Hogwarts: My Name is the Killing Curse

"Hello, stranger wizard, what's your name?"

"Avada Kedavra."

"Holy crap! What are you doing?!"

"......My name is Avada Kedavra, Avada. Kedavra."

"......Who gave you that terrible name?"

"I heard it was the Department of Mysteries."

"Do you have a grudge against the Ministry of Magic?"

"No, they wouldn't dare."

"......Then what should I call you? I can't just say a killing curse every time I see you, can I?"

"You can call me: The Guide to the Technological Explosion of the Wizarding World, the Pioneer of Muggle Exploration of Magic, the Ruler of the Hufflepuff Kitchen, the Ducklord, the Younofull......"