Whistling Blades

You call cutting winds to your aid. Each creature in a 15-foot sphere originating from you must make a Dexterity saving throw. On a failed save, a creature takes 1d10 slashing damage or half as much on a successful save.

You can call the winds with your bonus action on any turn until the spell ends.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d10 for each slot level above 2nd.