Crimson Siphon

The touch of your shadow-wreathed hand can siphon life force from others to heal your wounds. Make a melee spell attack against one creature within reach. On a hit, the target takes 1d6 Necrotic damage, and you regain Hit Points equal to half the amount of Necrotic damage dealt. 

- Damage increases by 1d6 per level, capping at 3d6 at level 3.