Now I understand why we couldn't guess that middle track. It's a remix of Balrog's Theme, which I assumed wouldn't be in the bonus disc because it was in the first disc. The sample also didn't contain any notes from the actual song, so that's confusing too. It actually sounds like Break Down until the song proper starts 1/4 the way through.
Purposeful?
Edit: Guy... Icewind Fortress. What were all those notes I didn't recognize? You were remixing a song, not writing your own, remember?