Supernatural - The Reason Why

Guys I need at least 5 votes to keep this story going so if you enjoy vote :3 You have to have watched Supernatural season 4-7 to understand whats going on here. But basically Castiels back and lost in a different universe where the dead are very alive. Castiel stuggles to stay alive whilst Dean and Sam are searching for him like a need in a hay stack. Will they save Castiel for the last time or will Castiel become what the dead are. Dead.