Chronicle of the Gods of the Era

Who made a hundred single and eight immortals descend to earth again? Who caused the three religions to fight again in the world? And who made us see the journey westward to learn the scriptures? Who is it that makes people from all over the world travel east to take a look at that illusory legend? It's him, it's him, it's him, even though I don't know who he is, it's him (There is no absolute protagonist in this book, or in other words, everyone is the protagonist. I hope you can find yourself in the book)