He Decides the World

[New double time travel (throughout the whole story) + fantasy + no harem (with a confidante) + no routines + not brainless + a little cool + a little sadistic] Xiao Bai descended into a dilapidated world of doomsday monks. Master wants him to practice seriously? No, he wants to take his senior sister to a barbecue in the back mountain... Resist the torrent of evil spirits destroying the world? No, he wants to return to this world... But, what to do? At the end of the Fifth Era, the peerless empress used her power to divide the Hongmeng Continent into two parts, using the power of the Huatian Mountains to resist the torrent of evil spirits that only knew how to kill and assimilate monks with black energy, thus protecting the monk world for a hundred thousand years. However, since then the empress disappeared, the way of heaven was lacking, the path to becoming an immortal was cut off, and the immortal was gone. The emperor of heaven only existed in ancient documents, and there were very few legends. What would he do with such a dilapidated world of monks?