Seafaring: From the Start, I Wield the Haotian Hammer

Yes, it's a One Piece cultivation novel, but it's a serious One Piece fanfic.

The story begins one year before Red-Haired Shanks becomes an Emperor of the Sea...

The protagonist transmigrates into the world of One Piece and awakens a System. By growing stronger step by step, he witnesses the rise of the Four Emperors, turmoil across the seas, and King Luffy's ascension to godhood... Of course, if King Luffy can become a god, surely it isn't unreasonable for him to cultivate immortality...

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.