Curse Of The Waning Mind

You point at a target you can see within range and whisper an incomprehensible incantation, placing an eerie psychic curse on them. The target must make an Intelligence save. On a failure, the target is enchanted with a bewitching red aura for the next minute. While the target is cursed, they must make an Intelligence save after they suffer damage from a spell attack, taking an additional 1d6 psychic damage on a failed save.

At higher levels. When you cast the spell at a higher level, the additional damage increases by 1d6 for each slot above the first.