If You Don't Dream, Do You Still Want to Cultivate Immortality?

Wu Xiao travels through the world of immortality, awakens the talent of Dream Spirit, and can get whatever he dreams of. But all he dreamed about were rags, so he opened a grocery store in the sect and planned to expand his business to Kyushu. As the only disciple of a generation of kendo masters, my days went on peacefully—— ? In the dream, a man stood alone in the middle of a mountain of corpses and a sea of ​​blood, surrounded by demonic energy and ruins beneath his feet. He wanted to see that person's face clearly - but found that the face was exactly the same as his own. Who is he?