My System Harvests Devil Fruits

Trapped in the treacherous world of One Piece, Will, a former secret agent, was nothing but a fragile human surrounded by monstrous Devil Fruit users. He cooked and served, living on the edge, constantly fearing the day his weakness would be exposed. But a ruthless system awakened within him: The Devil Fruit Hunter. Every Devil Fruit user he killed would yield their power, ready for him to consume or exchange for legendary abilities, even Blackbeard's mythical multi-fruit body. His first target, a temperature-manipulating pirate, fell to his poison, granting him overwhelming power. But as the Grand Line's plot begins to unfold and legends like Straw Hat Luffy appear, Will realizes harvesting enough power to stand against the world's titans means turning the entire ocean into his hunting ground.