The Immortal Emperor Falls to the Mortal World

One of the greatest Immortal Emperors in the Immortal Realm, a domineering ruler who reigned over the endless Northern Immortal Domain, was struck down into the mortal world by an unknown enemy during an expedition, and his memories were sealed. He thought he only had to follow the experience he'd gained before and start all over again. But it seems that from the very beginning, he was caught up in the calamity of the Immortal Realm Era and the calamity of the extraterrestrial demons. What changes will await him this time when he rises back to the Immortal Realm?