Arid Cleave

A cleaving wave of sand cuts through the air in a 30-foot cone, originating from the blade. A creature within the cone must succeed on a DC 17 Dexterity saving throw or take 2d6 slashing damage and 2d8 fire damage, or 2d10 fire damage if you have one or more levels of exhaustion. Once this property has been used, it shouldn't be used again until the next dawn. Each time it's used again before then, you gain one level of exhaustion. You can use this property once on each of your turns.