For #2 Is this it?: A Gift of Release by Aeoris. It's not up on their journal anymore.
Summary: Basically the brothers stopped Lilith from opening the seals and killed her. Sam never went evil but Dean, after all that happened to him in Hell and what he had to do basically gives up on life. I mean, after going through so much torture and having to torture souls, it would destroy a person! He can't deal with the guilt of what he did and Sam's helpless to save his brother. Then Castiel comes with a 'gift' for the brothers. He says he has a way to free Dean from the memories of what happened in Hell and brain damages him with his freaky angel powers. Sam's furious, he doesn't think that Dean is still his Dean anymore, that he's too changed. But Dean is still the same Dean deep down, he hasn't really changed all that much, Sam is just too angry to see that.
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Summary: Basically the brothers stopped Lilith from opening the seals and killed her. Sam never went evil but Dean, after all that happened to him in Hell and what he had to do basically gives up on life. I mean, after going through so much torture and having to torture souls, it would destroy a person! He can't deal with the guilt of what he did and Sam's helpless to save his brother. Then Castiel comes with a 'gift' for the brothers. He says he has a way to free Dean from the memories of what happened in Hell and brain damages him with his freaky angel powers. Sam's furious, he doesn't think that Dean is still his Dean anymore, that he's too changed. But Dean is still the same Dean deep down, he hasn't really changed all that much, Sam is just too angry to see that.