The Mastermind Player: Starting with a Rewrite of the Grand Line

Kaiser transmigrates to the world of One Piece and unexpectedly gains the Creator System. Using templates, he creates powerful characters of astonishing strength, all born from his imagination.

The whole world of One Piece becomes a fantastical place.

Creatures from an ancient era, more terrifying than antiquity, appear.

The legendary gods descend and establish the Church of Light, drawing faith from ordinary people.

The legendary demons descend and establish the Dark Court, devouring ordinary people's despair, fear, and other negative emotions.

Ancient humans appear, along with a fearsome Mage Guild that hunts the gods and demons. They care nothing for ordinary people and seek only power and immortality.

Sengoku: The Ancient Weapons are just little scraps of technology left behind by the ancient era?

Akainu: The gods are the true enforcers of absolute justice. The Marine scum aren't worth a damn.

Kaido: Why do the people from this Mage Guild keep chasing me? What? They want to study me as a specimen?

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This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.