Banishment to the Nine Hells

You attempt to send one creature that you can see within range to Avernus of the Nine Hells. The target must succeed on a Charisma saving throw or be banished. If the target succeeds on the saving throw the target can’t be banished by this caster for 1 hour. On a failure the target is banished to Avernus and suffers 2d10 force damage from the forced banishment to the Nine Hells. The target must then find it’s own way back to the Material Plane. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, you can target one additional creature for each slot level above 5th.