Wow, that was fascinating. Such an interesting concept, I don't think I've seen the like before. I loved how it played on canon but told a story in its own right. I loved the Norse mythology with which I am not familiar. You seem to have really done your research.
There were a lot of very sad, moving bits--the emotion between Harry and Snape was tangible. The D/s scene was mmmm... very hot. I liked that a lot. :D
I really enjoyed this, babe, thanks so much for writing it. You always put your all into your fics, and it really shows.