Finally, it's like a conscience discovery (if angels have the right to play). He gave up his strength, but Leviathan didn't return to purgatory, and Cam was blown apart in the lake. Then Leviathan got along well with humans, causing great trouble to Sam and Dean, and Bob died. Finally, I found Cam, and then my memory was restored. SAM's nightmare shifted to himself and became a little neurotic. . . Finally, a Leviathan was killed, and Dean and Cam were sent to purgatory.