Ultimate Banishment

Level: 7th-level Abjuration

Casting Time: 1 action

Range: 30 feet

Components: V, S, M (a relic imbued with divine energy worth 1,000 gp)

Duration: Instantaneous

Description: You attempt to permanently banish a creature to its native plane. The target must make a Charisma saving throw (DC = 8 + your proficiency bonus + your Wisdom modifier). On a failed save, the creature is banished for 1 year and cannot return without extraordinary means. On a successful save, the creature takes 8d10 radiant damage and remains.