Invincible System Start From One Piece

The mc got choosen by the ''Crossing God'' to cross to many worlds along with the ''Invincible System''. Current world, One Piece. Note:*Writing this just for my own fun, and spend my boring time.*English is not my mother language. I apologized for my bad grammar and bad english.* I do not own One Piece, other Animation, Movies, Novels. Beside this :D