"So the sorcerer decided then and there to make the boy his apprentice. His evil apprentice, to carry on his legacy of evil when he was gone, because the sorcerer wasn't smart enough to spend his time researching ways to not die of old age. Naturally, the boy wasn't at all interested, but the sorcerer threatened the boy's parents until he was forced to comply.
Every day, the sorcerer would teach the boy evil magics and assign him tasks while he was out arresting people. And every night, the boy would sneak out of bed and read what books the sorcerer had on magic that wasn't totally evil."