Aurrik-Kai's Withering Grasp

As a reaction, the touch of your conjured, shadow-wreathed, spectral hand can siphon life force from others to heal your wounds at range. Make a ranged spell attack against a creature within range who has just attacked you or an ally. On a hit, the target takes 4d8 + your spell casting ability modifier necrotic damage, and you regain hit points equal to half the amount of necrotic damage dealt.

When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.