Gem-Knight Sardonyx

[ Pyro / Effect / Gemini ] This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it become an Effect Monster with this effect. ● When this card destroys an opponent's monster by battle and sends it to the Graveyard: You can add 1 "Gem-Knight" card from your Deck to your hand. ATK/ 1800 DEF/ 900