Urgo-Hem was one of the 369 Ogdru Hem, the children of the Ogdru Jahad. Urgo-Hem was freed from imprisonment through the blood of a 16th century Spanish priest. The priest had spent time in Tenochtitlan before it burned, and had learned the history of the Ogdru Hem there. After being persecuted by the inquisition for his knowledge, the priest was eventually squirrelled away by a secret order dedicated to preserving treasures of the ancient world.