I...I actually have no words for this. I have read a lot of fanfic, in different fandoms, and this stands as one of my absolute favourites of all time. I adore your Cas, I am desperately in love with him, I love the dreams and the fairy-tale quality, the way it was a rough re-telling of the Snow Queen. I love the imagery and the mythology, the revisiting of Cas's torture at the hands of Heaven. I love the idea that god is not God, and that the universe is not all encompassing, and that happy endings are happy even when they're sad. I almost wish you had kept this as your original screen-play, because I'd have watched this film in a heart beat. It's too good to be wasted in a fanfiction world where it will never be a legal and fully original piece of writing. But at the same time I'm glad you did, because I got the pleasure of reading it.

That is an awful lot of gushing for one comment, my apologies. But this story really sparked with me, and I shall carry it around with me for a while.