Deprive Vitality

A swarm of black and purple tendrils leap from your hand and grip onto the target. The target makes a constitution saving though DC 13 + the casters' wisdom modifier. On a failure, the target takes 3d6 necrotic damage, and temporarily looses hit points equal to half the amount of necrotic damage dealt. On a success, the target takes half 3d6 necrotic damage. The target regains the lost HP after a short or long rest.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 2nd.