The world of One Piece features the incredible Devil Fruits as its primary power system. Devil Fruits are mystical fruits that grant unique powers to the eater at the cost of their ability to swim. Naturally, they're all highly coveted. While the vast majority of the Devil Fruits feature basic abilities, Oda has also introduced quite a few unique Devil Fruits that stand out in one way or another, either breaking the rules of Devil Fruits, or existing as unique entities on their own.