Item from One Piece by Eiichiro Oda
The Op-Op Fruit — the 'Ultimate Devil Fruit.' Creates a spherical ROOM in which the user has absolute spatial control: teleportation, body rearrangement, personality swaps, and the ability to grant eternal youth at the cost of the user's life.
The Ope Ope no Mi was eaten by Trafalgar D. Water Law, the Surgeon of Death. Within his ROOM, Law is essentially God — he can rearrange anything: slice mountains without touching them, swap people's minds between bodies, remove and hold a person's still-beating heart, teleport objects across the sphere's diameter. The fruit is called 'ultimate' not because of its combat power (though that's considerable) but because of one specific application: the Perennial Youth Operation, which grants another person immortality at the cost of the user's life. The World Government paid five billion berries for this fruit on the black market before Law acquired it — they wanted to use the immortality operation on one of the Five Elders. Corazon, a Marine spy and Doflamingo's brother, stole it instead and fed it to the dying child Law to save his life, paying with his own.
A red heart-shaped fruit with swirl patterns. When activated, the user generates a translucent blue sphere called a 'ROOM' — anything inside that sphere is subject to the user's spatial manipulation. The ROOM can range from a few meters to enormous sizes depending on the user's stamina. Inside the ROOM, the user can swap objects, teleport, bisect people without killing them, attach body parts to wrong bodies, and manipulate the spatial relationships of everything present.
Also known as: Ope Ope no Mi, Op-Op Fruit, The Ultimate Devil Fruit