Devour Essence

An nimbus of energy surrounds a creature in your vision in black fire. Make a ranged spell attack against a creature within 60 ft. of you. On a hit, the target takes 3d8 necrotic damage, and you regain hit points equal to half the amount of necrotic damage dealt. Until the spell ends, you can

At Higher Levels. 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.