Card Rulings:Number C65: King Overfiend

OCG Rulings

 * The effect that reduces the ATK and DEF of a monster by 1000 targets 1 face-up monster the opponent controls.


 * Detaching 1 Xyz Material from this card is a cost to activate the effect that reduces the ATK and DEF of a monster by 1000.


 * The ATK and DEF of a monster remain reduced as long as it remains face-up on the field.