Tōboefū

Tōboefū (遠吠え風, Howling Winds) is one of the seven Kyūtai forged by an unnamed Kidō master centuries ago. Its current location is unknown to all save Garian Shinjo.

Powers
Wind Dominance: Tōboefū gives its wielder complete control over the forces of wind as well as the air around them. The user can stop the wind currents indefinitely, causing the surrounding landscape to stagnate and wither. The orb also allows for the manipulation of wind in any form the wielder wishes.

Immortality: The owner becomes immune to the ravages of time upon their body, making them un-aging from when they acquired the orb. This ability is shared among all the Kyūtai.

Shape Manipulation: The seven Kyūtai all share the ability to freely change their shape, whether it be a ring, belt or sheath covering.

Behind the Scenes
This is influenced greatly by the seven Ka'kari in the Night Angel Trilogy of novels.