Secure the Blessing by rahmi.

A Supernatural gen fic; Sam makes a wish. Dean is not pleased. It is 21,000 words of pure awesomeness, I don't want to spoil anyone further because reading this with no preconceptions is just an amazing experience. I love that the fic deals with the logistics of an action and its consequences. I love that Sam is not dumb, he's John Winchester's son and he knows that nothing is ever without a price or a sacrifice. And Dean, oh Dean, the BESTEST older brother ever.