The infestor later lost its ability to infest terran structures as well. * Dark Swarm * This ability was removed by October 2008. * This ability was automatically researched. * Dark Swarm worked similarly to the defiler's version, creating a smokescreen for units to hide under, protecting them from ranged attacks. * Dark Swarm protected units from a ghost's Snipe attack as well. * A roach's attacks were unaffected by Dark Swarm. The infestor used to have these abilities as well.