Hmm. So, I've got an idea. I don't know if it could be worked into this story or not, but here's it is. Remember that drug threeEye in the first book? Well, what if during this time Kemmler teamed up with the Nazis and that was one of the experiments they were trying to do in order to create more powerful wizards to fight on their side? I think it would be possible because the point of the drug allowed regular people to see with a wizard's sight and Harry has gone on record that he believes that the basic necessity for using magic was the ability to detect. I could be wrong about that though ^.^;