Harry Potter: I Am a Prisoner of Azkaban

(Made by scraps) He, Bai Moqing, is a disciple of the Dark Lord Grindelwald. He was taught magic by Dumbledore and fought against mysterious people. He is known as the third generation Dark Lord. Now he escapes from prison and comes to Hogwarts, where he works as a Defense Against the Dark Arts professor. It's time to die! A generation of dark wizards who escaped from Akazban prison come to Hogwarts to teach defense against dark magic! "Ahem, let me reiterate, it is really impossible for me to help Voldemort who doesn't even have a nose. He has no right to instruct me!" "We all understand the truth, but can you please put down the Minister of Magic first." The hands of all the Aurors holding their wands were trembling. "Bai Moqing! Where is my Veritaserum?!" Snape stated that his hair was decreasing day by day. "The biggest mistake in my life was to teach Bai Moqing, and the same is the greatest honor." Dumbledore said in a life interview, full of helplessness. (The new author's writing is not good, please forgive me. Updates as the occasion arises) The introduction is relatively weak, please read the text, thank you.