I Work in the Dragon Clan

Ye Ze, a street boy in a small coastal town without a father or mother, had inexplicable dreams. He was taken to Kassel College by an inexplicable person and went to slay a dragon inexplicably... The earth is in turmoil, the World Tree is reborn, the emblem of Kassel College is shattered, and the tragedy of reincarnation ends. The first generation comes. (I don't know how to write an introduction. To put it simply, it's a dragon fanfic. The protagonist is a native of the world. He grows up a little bit and has a personal setting. The author's writing is a bit bad. Please bear with me. It's really toxic... I don't mind you scolding me.)