Excommunicate

You target a creature you can see within 120 feet of you. As long as you maintain concentration on the spell, the creature takes 4d10 radiant damage at the end of each of your turns. If the spell ends and the creature was targeted for the full duration without you losing concentration, the creature is banished to its home plane and cannot return to the plane it was banished from for 1d10 × 100 years.

At Higher Levels: When you cast this spell using a spell slot of 7th level or higher, the radiant damage increases by 2d10 for each slot level above 6th.