Atrophic Strikes

You create a sickening ring of vile energy to form around each of your hands. Any time during this spell's duration that you make a melee attack with a weapon or unarmed strike, you deal an additional amount of necrotic damage equal to 1d8 + your primary casting ability.

At Higher Levels. When casting this spell using a spell slot of 2nd or higher level, increase the necrotic damage dealt by 1d8 for each spell slot level above 1st and increase the duration by 1 minute.