Devine Banishment

You attempt to send one fiend that you can see within range to the pits of the hells. The target must succeed on a Charisma saving throw or be banished.

On a failed save, fiends are evacuated from any host they are possessing, leaving it unharmed. In addition the fiend takes 2D8 radiant damage.  If the fiend is reduced to 0 hp as a result the fiend is destroyed otherwise it is sent to the hells

on a Successful save, the target is frightened of you for 1 minute. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you deal an extra d8 of radiant damage for each level above 2nd. Additionally you can target one additional creature within 5ft for each slot level above 4th.