Even though his formal introduction in One Piece occurred relatively recently, Saint Jaygarcia Saturn has quickly become the greatest threat the Straw Hat Pirates have faced so far. With his mysterious regeneration powers, ability to immobilize or kill bystanders on sight, and the Mythical Zoan-esque Devil Fruit transformation he can activate, series creator Eiichiro Oda has set him up to be a truly formidable antagonist for the Egghead Arc.