You gesture at a creature in range and unleash harmful arcane energy at it. Choose slashing, piercing or bludgeoning damage. Make a ranged spell attack against the target. On a hit, the target takes 1d8 damage of the type chosen. 

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