Whoa, sorry this is so late, but I haven't been on this comm for a while.

I might have something for you:

Are self-recs okay?

Leverage/SPN:
The Guy They Hired To Pull Your Ass Outta Hell
This is by far his most unusual retrieval yet. Eliot Spencer is hired to pull Dean Winchester out of Hell. Full title "The I'm The Guy They Hired To Pull Your Ass Outta Hell Job." Supernatural ep 4.01 AU, preseries Leverage
http://www.fanfiction.net/s/7132324/1/The_Guy_They_Hired_To_Pull_Your_Ass_Outta_Hell

Death:
Dioscuri
In Greek myth, when the human hero Castor died, Pollux gave his twin half of his own immortality - because brothers should always share. Dean plays a game of metaphorical chess with Death to get Sam back. AU set after 5.22 "Swan Song." Crack!fic.
http://www.fanfiction.net/s/6818413/1/Dioscuri