Ring of the Wind is a unique ring and artifact. In the book Tamrielic Lore by Yagrum Bagarn he states the following: "No facts are known about this Ring, but the title and the few rumors lend one to think it grants the wearer added speed." Despite Yagrum's suspicion, the ring empowers its wearer with Agility rather than Speed.
Lalatia Varian at the Imperial Chapels in Ebonheart requests that the Nerevarine retrieve this ring from the caves of Nammu in the Grazelands region. The ring is worn by Galmis Dren, who is protected by five fellow smugglers. They must all be slaughtered to obtain it.