Ghost knife pirates of the pirate king

Introduction: A young man with a hole in his head rejected the invitation of a certain pirate, the grandson of the vice-admiral, the son of the leader of the revolutionary army, who seemed to be the king of the future world, raised the banner, and established his own pirate group. ...A black knife, a group of seemingly unreliable partners, their names are circulating on the great channel.The East China Sea used to be the worst, but now, there is only one monstrous and terrifying name left...Ghost Saber Pirates.