Futо̄: Shibariyoku

Kegareru: Tethered Wings is a blade forged by Yuigon Fukyuu with his kihaku gauntlets enabling him to forge the steel blade of the Yomi realm into the very bone of Yaban's brother.

Acquisition
This Sword is unique in its own way since its energy is foul like any Kiwara giving it a much more sinister presence around any human. The blade not only gives the wielder more boost of power but it enables them to regenerate as quickly then they regularly could, with Yaban wielding it she is shown have a much more insane look and urge to kill anything or anyone in sight or within her sensing range but as the years pass she has better control of her urge to slaughter and more control over her foul chakra.