This building activates the production of Defiler.The building also includes the evolotions of Defiler.The first one activates the plague ability of the defiler which is a red fluid decreases the applicatd locations life energy.The second evolution is consume ability which converts the own units life energy to the mana for the usage of Defiler.The third one is Metasynaptic Node which improves the mana capacity of the Defiler.The building cost is 100 mineral and 100 gas but it is available at the last age of The Zerg swarm.