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Gem-Knight Master DiamondLimited

Gem-Knight Master Diamond

Fusion Effect Monster

Card text

3 "Gem-Knight" monsters Must first be Fusion Summoned. Gains 100 ATK for each "Gem-" monster in your GY. Once per turn: You can banish 1 Level 7 or lower "Gem-Knight" Fusion Monster from your GY; until the End Phase, this card's name becomes that monster's original name, also replace this effect with that monster's original effects.

Attribute
EARTH
Type
Rock
Level
9
ATK
2900
DEF
2500

Archetype: Gem-

Explained

What it does

A Fusion of 3 "Gem-Knight" monsters that must first be Fusion Summoned. It gains 100 ATK for each "Gem-" monster in your GY. Once per turn, banish a Level 7 or lower Gem-Knight Fusion from your GY to take its name and original effects until the End Phase.

Play it when

In Gem-Knight decks, as its only copy. It's Limited in the TCG.

Common mistakes
  • Expecting the copied effects to stay if it leaves the field. They end.

Status: Limited in the TCG (Sept 21, 2026 list), so you can run 1 copy.

How it works

Materials: 3 “Gem-Knight” monsters. Must first be Fusion Summoned.

  • Continuous: Gains 100 ATK for each “Gem-” monster in your GY.
  • Ignition (once per turn): Banish 1 Level 7 or lower “Gem-Knight” Fusion Monster from your GY; until the End Phase, this card’s name becomes that monster’s original name, and this effect is replaced by that monster’s original effects.

Rulings in plain English

Summon condition: Not an effect. It can only come from the Extra Deck by Fusion Summon, unless an effect ignores Summoning conditions. Once properly summoned, it can be revived from the GY or face-up banishment.

Copy: Stops if it’s no longer face-up in the Monster Zone.

Gem-Knight Pearl, Gem-Knight Lady Rose Diamond, Brilliant Fusion.

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