Black Tower

 Black Tower is a song included in the Halo 3: Original Soundtrack. It plays during the level The Covenant, and is the second movement of the Covenant Suite. Also, when you play it in reverse, you can hear a message from Gravemind. It's related to T.S. Elliots' poem, The Hollow Men.

The message in this song says: "Eyes from death's dream kingdom appear as sunlight on a broken column. There, in death's other kingdom, walking alone, trembling lips form prayers to broken stone." The quote is from The Hollow Men by T.S. Eliot. http://www.youtube.com/watch?v=LsEo2u10ziM It runs for 6 minutes and 3.702 seconds (6:03.702).

The second half of the piece, "Heroes Also Fall", is a remake of the "Rue and Woe" movement of High Charity Suite, and is appropriately played during Miranda Keyes' death scene.