Hogwarts: The Unforgivable Curse at Max Level from the Start

Dylan: "By Voldemort, I just mastered the Unforgivable Curse at max level, please believe me, I'm really a good kid! Just look at what I've done at school!"

Professor McGonagall: "You mean, the fact that you defeated an entire gathering of Death Eaters with a hundred casts of the Soul-Sucking Curse per second, and that you can control a group of Dementors at will?"

Dylan: "No, what I mean is, I've read every single book in the library! All my classes are at max level, and so is my magic! I even defeated Voldemort with the Unforgivable Curse!"

Professor McGonagall: "Right, exactly, those cultists even want to nominate you as the new Dark Lord!"

Dylan: "Oh my, Professor, isn't this easy to resolve? I'll just cast Avada Kedavra and wipe out all those Death Eaters, and then no one will want me to be the Dark Lord!"