You can activate 1 card with this card’s name per turn.
(1) Target 1 Level 7 or higher Spellcaster you control; apply these effects, in sequence.
● That face-up monster is unaffected by other monsters’ effects this turn, but send it to the GY during the Standby Phase of the next turn.
● All face-up monsters your opponent currently controls lose ATK equal to that monster’s ATK, then, if any of those monsters’ ATK has been reduced to 0 as a result, destroy it.