Shen Ji gets a piece of a mirror. Through it, he can connect across time and space with all sorts of things: historical figures, characters from novels, anime, movies, games...
And so,
he meets the First Emperor, sees Zhenyuanzi, witnesses the liberation movement at the end of the Song dynasty, repeatedly cooks mushrooms with Jibril, and teaches Gudao how to rip Servants apart with his bare hands...
Then he discovers that, as he does all this, his own world is turning fantastical too: merging with other worlds, receiving visitors from beyond the stars, letting everyone cultivate the truth, placing the law above all, allowing fishmongers to wrestle dragons barehanded, and giving people instant access to an AR spiritual-energy network without any equipment...
And he is the source of all this evil.
