The Jiki Jiki no Mi is a Paramecia-type Devil Fruit which allows the user to create magnetic forces and use them to control metal. It was eaten by Eustass Kid. The Jiki Jiki no Mi enables the user to generate magnetic fields that can either attract or repel metallic objects to and from their body as they please. This makes them particularly effective against the majority of weapons in the world: namely swords, guns, and cannons. By using repulsion, the user can deflect metal projectiles back to where they came from, turning them against the aggressor.

Using attraction, the user can strip opponents of their weapons and bring them to their own body, rendering said opponents helpless. The user can also use attraction to pull themselves to large metal objects like ships, allowing them to travel through the air in a manner resembling flight. In general, the creatable magnetic forces are extremely strong and very difficult, if not impossible, to resist; by wrapping a metallic arm around Big Mom and repelling it, Kid was instantly able to send her flying up in the air, a noteworthy feat considering Big Mom's massive size and weight.