 Zurvan embodied the "survival of the fittest" ideals the primal Zerg pack leaders operated on.Zurvan was wary of the Overmind and the hive-minded Zerg swarm, believing that losing ones individuality to a single indomitable will is a terrible evolutionary fate for a strong Zerg.He was spawned before the Overmind, and lived to see the return of the Zerg Swarm to Zerus during the Second Great War.