Purple Poison Magician

[ Pendulum Effect ] Once per turn, if your DARK Spellcaster-Type monster battles, before damage calculation: You can activate this effect; that monster gains 1200 ATK (until the end of the Damage Step), then destroy this card. [ Monster Effect ] (This card is always treated as a "Fusion Dragon" card.) If this card is destroyed by battle or card effect: You can target 1 face-up card on the field; destroy it.