The collection of distorted roars, incomprehensible noises, and angry strings you used in the intro all work together brilliantlly to give listeners a free trip to lands of dark fantasy. Could use a little touch-up on the mixing side of things-- there's a couple of sounds that seem to cut out a little suddenly. That, and the middle (around 1:30-1:38) also loses a little of the looming presence the beginning and end work so hard to create. I'd suggest keeping something in that little section so that it doesn't feel quite so separate from everything else.
Please contact me if you would like to use this in a project. We can discuss the details.