This is very good
This definitely sounds like it's a boss battle song, and although I feel it should be a lot heavier, I do like it a lot. For a four day deadline song, it is exceptional. You don't often find something like this made in such a short time. You did a very, very great job on this. The strings sound a bit fake, and some other VST's do as well, but that's probably not going to be noticed by anyone playing a game and trying to beat a boss. It would have been better had it sounded more evil/epic though.