrange. Structural ≈ 62.7, Going First ≈ 64, Going Second ≈ 68, Meta = provisional, Tournament Reliability ≈ 58. Modifiers: engine conflict: Mulcharmy empty-field condition vs Gem-Knight board (-2). Final formula: 0.80*Structural + 0.20*TournamentReliability + ContextModifiers (no dated meta: Meta provisional; D13 dropped and weights renormalised over 95)

Probability & combo summary

• Opening a starter: P(≥1) ≈ 0.9 · 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

• Compact main deck with 17 distinct names and redundant copies of starters and hand traps
• Broad layered interaction: about 13 negation-text cards plus Droplet and Ghost Ogre
• Multiple recovery routes through Gem-Knight Fusion, Hollowcore and Mulcharmy
• Large Fusion finishers (3400 and 3000 ATK) reachable from common starters

Weaknesses

• Four Extra Deck cards need name-specific materials that the list does not run (Lapis, Sapphire, Tourmaline, Garnet)
• Prismaura's Thunder material is not in the main deck
• Mulcharmy and Pot of Sloth are low-impact slots that can brick
• No recorded combo evidence; the line depends on fusion sequencing that the guide calls cumbersome
• No side deck: no post-side adaptation

Critical choke points

• Gem-Knight Fusion and Brilliant Fusion/Dispersion access: most Fusion lines need at least one of these
• Extra Deck fusion requirements that depend on Gem-Knight Nepyrim being in hand or GY

Recommended changes

Evidence & confidence

• Verified: Legal in master-duel: 40 Main, 15 Extra, 0 Side; Maxx C Limited at 1 copy; Card text for all listed cards, including Fusion material names; Archetype composition and role-hint counts
• Inferred: P(at least one starter in 5) ≈ 0.90 and hand-trap odds 0.74/0.88; Four Extra Deck cards are unusable as built because their named materials are absent; Midrange primary with Combo secondary from text and fusion structure
• Provisional: Meta Power (null) and matchup fit D13 (dropped from structural weights)
• Data gaps: no combos supplied: ceiling, median and floor are text-only inference no tournament link: archetype meta-share and per-pilot match record absent no win-rate telemetry for Master Duel brick, starter or matchup rates Meta Power is Provisional unless a dated metagame sample is supplied usage_statistics in_this_deck flags appear to check only the Main Deck: Extra Deck cards that are in the list (Phantom Quartz, Master Diamond Dispersion, Seraphinite, Aquamarine, Lady Brilliant Diamond, Amethyst) are flagged false, so the core_present_pct of 40 is understated Ghost Mourner (2 copies) is not flagged is_hand_trap despite negate-on-summon text; counted as a hand trap by text here