Vudo doll

You create a small puppet that looks like another creature you must have seen before. You can use an action to deal light (1d8), heavy (3d8) or deadly (10d8) damage to the puppet. If the target is on the same plane as you, he must make a Constitution saving throw or take full necrotic damage. If successful, he only receives half the damage and the doll loses two additional Stability levels. The vudo doll has 10 stability levels. Light damage costs one Stability lvl, coarse damage 3, killing damage 6 and the doll is destroyed. If the victim has survived a vudo doll he is immune to this spell for one week.

A Dispel Magic or Remove Curse spell ends the spell prematurely.

At higher levels. If you cast the spell at level 6 or higher, the doll gains a Stability level and the Killing Damage increases by 1d8 per level.