He is reported to have added another idol, that of the god Zaden, to the Iberian pagan pantheon, and to have built a fortress to house it.
Prior to 90 BC, Pharnajom converted to Zoroastrianism, abandoning K'art'velian polytheism.
[1] His nobles sent an ambassador to the king of Armenia promising the throne to his son, Artaxias.
[2] At the battle of Tasiri between Pharnajom and his nobles, the king is defeated and killed, and the crown given to Artaxias I of Iberia.
[3] Pharnajom's son, Mirian (Mirvan), survives, however, to be taken and brought up at the Parthian court.