Cutting Gale

You conjure a burst of wind magic which appears as silvery blades of air in a 15ft cube within range, each creature in the area must make a Dexterity saving throw or take 4d8 slashing damage or half as much on a successful save. A creature that is in the air has disadvantage on the saving throw.
At Higher Levels:
When you cast this spell with a spell slot of 3rd level or higher, the spell deals an extra 1d8 damage for each level after the 2nd.