Hogwarts: I'm the only one who cultivates immortality

Introduction: "Ye Feng! How many times have I said that you are not allowed to use swordsmanship to control flying broomsticks! You are not allowed to steal Hermione's wand and use your own wand as chopsticks!" This is a story of a traverser who single-handedly distorts Hogwarts' painting style; this is a story that makes Hogwarts senior management frantically revise the school rules to restrict our protagonist; this... should be an interesting story.