Defiler

The defiler is a zerg breed that uses toxic substances to support other zerg forces.

Overview
The defiler is a relatively rare zerg breed, resembling a silverfish in appearance and acting akin to a 'cancer factory' in function. Its core genus, if it has one, is unknown, as the defiler contains the DNA of all other zerg breeds and, unlike the larva, uses them to synthesize virus-like biochemicals. These biochemicals are extremely hazardous, resistant to the most effective anti-toxins, and, paradoxically, dangerous even to the zerg. Defilers have been known to cannibalize other zerg to fuel the metasynaptic processes that generate the biochemicals, often accompanied by zergling escorts for this very reason.

The defiler's body is host to countless small organisms that live on the carapace, constantly feeding on each other. The defiler can spontaneously launch a number of these creatures to swarm a location that make it difficult to target anything under the ensuing cloud. In addition, defilers can produce corrosive spores and hurl them at a target area, the spores exploding in a dense cloud. The highly toxic mist that results corrodes anything it touches. The spores are also prone to igniting due to a flammable accelerate contained in them.

StarCraft

 * For StarCraft gameplay information see: Defiler (StarCraft).

StarCraft II
In StarCraft II, the defiler has been replaced by the infestor.Kerrigan chosed to remove them from the swarm as they were to hazardous and toxic, even to zerg, she replaced them with the Infestors, however , the original Overmind as seen to prefer them , the Overmind has also got a perfectionist trait , thus , very specific attacks perfectly planned made them very effective under her/his/it command.However , Kerrigan saw them to dangerous and risky.

Wings of Liberty
The bones of defilers make an appearance in Wings of Liberty as zerg research subjects on the level The Great Train Robbery.

Special Defiler Strains

 * Plague Bringer
 * Thakras
 * Unclean One
 * Zergrinch