[ Not doing well is. . .kind of an understatement at this point. He huffs a brief laugh.

But honestly this isn't funny. ]

There's no, uh, way. Sam. To kill Lucifer. Once he acquires his true vessel. [ He meets your eyes, listless. Sad. ] Dean's gone to get the Colt. Dean, uh. [ He swallows and looks away, brows creasing. ] Dean wants to go out fighting.

[ It's a suicide run. They've been planning it for a year and a half now. Cas understands. This is Dean's choice, and he'll follow Dean right to the end and into oblivion. It's the best thing for Dean at this point. ]