Contained within the primordial ooze of the Spawning Pool is the basic genetic makeup of the most prolific of the Zerg warrior breeds, the ravenous Zergling. Once grown, the Spawning Pool provides the genetic information to any Larvae produced by the same cluster, allowing them to metamorph into Zergling.

• Metabolic Boost. This alteration of Zergling physiology serves to increase their reflexes and rate of movement.

• Adrenal Glands. Changing this delicate glandular balance induces a kind of battle frenzy that increases the rate at which Zerglings attack.