The Dragon Professor of Hogwarts

I swore that I just went back to the old school to teach, so I packed my luggage, armed with a mouth of sharp teeth and a rebellious heart, and stepped into the castle again. But the ghosts in the castle were talking about me, the phoenix was staring at me, and the sugar jar in the principal's office seemed to have been opened just for me. And Professor McGonagall, who will call me "Mr. Grawley" in the past, present and future, looked at me like she was looking at a walking lesson plan accident. Forget it, it's here. Dear Voldemort, dear Tom Riddle, you may be able to escape death for a while, but death is still coming to find you.