Harry Potter: Dragonlord?

Or 'A bunch of weirdos from a kingdom that no longer exists go to Hogwarts, withut prior knowledge of the existence of said kingdom.' In which Fred and George Impersonate Trelawny, Harry hatches a dragon egg, the Camelotians are reborn, Merlin gets de-age-ified and goes to Hogwarts, and (duh) Arthur is a prat. Rated so because I ignore the possibility of K for some reason. idk why.