Hunter Killers appear during the StarCraft II: Wings of Liberty campaign, functioning as Sarah Kerrigan's elite guard. They are slightly larger than normal hydralisks and have improved statistics. Other than that, the two are indistinguishable.
Hunter Killers can be mind controlled by hive mind emulators.
In Co-op Missions, Zagara can summon Hunter Killers.
Unlike in the original game, Hunter Killers do not receive a custom portrait.
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- Attack bonus for queens and zerg ground ranged units.
- +1 bonus to armor per level for zerg ground units.