Good
First of all, nice effect with the thunder! The voice is inaudible but maybe you meant it to be that way? So far, I'd have to say this is my favorite piece of yours by far! It's very cool and intense while at the same time sort of giving off a sense of unescapable doom.
In the second part of this song... where it get's all slow... I think maybe an organ could have served you well. Personally, I think the way you ended this was not nearly as good as how you started it. It kind of left me hanging and wanting more.
A very nice piece with emotion and nice effects. I like it alot... keep it up!