One Piece : Mythblade

In the golden age before the Great Pirate Era truly began, when the Roger Pirates still sailed across the Grand Line seeking the truth of the world, fate brought aboard a mysterious youth—Toni, a boy the same age as Shanks, but with a talent that defied all explanation.



Born on a remote island shrouded in storms, Toni awakened Observation Haki at the age of six and displayed a natural affinity for swordsmanship said to be descended from a legendary warrior tribe that vanished from history—the Mythblades. His every swing echoed forgotten techniques, and his instinct to perceive danger bordered on clairvoyance. It was this power that caught the eye of Gol D. Roger himself.



Sensing destiny at play, Roger invited the boy to sail with his crew—not just as a passenger, but as a disciple. Under the shadow of legends like Rayleigh, Scopper Gaban, and a young Shanks and Buggy, Toni’s journey begins not as a pirate, but as a seeker of truth, strength, and identity.



As the crew draws closer to Laugh Tale and the secrets of the world, Toni begins unlocking not only deeper layers of Haki but also his forgotten lineage tied to a mythic sword called Tenryūzan—"Heaven's Blade". But the world is watching. Agents of the World Government, rival pirates, and even mysterious relics of the Void Century are drawn to Toni's existence.



In a world where legends are born from willpower and freedom, Toni must carve his own path—as both a blade forged in myth and a storm destined to reshape the era.



Main Themes:

Brotherhood between Toni and Shanks, showing different paths to greatness.



Mentorship and legacy, focusing on Roger passing his will to someone besides Shanks.



Mythology of swords and haki, including ancient swordsmanship arts lost in time.



Worldbuilding, involving ancient tribes, Void Century secrets, and pre-Great Pirate Era politics.



Tragic foreshadowing, as Toni’s path will split from the Roger Pirates’ ultimate fate.