Ogdoadic Origin (ANGU-EN011) [Ancient Guardians]

If a face-up Reptile monster(s) you control is destroyed by battle or an opponent's card effect: You can target 1 card your opponent controls; send it to the GY. If this card in the Field Zone is destroyed by your opponent's card effect: You can send cards from the top of your opponent's Deck to the GY, equal to the number of Reptile monsters with different names in your GY. You can only use each effect of "Ogdoadic Origin" once per turn.