One Piece: I Have a Few Too Many Secret Identities

Bai Yu transmigrates to the world of Pirate King and gains the "Origin of All Things." As long as he obtains a mysterious power, he can unlock a new gene. From then on, he has countless secret identities.

Jormungandr: "I am the ruler of the seas!"

Accelerator: "Sorry, this road is blocked."

Pain: "Feel pain!"

Uchiha Obito: "Your Armament Haki can't hit me..."

On Whole Cake Island, Bai Yu plunges his sword into Big Mom's chest and says, "In the New World, the Four Emperors reign supreme. But above them all, I alone am the White Emperor!"