Void Tear

You use Void energy to rend a creature of your choice within range. The target must make a Constitution save or take 1d6 Necrotic damage and is afflicted with Voidtorn for 3 rounds. A target who succeeds the saving throw takes 1d6 Necrotic damage only.

Creatures that are Voidtorn take 1d4 Necrotic damage every time they take an Action, Bonus Action, Reaction; or move 10 feet.

At Higher Levels. This spell inflicts Voidtorn for 1 round longer for every spell slot level above 1st.