The prophecy came into being after Amon's war with the xel'naga, with the greater bulk of their species being consumed by the zerg, while the survivors returned to Ulnar. The xel'naga Ouros created the prophecy in order to guide the future races that possessed purity of form and essence to Ulnar where they would awaken the last of the xel'naga. The prophecy was stored in fragments on Ulaan. Valerian Mengsk also became aware of the prophecy. When he revealed this knowledge, Raynor was surprised. With the death of Arcturus Mengsk, Kerrigan took her Swarm to confront Amon.