I, Xu Xian, Cannot Be the God of Swords

Traveling through time as Xu Xian, I thought this was just a simple new world. I turned on the monster-fighting upgrade system and quietly waited for my beautiful wife to come to my door. Unexpectedly, Xu Xian became classmates with Ning Caichen and Liu Chenxiang one after another. Xu Xian fell into deep thought. What kind of world is this in particular? "Master Guan is here!" "I am a rough/reckless hero Xu Xian!" "I am the undead knight Ning Caichen!" "I ride the Fox Immortal Liu Chenxiang!" "Today we become brothers with different surnames. We don't ask to be born in the same year, the same month, and the same day, but we ask... To be rich and noble, and never forget each other!" Ning Caichen: Among the three brothers, I am the most special, hehe! Liu Chenxiang: Among the three brothers, I am the strongest, hehe! Xu Xian: Haha... When Liu Chenxiang made a fuss in the Heavenly Palace and wanted to leave with Sun Wukong on his back, but was seriously injured by Yang Jian, Xu Xian slowly pulled out the iron sword and destroyed the thirty-third heaven with one strike. Xu Xian: I'm really not a sword god! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.