The body of the saint

 is a track in Xenosaga Episode III. It has not been released on any soundtrack or sound selection and not much is known about this track. It is a remix of a dark omen.

It plays in the following cutscenes:
 * The Testaments discuss 'correcting the errors' of the space-time anomaly on Old Miltia.
 * Shion faints shortly after Allen calls her on Fifth Jerusalem.
 * Roth Mantel and the Blue Testament consider the party heading to Rennes-le-Château with KOS-MOS.
 * Roth Mantel explains the necessity of destroying KOS-MOS with T-elos to the Blue Testament.
 * The Professor explains the dangers of staying in the past on Old Miltia.
 * Shion faints while reuniting with KOS-MOS after the Black Testament is fought.
 * Yuriev asks Mary and Shelley Godwin for the Arbiter code.
 * Ziggy reveals the existence of the Isolated Research Facility on Michtam.