same as starting track from here

http://www.youtube.com/watch?v=r-TlRjRc_VE

I can hear Orkidea's Unity in that video, but it's not a remix I'm familiar with. Oakenfolf is notorious for making his own remixes for exclusive play though.
Hope this helps.

ah thanks. i think i also heard a sample from dead can dance the host of seraphim.

That's what the Unity track is based on. Awesome tune, does sme serious damage to a crowd!