I'm looking for a story I read where Michael gives Dean his powers and I think at first Dean is unaware, it's not Shine. I think it's au mid or post season 6 but I'm not sure, I know Lisa and Ben are mentioned. There's a scene at Bobby's with Cas teaching him to move things. There's a croatoan virus outbreak but before the virus gets out of the warehouse or facility Dean and Sam and Bobby are told about by I think Crowley, however when they rescue survivors some of them were infected and they didn't know so it spreads. They set up base at Camp Chitaqua. Angels turn up to help dean because he feels like Michael to them. In a group of rescued people Sarah Blake and her father turn up. A group of people brought to camp are caught by Dean using drugs and he manifests his sword because he doesn't want that around Cas. Also Dean uses his powers to recharge Cas periodically.I think it becomes destiel but I'm not certain. At some point they are investigatinga town and Meg appears and almost kills them but Dean is able to smite her and shield Cas, Sam and the Impala from damage with his wings. I included gabriel and balthazar even though they're not a large part of the story in the tags.

Edited to add found and of course I got the seasons wrong thanks! :)