1-Any fics that have Castiel stopping/altering (or even being at) the crossroads deal made by Dean please.(Demon!Cas are fine)
2-Any fics that have Castiel being in the series before season 4 (Any situation, AU, Wee!Chesters etc. are okay.)
3- Specific Fic- A Dean/Cas fic (i think it was on livejournal) where Castiel intercepts the crossroads deal and kills the demon and (I think) becomes the holder of the deal, I think he was also a demon (but he ighht have been an angel) :/ Sorry about the lack of detail, it's one I really enjoyed but I lost the link :/ (EDIT-FOUND"It's All In The Details" by Colleen on fanfiction.net (http://www.fanfiction.net/s/7002492/1/It-s-All-in-the-Details)

Pairings: Gen or Dean/Cas only please