The Necromancer

Harry Potter disappears when he is four years old and the wizarding world believes him dead. But when his name comes out of the Goblet of Fire, Harry returns in a storm of lightning; a grown man raised in a world of violence, more powerful than anyone could imagine, and the worst thing of all? He doesn't care two knuts about the wizarding world.

Naturally, Voldemort is intrigued by this new and improved adversary.