Vampiric Bubble

You create a 10ft radius sphere of pink/purple energy originating from yourself, travelling around corners and encompassing everything within its range. Each creature of choice within the sphere must make a Wisdom saving throw or 3d6 Necrotic damage, or half as much on a successful save. The caster then regains HP equal to half the total damage dealt.

At Higher Levels. When you cast this this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.