How many souls does Chang 'an fantasy beast need to ascend to heaven?

One hundred thousand. According to official website, the game "Chang 'an Fantasy", in the novel, the author sets that every beast must eat100000 to evolve into the ultimate beast, so the game also needs to eat100000. "Fantasy of Chang 'an" is a vertical version of a demon-catching mobile game developed by Shiyue.com based on the comic book Fantasy of Chang 'an with the same name.