Infestor

The Infester is a Zerg unit set to appear in StarCraft II.

Overview
The Infester is a replacement for the Defiler, retaining its predecessor's Dark Swarm ability. It is capable of moving while burrowed. Its another extremely devastating ability is its "Infestation" ability, which can 'infest' any structure. An infested structure produces infested units. For example, an infested Barrack produces Infested Marines.