Sinful Spoils of Doom - Rciela

Target 1 Level 7 or higher Spellcaster monster you control; apply the following effects.
●While face-up, that monster is unaffected by other monsters' effects this turn, and is sent to the GY during the Standby Phase of the next turn.
●All monsters your opponent currently controls lose ATK equal to the targeted monster's ATK, then if their ATK becomes 0 by this effect, destroy them.
You can only activate 1 "Sinful Spoils of Doom - Rciela" per turn.