"Tunnels through crust. Escapes quickly. Elusive."

The ash worm is a burrowing life form native to Ignus. Abathur deemed its ability to quickly burrow through the crust useful for the zerg's swarm hosts to assimilate, creating the creeper strain.[1]


  1. Blizzard Entertainment. StarCraft II: Heart of the Swarm. (Activision Blizzard). PC. Mission: Heart of the Swarm, Swarm Host Evolution (in English). 2013-03-12.