Hmm...
Not really sure what to say about this...
The effects were pretty nice and you orchestrated it perfectly to fit 'Entering The Stronghold' but there were a few snags.
The main one is how you implemented the music. You just began halfway through the song (something I noticed right away) and it was so quiet that the epic feel of it just went away.
Fixes: Fade in the music. Make it a LOT louder. This piece was visual expression with music as a guide. I don't have a clue what you wanted to convey if I can't hear anything.
8/10 (Minor improvement needed)