Air Slash

You slash through the air in a 15-foot long, 1-foot wide line originating from you. All creatures in that line must make a Dexterity saving throw. On a failed save they take 1d6 slashing damage.

This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).