One piece: Ragnar D. Sabre

The world of one piece, A world of wonders, A place where wacky and weird powers known as Devil fruits exist A wonderland of amazing things and weird Geography. Though it is all that, it is not entirely sunshine and rainbows, it is a world as dark as a void, a place where slavery exists, a place where murder is a daily occurrence, A world in which pirates run amok, pillaging and destroying.

What would happen if person with knowledge of the future reincarnated here, someone who can change the entire landscape of this world with just a few words. His name is Ragnar, Ragnar D. Sabre.