Ultimate Creature Evolution

This is a story about someone who wakes up in a demon-slayer world, looks at the stone ghost face in his hand, and decides to become the ultimate creature. "Auntie, press it~~" "No! He has his back to the sun and is bathing in the sun's rays!" "He's... Invincible! He has no weaknesses! I guess the ripples won't work on him either. He's immortal, immortal, and immortal! No one can hit him! A complete creature, the ultimate creature, UltimateThing, was born!" But! He didn't stop there after that, becoming the ultimate creature was just the beginning! New abilities are constantly being acquired in other worlds! As a member of the Celestial Spirit clan, he gained the ability of a black hole and the ability to devour all things! Later, Mr. E's substitute was awakened! His evolutionary journey continues! This is the evolution of the ultimate creature! There is a holy city in the main world Traveling across the world: Demon Slayer: Kimetsu no Yaiba—Douluo Dalu—Fighting Through the Sky—JOJO—? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.