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The locust is a unit spawned by the swarm host.

Overview

Locusts are short-lived,[1] ferocious, parasitic symbiotes.[2] Powerful for their size,[3] they are spawned from the millions of larvae that inhabit the swarm host's bloodstream. When the swarm host is threatened or engaged in combat, subtle chemical signals instruct the larvae to head for its incubator, where they are evolved into locusts.[1]

Originally,[3] locusts attacked any nearby enemy with volleys of acidic saliva.[2] Since evolving pressurized air glands, locusts can attack aerial targets, and have developed the ability to fly themselves.[3]

Game Unit

The swarm host creates 2 locusts manually, with a cooldown of 60 seconds. It is not autocast, but can be used whether the swarm host is burrowed or not. [4]

LeapUrsadon SC2 Icon1
Swoop

Orders flying locust to land at target location, so it may attack enemies.

Usage
Hotkey Z
Cooldown 0Time SC2 Game1
Acquisition
Purchased from Already available


ve

Upgrades

FlyingLocustIcon
Flying Locusts

Allows locusts spawned by swarm hosts to fly. Flying locusts can use Swoop to land and attack units.

Automatically available in Legacy of the Void.

Acquisition
Purchased from

Infestation pit (HotS)

Already researched (LotV)
Hotkey L
Cost 200 Minerals Terran SC1 200 Gas Terran SC1 160Time SC2 Game1
ve

Heart of the Swarm

EnduringLocusts SC2-HotS Icon
Enduring Locusts

Increases the lifespan of locusts by 10 seconds (to 25 seconds). This upgrade was removed from HotS in the April 2015 update, as the locust's base lifespan was increased to 25 seconds. [5]

This upgrade is not present in Legacy of the Void.[6]

Acquisition
Purchased from Infestation pit
Hotkey L
Cost 200 Minerals Terran SC1 200 Gas Terran SC1 120Time SC2 Game1
ve

Heart of the Swarm Campaign

In the StarCraft II: Heart of the Swarm campaign, swarm hosts can be upgraded to produce locusts faster. The carrion strain can produce flying locusts.

Upgrades

SC2 RapidIncubation Icon
Rapid Incubation

Locusts spawn 20% faster.

Locust production inefficient. Will greatly benefit from redundancy removal. Sequences are complex, wasteful. Byproduct of wild, uncontrolled evolution. Simplification of sequences will allow swarm hosts to incubate full-grown locusts at rapid speeds.

Campaign Acquisition
ve
SC2 PressurizedGlands Icon
Pressurized Glands

Locusts can attack both ground and air units.

Swarm host defense reliant on locust organism. Locust secrets solvent fluids, projectiles towards enemy. Can mutate glands, increase pressure. Will allow projectile to reach incredible height. Attack both ground and aerial targets.

Campaign Acquisition
ve

Legacy of the Void

In Legacy of the Void, locusts can be spawned every 60 seconds. Spawning locusts is no longer auto-cast, and no longer requires the swarm host to be burrowed. Locusts are also able to fly, and must be ordered to land at a targeted area using "Swoop" in order to attack.

Co-op Missions

Locusts are available to Abathur in Co-op Missions. They can be spawned via his swarm hosts, and can be upgraded at the infestation pit. In addition, Abathur unlocks an upgrade that gives him and his ally the random chance to spawn locusts from the bodies of dead enemies at Level 13.

Upgrades

SC2 Abathur AC - LocustInjection
Locust Injection

Enemy units have a chance to spawn friendly Locusts upon death.

Campaign Acquisition
Unlock Reach Abathur level 13.
ve
SC2 PressurizedGlands Icon
Pressurized Glands

Locusts can attack both air and ground units.

Campaign Acquisition
Unlock Initially available
Acquisition
Purchased from Infestation pit
Hotkey P
Cost 200 Minerals Terran SC1 200 ZergVespene SC2 Game1 120Time SC2 Game1
ve

Portrait

Locust SC2 Head2

Variant locust portrait

A variant locust portrait is available to zerg players via Heart of the Swarm's leveling system. It is unlocked at level 11.

Development

Locusts used to be able to target air units.[7]

Flying Locusts had to be researched at the infestation pit in the beta version of Legacy of the Void. [8]

Heroes of the Storm

Heroes DevLog2

The following section contains information from Heroes of the Storm and is not canon to StarCraft continuity

Locusts appear in Heroes of the Storm, and are naturally spawned from the body of Abathur.[9]

Special Locust Strains

References

  1. 1.0 1.1 2014-12-04, Swarm Host Science. Blizzard Entertainment, accessed on 2014-12-06
  2. 2.0 2.1 Swarm Host, Blizzard Entertainment. Accessed on 2014-01-08
  3. 3.0 3.1 3.2 2015-09-18, NYCC 2015 – James Waugh’s StarCraft Field Manual Signing Schedule. Blizzplanet, accessed on 2015-09-23
  4. Blizzard Entertainment. 2015-04-07. Heart of the Swarm Balance Update -- April 9, 2015. Blizzard Entertainment. Accessed 2015-05-11.
  5. Blizzard Entertainment. 2015-04-07. Heart of the Swarm Balance Update -- April 9, 2015. Blizzard Entertainment. Accessed 2015-05-11.
  6. 2015-03-31, StarCraft II Legacy of the Void Beta Release Patch Notes. Blizzard Entertainment, accessed on 2015-04-03
  7. 2011-10-27, BlizzCon 2011: StarCraft II: Heart of the Swarm – Units and Abilities. Blizzplanet, accessed on 2011-11-06
  8. 2015-03-31, StarCraft II Legacy of the Void Beta Release Patch Notes. Blizzard Entertainment, accessed on 2015-04-03
  9. Blizzard Entertainment. Heroes of the Storm (Blizzard Entertainment) (in English). June 2, 2015