The Omen War was the ongoing conflict between the Tremere and Tzimisce clans in and around Transylvania during the Dark Ages. The war escalated, and grew to involve other clans, when it was learned that the Tremere had created their Gargoyle servants from the bodies of captive Tzimisce, Gangrel, and Nosferatu. As the Tremere established their power and the Anarch Revolt reconstructed Cainite society, the Omen War was forgotten in favor of more pressing concerns, particularly once the Camarilla and Sabbat arose.