Phantasmal Killer

Duration: 1 minute, Concentration
You tap into the nightmares of a creature and
create an illusory manifestation of its deepest
fears, visible only to that creature. The target
makes a Wis save. On a failure, the target
becomes frightened for the duration. At the end of
each of the target's turns, the target must
succeed on a Wis save or take 4d10 psychic
damage. On a success, the spell ends.
At Higher Levels. Each extra spell slots increases
the damage by 1d10.