Black Flash

Space distorts around your fist and black lightning eminates from your hand as you try to strike a creature. Make a melee spell attack against the target. On a hit, the target takes 4d8 force damage and must succeed on a Constition saving throw or be stunned until the start of its next turn.

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.