Based on the information you provided, I recommend the novel, My Doppelganger in the Future, to you. The main character of the novel had a clone that traveled through another world. The clone could learn all kinds of advanced cultivation technology, alchemy, refining, and array knowledge. In the book, there were gods such as the Overgod, but it was uncertain if there were any scenes such as the clone of the sky. I hope you like this fairy's recommendation. Muah ~๐