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You can send 1 "Gem-Knight" Normal Monster or 1 "Gem-Knight Fusion" from your Deck to the GY; Special Summon this card from your hand in Defense Position. When your opponent activates a card or effect, while you control a "Gem-Knight" Fusion Monster (Quick Effect): You can banish 3 "Gem-Knight" cards from your GY, including this card; negate that effect, then all "Gem-Knight" monsters you currently control gain 1000 ATK. You can only use each effect of "Gem-Knight Hollowcore" once per turn.
- Type
- Effect Monster
- Attribute
- DARK
- Monster type
- Fiend
- Level
- 7
- ATK
- 1,950
- DEF
- 2,450
- Archetype
- Gem-
- Ban list (TCG)
- Unlimited