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. Disclaimer. *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