Wyper the Berserker. (One Piece, Vol. 28) - Hardcover

As a child, Monkey D. Luffy dreamed of becoming King of the Pirates. But his life changed when he accidentally gained the power to stretch like rubber...at the cost of never being able to swim again! Years, later, Luffy sets off in search of the "One Piece," said to be the greatest treasure in the world...

The Straw Hat pirates embark on a plan to become superrich. They just have to find the hidden treasure in El Dorado, the lost city of gold, and then make a getaway on their ship. But unknown terrors lurk around every corner of this island paradise known as Skypiea, including a tyrant named Eneru who enjoys making a game of death!