Spawning pool

The Zerg Spawning Pool is a pit of primordial ooze in which is contained the genetic makeup of the Zergling, thus giving Larvae the ability to morph into Zerglings and the Hatchery the ability to evolve into the Lair. The Spawning Pool is also responsible for evolving the Zergling with Metabolic Boost (faster movement) and Adrenal Glands (faster attack).

StarCraft II
The Spawning Pool is set to appear in StarCraft II. It allows the spawning of Zerglings and offers upgrades such as increased movement.

Upgrades
The Spawning Pool has three Zergling upgrades.

Evolve Zergling level 2
 * Research Cost: 200 200  170 seconds

Evolve Zergling level 3
 * Research Cost: 300 300  200 seconds