The good, bad, and the ugly...
Well, I have to admit this is a pretty kick ass song.
But, I'm also going to be completely honest, its not exactly the best thing you've ever done.
I admit that I think for your next album, techno might be a good idea. You seem to have a good grasp of it. However, this does /not/ belong in the "Light and Dark" series. I don't know who talked you into it (I saw below you said a "friend" told you to mix it up....) but I think that was a bad idea. "Light and Dark" stood as a really, really good set of classical styled music. This sort of throws it out the window.
The only reason I would approve is that it shows you took my advice and are starting to branch out. Which is good.
Also, /as a song itself/, and not considering the "Light and Dark" thing, its fairly decent techno. Not the best. I like it, and I'd probably download it in a couple days here. However, to me, I think the reason I like it is because it gives me the feeling of a video game boss track. I could see a kick ass boss fight set to this.
And I don't know if others, who aren't old school gamers, would feel the same.
ALL IN ALL, you're still one of the most brilliant musicians on here and I love all of your "Light and Dark" series, even this (just not as a L&D piece). I just think its a little lacking, but thats why we try new things I guess. Thumbs up and I look forward to more.