Hogwarts: I am the Only One Who is Practicing Immortality

"Ye Feng! I've told you so many times not to use sword-riding to fly a broomstick! And you are not allowed to steal Hermione's wand and use your own wand as chopsticks!" This is a story about a time traveler who single-handedly changes the style of Hogwarts; this is a story that makes the Hogwarts executives frantically modify the school rules just to restrict our protagonist; this... should be an interesting story.