Agony Warp

Curse a creature of your choice that you can see. They make a Wisdom saving throw. On a failed save, they must roll a d4 and subtract the number rolled from their AC, and from all attacks until the spell ends. If the creature dies before the spell ends, you can Bonus Action transfer Agony Warp onto another creature you can see.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st.