One Piece: From the Start, I Summon King Arthur

When he wakes up, Lin En discovers that he has transmigrated into the world of Pirate King, a place he had long dreamed of but that is also fraught with danger. He has even become the king of a poor, weak island nation in the East Blue, constantly bullied by pirates. A hellish start from the start? No. He has also brought along an overpowered golden finger: the [Grand Order Summoning System]! Starting with a feeble kingdom, Lin En leads an invincible army made up of the greatest Heroic Spirits in history and sets out to conquer and transform the world. He purges the pirates running rampant, develops technology and improves people's lives, recruits powerful allies who share his ideals, and continually expands his territory. His goal is far more than carving out a corner for himself. He will bring an end to the Great Pirate Era, begun by Roger and awash in bloodshed and plunder. He will shatter the Celestial Dragons, descendants of the gods who rule from the pinnacle of the world and enslave all living beings. He will break the shackles of the old world and establish a new world order of his own, where true freedom and order coexist! From a remote corner of the East Blue to the Grand Line, from the Shichibukai to the Four Emperors, all the way to the highest throne in Mary Geoise! Witness how a transmigrated king wields Heroic Spirits as sword and shield to write an epic saga that turns the world upside down: beginning in the East Blue, ending with the world!