How can I ask for more?
Perfect. If you want one word to describe this song, that's the one.
If you want a bigger review, then I can definitely say these things for sure. First, this is just a superb battle theme, and it sounds like it would do very well as a boss fight theme. First, this is what I love to hear in boss fights...a slightly intense track that sounds like it gives a feeling of hopelessness, but at the same time, a sense of hope. And this track delivers both very easily.
In all honesty, I would love to hear what other boss themes you come up with (and I am thoroughly convinced that you could). But when it comes to this song, I simply couldn't ask for more.
Great job, man! Five and ten!