Doku Doku no Mi

Magellan, warden of the undersea jail Impel Down, owes his terror to this Paramecia, whose English editions call it the Venom-Venom Fruit. Whoever swallows it becomes a Poison Human, gaining command over toxins of nearly every sort alongside complete resistance to them. Its Japanese name plays on doku, meaning poison, and on an onomatopoeia for liquid gushing in a steady stream, which suits the mostly fluid nature of what it produces. First named in Chapter 528 and Episode 425, it is notable for being explained before its power was ever shown.

Though it seems to conjure an element, the classification is Paramecia and not Logia, a point Caesar Clown later stressed. The distinction matters because the wielder cannot dissolve their body into poison the way a Logia melds with its element; they only generate and steer the substance.

Toxins made this way run an enormous gamut, from a faint irritant through paralytics up to fast, corrosive killers, and they appear as liquid or vapor. Since Magellan is untouched by any poison, he wades freely through his own. Great volumes of the liquid can be sculpted into monstrous forms, a many-headed serpent or a fiend among them, funneled into a tube for swift travel, or worn as a thick coat that keeps foes from striking him for dread of contamination. Curing a victim grows steadily harder as poisons pile up: a lone toxin may yield to an antidote, but several mixed together turn treatment into an excruciating ordeal that drags on for days, and a careless attempt can hasten death. His deadliest brew glows crimson and creeps across whatever it touches, gnawing through even stone like acid, potent enough by his own boast to raze the prison. The power has limits. Flame cancels much of the liquid, some materials such as Galdino's wax resist his ordinary output though the red strain still eats through them, and his own gut cannot process poison, so his habit of lacing meals for flavor leaves him bound to the toilet for roughly ten hours a day. Survivors of a poisoning can build antibodies granting lasting resistance, as Luffy did.

Magellan swallowed the fruit in childhood, having accidentally slain a flower he was watering. Running Impel Down, he applies it endlessly: silencing insubordinate guards like Hannyabal with a puff of mild toxic breath, sealing prison exits behind poison walls, and executing inmates outright. Delicate control lets him cradle a Baby Den Den Mushi to his face without harming it even while coated in venom. His signature Hydra raises a three-headed acidic dragon that melts its prey, and Venom Road lets him ride through its necks. Chloro Ball bursts into tear gas, Doku Fugu inflates him to absorb a blow, and Doku Gumo lays down a draining fog. His ultimate, Venom Demon: Jigoku no Shinpan, forms a giant crimson devil mirroring his motions whose toxin infects even non-living objects.