Tealeaf's Twirling Twister

You touch one willing creature and imbue it with the power to transmute itself into the very wind of Zovwia. Until the spell ends, the creature can use a bonus action, ending the spell, to transform into a dust devil and move 30 feet or less in a straight line. This movement doesn't provoke opportunity attacks and can pass through creatures. Each creature that it passes through must make a Constitution saving throw, or take 3d10 bludgeoning damage and gain the Blinded condition. On a successful save, a creature takes half as much damage only.

Using a Higher-Level Spell Slot. For each spell slot level above 5, the damage increases by 1d6 or the distance increases by 10 feet.