DeaL (Dean/CastieL) AU

WARNING: Spoiler from Supernatural, All seasons! And maybe a bit slash...(and the audio is strange...)

Dedicated to MACCHAN, ANNA, LINA, FEDE and LAN!! \ o /
i can't believe it! i have actually finished and uploaded THIS...after MONTHS of blood! Is official, SPN and Dean/Cas owned a part of my brain, I need to be exorcised ..

Story

Remember when in the episode 1X11 "Scarecrow" Sam left Dean alone for search John? This AU begining from there.

Dean meet Castiel, the angel is stuck on heart and need help for find part of his grace, so Dean tries to help him. Time passes and during the many hunting Dean and Castiel became friends and the angel start to think to stay on earth for good.
Dean is mortally wounded, Cas, still and angel in the middle, understand that without Dean he did not even care to continue the search of his grace's piece.. Castiel decided to summon a demon for make a deal.
The demon, intrigues by Castiel, as an angel, ask for a unusual deal: Dean will come back if Castiel will change is nature of angel and became a demon, he must lose the last piece of grace reamined.
Castiel would never have thought that could decided so easely.

Ending?
he is still the same Cas guys, even if he is became a demon..so i think is an happy ending..(what? they are together at least..XD)

Note
About the DEAL, is a sort of simbol in SPN. Mary make a deal for save John, so John do the same for Dean, Dean for Sam. Sam try to make one too, and in the end Bobby! All member of the family have make some sort of deal for save each others...so i think Cas will make a deal too.

clips: Supernatural (All season)
music: Time - Hans Zimmer (Inception OST)