Angels crossing over

[glisto.livejournal.com]

Looking for crossover fics (any fandom) where Gabriel or Castiel (or other Supernatural creatures, but preferably angels) baffle people with their powers. F. ex. something like  The Origin of Theobroma (SGA/SPN). I absolutely loved it, even though I didn't really care for the pairing (McKay/Gabriel), and would love to read more like it.

I'm also looking for fics where people try to figure out the angel killings - puzzle over the burnt wings and stuff. Don't care if they're crossovers or not.

Thanks in advance!