One Piece's Final Saga has introduced fans to quite a lot of incredibly powerful villains already, despite the story having barely entered this segment. The Final Saga is going to be absolutely immense, with greater villains and higher stakes than ever before, and fans have already seen glimpses of that in the Egghead Island arc which is currently ongoing. In the Egghead Island arc, the primary antagonist is none other than one of the Five Elders, Saint Jaygarcia Saturn.