Performapal Swincobra

[ Reptile / Pendulum / Effect ] [ Pendulum Effect ] Once per turn, when a monster you control inflicts battle damage to your opponent: You can send the top card of your opponent's Deck to the Graveyard. [ Monster Effect ] This card can attack your opponent directly. If this card attacks, it is changed to Defense Position at the end of the Battle Phase. ATK/ 300 DEF/ 1800