When this card is destroyed by battle with an opponent's monster You can take control of that opponent's monster, and if you do, that monster becomes Zombie-Type, and its ATK/DEF each becomes 0. When a Zombie monster you control is destroyed by battle with an opponent's monster and this card is in your GY: You can banish this card; take control of that opponent's monster, and if you do, that monster becomes Zombie-Type, and its ATK/DEF each becomes 0. You can only use this effect of "Devouring Sarcoughagus" once per turn.