Death Coil

A coil of negative energy projects out from your hand in the guise of a terrifying skull, seeking out your target unerringly. The living target must make a Constitution saving throw or take 4d8 shadow damage, or half as much damage on a successful one. You regain hit points equal to half the amount of shadow damage dealt.

This spell may be used to heal undead creatures. When used in this way, the undead creature recovers 6d8 hit points instead. You do not heal any hit points when used in this way.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd. If used to heal an undead creature, the healing increases by 2d8 for each slot level above 3rd.