Oto and Kogarashi

Outou and Kogarashi are a pair of double-edged swords wielded by Shiki. Though it is unknown what special properties they have, he notes them to be famous. In the past, Shiki wielded them as regular swords, but eighteen years ago, after severing his legs to escape Impel Down, he grafted both Outou and Kogarashi onto where his missing feet is. They have since became his prosthetic legs.

Abilities
Shiki has been shown to wielded both of his swords with great skills. He was powerful enough to kill a mass amount of soldiers in Marineford, as well as challenged famous characters like Gol D. Roger, Monkey D. Garp, and Sengoku with them.

After the two swords became his new legs, he has shown to be able to send out air-based slashes by kicking with them, similar to Rankyaku.