Claws of Darkness

You pull wisps of shadow towards your hands and solidify them into elongated black claws. Make a melee spell attack against one creature within 10 feet of you. On a successful hit, the target takes 1d8 necrotic damage. After you make the attack, your fingers return to normal.

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