Final Fantasy Versus XIII's *FANMADE* boss battle theme. If you've watched the trailers, you may recognize the melodies used in Somnus. =3
Again, this theme is fanmade. It could have been nice to add some lyrical vocals to it from times to times but hey, nothing sounds as good as a real human voice. [And I can't do it myself ! Otherwise it'd turn from "dramatic" to "pathetic". x] Also, I plan on writing more songs for the yet-to-come FFvsXIII.