Cutting Gale

You manifest blades of air that surround and lacerate your target. Make a ranged spell attack against the target. On a hit, the target takes 1d4 slashing damage and the blades surround them until the end of your next turn. On your next turn, as a bonus action you can cause the blades to cut your target again, taking 1d4 slashing damage. 

This spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4). This damage increase applies to both instances of damage.