Bell of the Damned

Upon casting this spell, you choose up to 6 creatures you can see within 60 feet of you. A ghostly green bell forms in the air ringing only for the chosen targets, shaking their soul and body.

All chosen creatures must make a wisdom saving throw equal to your spell save DC, taking 5d6 damage on a failure and half as much on a successful save. Additionally, any creature that fails becomes frightened of the caster until the end of their next turn. 

When cast on undead creatures, they instead take radiant damage, and on a failed save become vulnerable to it until the end of their next turn, rather than being frightened.

For each spell slot level above second that you use to cast this spell, add 1d6 to the damage. For every 2 levels above second level used to cast this spell you can target 1 additional creature.