Dumbledore always thought that Voldemort was the biggest threat to the wizarding world, until a vampire who had lived for more than a thousand years came to his door with the title deed to Hogwarts——
"A thousand years have passed, and the lease of Hogwarts is up!" Dracula said,
"Mr. Principal, you don't want the students to be displaced, right?"
"What do you want?" Dumbledore asked solemnly.
"Anything interesting."
"This is easy to handle. I think the position of Defense Against the Dark Arts professor is quite interesting!"... So, Hogwarts has an extra professor that no one can care about.
McGonagall: "Albus, I don't think Professor Dracula's teaching is suitable for poor children!" Dumbledore: "I have no choice, no one can expel him."...Draco: "I Dad is the school director, I will definitely let him expel you!" Lucius slapped Draco on the head,
"Mr. Dracula, Draco is so childish, you must not expel the school board!"... This is a story about a vampire who has lived for too long and is so bored that he can only find fun in the magical world.