Originally created and used exclusively by Daggoth of the Tiamat Brood, Hunter Killers protected Sarah Kerrigan's chrysalis in orbit above Tarsonis. Hunter Killers participated in the invasion of Brontes IV, assaulting a hidden base held by the New Dresdin Outlaws. Daggoth later sent a pair of Hunter Killers to escort Kerrigan when she infiltrated the Amerigo.