Megalith -Agnus Dei- is a song of the Ace Combat 04: Shattered Skies Original Soundtrack; it is featured as the 13th track on Disc 2. It was composed by Keiki Kobayashi and its lyrics were performed by Namco Hometek Choir (a group of choral singers hired by Namco). It's the main theme of Ace Combat 04: Shattered Skies final mission, Megalith.