Black Fang Magician

[ Pendulum Effect ] 
Once per turn: You can target 1 face-up monster your opponent controls; its ATK becomes half its current ATK (until the end of this turn), then destroy this card.

[ Monster Effect ] 
(This card is always treated as an "Xyz Dragon" card.)
If this card is destroyed by battle or card effect: You can target 1 DARK Spellcaster-Type monster in your Graveyard; Special Summon it.