Cutting air

As you imbue a sword with arcane magic and strike with it, a thin sheet of air shoots forth from your blade. Each creature in a 10-foot cone must make a Dexterity saving throw. A creature takes 3d6 force damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.