Hi all!
I'm looking for a story I read a while ago, but now can't find, and would greatly appreciate any help given.

In it, Albus Dumbledore decides to recruit John Winchester as a professor to teach about demons, since Voldemort had decided to team up with one.

I don't remember much about what happened, which is why I want to read it again - of course, if you know any similar fics, I'd love to read those, too.

Thank you!