Vampiric siphon

The touch of your shadow-wreathed hand can siphon life force from others to heal your wounds. Make a melee spell attack against a creature within your vicinity. On a hit, the target takes 3d6 necrotic damage, and you regain hit points equal to the amount of damage that the enemy took. When you are attacking an enemy after you attack them you are able to use this spell once every other turn to gain back life force.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher you heal an extra 1d6 health points.