Must find fic.
This is driving me crazy. I don't even know why I want to read this fic so badly suddenly.
Fully details that I can remember: It's set post!season 5 (written before season 6 started). Dean's about to kill himself and Cas stops him. Cas helps his nightmares and tries to help Dean -- travels with him, hunts. Dean starts to get better. Dean and Cas get together. The war in heaven is on. Raphael sends nightmares to Dean, figuring the best way to break Castiel is through Dean.
Fully details that I can remember: It's set post!season 5 (written before season 6 started). Dean's about to kill himself and Cas stops him. Cas helps his nightmares and tries to help Dean -- travels with him, hunts. Dean starts to get better. Dean and Cas get together. The war in heaven is on. Raphael sends nightmares to Dean, figuring the best way to break Castiel is through Dean.