Draining Grasp

The pores within your hand expand and convulse, releasing small wisps of black miasma from every hole in your dead flesh. The creature must succeed on a Constitution saving throw or take 1d8 necrotic damage, and you regain hit points equal to half the amount of necrotic damage dealt. 

If a humanoid is reduced to 0 hit points as a result of this spell, instead of dying immediately, they must make death saving throws.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).