Desert Storm

A small spinning orb fires out from you to a point you choose within range and then blossoms with a low roar into a sandy maelstrom. Each creature in a 20-foot-radius Sphere centered on that point makes a Dexterity saving throw, taking 8d6 piercing damage on a failed save or half as much damage on a successful one.

Armor gets tarnished.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 3.