Star Train: I Became the World Tree?

[Bengtie Fanfiction] [Contains many worlds, at least Genshin Impact, Juequ Zero, and Collapse III.] [New book by an old author, feel free to read] Ye Yun traveled through time and became a dying world tree. Fortunately, he obtained a system that allows him to invite people from other worlds to his world to help him fight monsters. Those who are invited will receive a task panel similar to that of an online game. Killing monsters can gain experience and obtain drops. At the same time, Ye Yun can also obtain divine power to restore himself, or exchange for magical functions in the system and props from all the heavens and worlds. Years later, Ye Yun vaguely remembered the two heroes he had summoned at the beginning. A little gray-haired boy and a silly Fu Fu.