The power system in this book is set in Chapter 50. You can check it in advance if needed.

{Summoning build + Rocks Pirates starting lineup + No Mary Sue tactics}

Travel to the world of One Piece and awaken the mutant summoning system.

The X gene was directly modified to correspond to a Devil Fruit. Aliases: Pirate; started as a tiger, wolf, and dog, constantly entangled with Kaido; previously received many negative reviews for calling Whitebeard "Old Man," but has since corrected his ways and changed it to "Big Brother." Currently one of the Four Emperors.