D/D/D Super Doom King Purple Armageddon

Pendulum Effect :Once per turn, if your "D/D/D" Fusion Monster battles an opponent's monster, before damage calculation: You can make that opponent's monster lose 1000 ATK until the end of this turn (even if this card leaves the field).
Monster Effect : 2 "D/D/D" monsters
You can target 1 Attack Position monster your opponent controls; destroy it, and if you do, inflict damage to your opponent equal to half the destroyed monster's original ATK. You can only use this effect of "D/D/D Super Doom King Purplish Armageddon" once per turn. If an opponent's monster battles, before damage calculation: You can make the ATK of that opponent's monster become equal to its original ATK until the end of the Damage Step. If this card in the Monster Zone is destroyed: You can place this card in your Pendulum Zone.