Fuwa Fuwa no Mi

The Fuwa Fuwa no Mi is a Paramecia Devil Fruit eaten by Shiki. It allows him to levitate things, such as battleships and himself. By levitating himself, he can take flight. This proves to be helpful as he had severed his legs to escape Impel Down, and with his prosthetic legs, his swords Outou and Kogarashi, he would have trouble standing straight without this power of levitation.