Bad Luck

You peer into the future of a creature within range and pull at their fate strings to subtly alter their luck.  They must make a wisdom saving throw. On a success, they are at disadvantage for their next attack or saving throw, the spell ends and they are immune to further castings for 24 hours. On a failure, they must roll a d4 and subtract that roll from their attacks, saving throws and damage rolls while the spell lasts.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, use a larger dice for each level - d6 at 4th level, d8 at 6th level, d10 at 8th, d12 at 9th.