Necrotic Shroud

You can use a bonus action to transform for 1
minute or until you end it as a bonus action. Creatures other than your allies within 10 ft. of
you that can see you must succeed on a DC 11 Charisma saving throw or become frightened of
you until the end of your next turn. Once on
each of your turns, you can deal 2 extra necrotic
damage to a target when you deal damage to it
with an attack or a spell. Once you transform
you can't use it again until you finish a long rest.