Bracers of Whirlwind

Bracers of whirlwind transform you into a violent storm in which you may trap your foes. This set of thin electrum bracers is engraved with images of blowing leaves and swirling clouds. The bracers, slim enough to let you easily hide them under loose clothing, adjust to fit when you don them. Once per day as a standard action, you may cross your arms at the wrists and invoke the power of the bracers of whirlwind by exhaling a deep breath. The transformation lasts for 15 minutes, although you may dismiss the power of the bracers early and return to your normal form as a move action. The bracers transform you into a violent whirlwind made of air, granting you DR 10/magic and a flight speed of 100 feet (perfect). The whirlwind form is 40 feet high and behaves in all ways as the whirlwind of a Large air elemental.
Moderate transmutation; CL 7th. Craft Wondrous Item, gaseous form, 4,900 gp, 392 XP, 10 days. Weight: 1 lb. Price: 9,800 gp.
Source: Dragon #347