Before the age of Luffy, before the Yonko held sway, a different kind of ambition stirred in the Grand Line. Seabury D. Arthur, a transmigrated soul, found himself on the brutal shores of Jaya in the year 1493. He was not content with weakness in the world of One Piece; he craved Strength. Five years of relentless preparation, of physical and mental torment, transformed him. He became a shadow, all in pursuit of one singular goal: the Rumble-Rumble Fruit. He defied the odds, riding the monstrous Knock-Up Stream, a heavenly river that carried ships to their doom or to the mythical Sky Island. He chose the latter. A year of tireless searching led him to a forgotten relic, a colossal ship swallowed by the White-White Sea, a testament to a bygone era. And within its depths, he found the object of his obsession. The Rumble-Rumble Fruit, a nexus of raw power, became his. Lightning obeyed his command, the very air crackled with his presence.