Hi, I just read Absolution by wolfling and omphalos, and I was wondering if there are any other stories like that out there.

Basically, what I want is to see Cas making a sacrifice to save Sam, because he knows how important Sam is to Dean. The sacrifice can be anything, falling from grace, losing his wings, or literally taking a bullet/knife on Sam's behalf. Similarly, I don't particularly care what it is that Sam is being saved from. It may be a demon, monster, curse, or even his own addiction to demon blood.

All I want to see is,
a) Castiel making a personal sacrifice for Sam because he knows how much Dean loves his brother
b) Dean's gratitude afterwards.

Thanks in advance! :)