(recharge 5-6)The dragon creates a cyclone in a 30-foot radius centered on itself. Creatures, other than the dragon, within the area can only move half their normal movement, nonmagical ranged attacks automatically fail, and all nonmagical unprotected flames are automatically extinguished. Large or smaller creatures within the area must also succeed on a DC 21 Strength saving throw. On a failed saving throw, the creature takes 20 (3d8 + 7) bludgeoning damage and is knocked prone and pushed 30 in a random direction. On a successful saving throw, the creature takes half damage and is not affected further.