Creep colony

Creep Colonies help extend the Creep that is initially generated by a Hatchery. They also have the ability to evolve into a Sunken Colony (for repelling ground invasion) or into a Spore Colony (for repelling aerial assaults). The Creep Colony is not only necessary to expand the life-giving Creep but also for defense. --Spore Colony-- The Spore Colony is the Zerg means of aerial defense. Able to fling Seeker Spores high into the atmosphere, Spore Colonies can quickly ravage any incoming enemy air force. In addition to its anti-air capabilities, the Spore Colony also serves as a stationary detector against any enemy cloaked or burrowed units. Combined with the Sunken Colony, the Spore Colony can be a very strong deterrant against any invasion. --Sunken Colony-- The Sunken Colony is the Zerg means of ground defense. Using deadly Subterranean Tentacles to suprise and puncture enemy ground based units, the Sunken Colony can quickly turn the tide of a battle. The best use of the Sunken Colony lies in building them in clusters and using them in conjunction with Spore Colonies since they have no detection abilities of their own and would be unable to defend against cloaked or burrowed units.