Dean-Centric crossovers

[dancinglassie]

I'm relatively new to the fandom and I'm looking for some good Dean-centric crossover fics. Preferably Harry Potter, Sherlock or anything with any of the Avengers. Not fussy, so I'll read any pairing.

Also a fan of Leverage, NCIS, Criminal Minds and House if there are any good crossovers with those.