Looks like the background song of a movie. I like this
Listening to this piece makes me imagine how Link and Zelda are facing the greatest army of dark powers that ever marched into Hyrule. While the approach to the dark and evil forces is clearly given in this piece, it also has something very heroic to it. I immediately fell in love with this piece because of it's epicness. And because it combines some of my most favorite themes of the whole Zelda series.
Very nice, I really felt the dark atmosphere you were going for there.
Please contact me if you would like to use this in a project. We can discuss the details.