Age of Discovery: The Invincible Twelve Divine Beasts

The male protagonist transmigrates into the world of "One Piece" with the template of the Fourth Progenitor. He seeks out mediums to gradually awaken his Twelve Beast Vassals, then becomes invincible and changes the world.

Logia users: It's the first time I've thought becoming an element was a pain. Elementalization makes you immune to physical attacks, but what the hell is with these magic attacks?

The Four Emperors: We can't beat him even with all his terrifying abilities, and now he's siccing his Beast Vassals on us. We might not beat even one, and he's sending several...

Imu: I'm getting ganged up on by twelve...

The Five Elders, too busy to help: Lord Imu, please hold on! We'll come help once we've dealt with these traitors...

Imu: ...

Beast Vassal abilities: Reflect attacks, break through nonphysical barriers with physical force, devour dimensions, turn into mist, control lightning, destroy physical forms through causality, manipulate gravity, resist and neutralize poison while stealing abilities, destroy through vibration, control minds, heal through time, and freeze.

The mediums are famous beauties from the world of "One Piece", with one Beast Vassal for each medium.

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