Creeping Unease

Stringing together unearthly noises and sounds, a creature you can see must make a charisma saving throw at the beginning of their turn.  If they fail, they subtract 1 from their attacks rolls, ability checks, and skill checks until they succeed on the save.  If they succeed, they do not suffer any penalties for that turn.  If the target fails multiple times consecutively, the penalty to their rolls equals the times they have failed (to a maximum negative equal to your spellcasting modifier), resetting to zero upon success.

This spell can only be dispelled by a  remove curse cast on the target, and ends early if the target cannot hear you.

When you cast this spell using a spell slot of 2nd level or higher, you may target one additional creature for every slot level above 1st.  The additional targets must be within 30ft of each other.