Correction: Oryx sisters sacrificed themselves to him in order to ascend his Blade Logic enough that he could slay the god Worm, Akka, and devise a way to defeat death and make their immortality feasible. Later, Oryx "described" his sisters by performing acts in their honor that extinguished life on a galactic scale, which had the effect of resurrecting them from "true" death.

They both were revived, when he done so much war and cunning