The Tal'darim stole a number of sentries from the Daelaam and reprogrammed them violently, replacing their shield generators with on-board targeting systems. However, their force field generators remained intact. The Daelaam came into usage of the havocs during the End War.[1]
The havoc lacks an innate attack like the sentry and energizer, being a purely supportive unit. It is able to use Force Field, and has the passive ability "Squad Sight," which boosts the range of units in a radius of 4 from the havoc. Its third ability is "Target Lock," which locks the havoc on a single target, causing it to take 30% more damage from the player's units. This makes the havoc a very effective supporter in frontline combat armies, but lacking in the more versatile and defensive abilities of the sentry and energizer. The havoc is also the only variant of sentry which isn't psionic.
Abilities
Force Field
Creates a wall of energy at target point, pushing nearby units away and making the terrain impassable. Massive units and the mothership's Vortex ability remove Force Fields.
Increases damage dealt to target enemy unit by 30%. Effect lasts as long as the Havoc remains locked onto the target. Can be set to autocast.
Usage
Hotkey
T
Range
6
Cooldown
3
Notes
Multiple havocs cannot use Target Lock on the same target multiple times. One havoc can use Target Lock on two enemies at the same time (secondary enemy targeted after cooldown).
Havocs can be constructed by Alarak in Co-op Missions. They are upgraded at the cybernetics core, and additional upgrades for them are unlocked at Level 9. Unique to Co-op, havocs act as detectors.
Abilities
Force Field
Creates a wall of energy at target point, pushing nearby units away and making the terrain impassable. Massive units and the mothership's Vortex ability remove Force Fields. Can store up to 3 charges
Increases damage dealt to target enemy unit by 15%. Effect lasts as long as the Havoc remains locked onto the target. Can be set to autocast.
Usage
Hotkey
T
Range
6
Cooldown
3
Notes
Multiple havocs cannot use Target Lock on the same target multiple times. One havoc can use Target Lock on two enemies at the same time (secondary enemy targeted after cooldown).
The following section contains information from a previous version of StarCraft II which is no longer valid.
Map editor files indicate the havoc may have been called the "monitor" earlier in development. Its Squad Sight and Target Lock abilities are tagged "observer" in the editor files; it is unknown if this was another name used for it at some point, or if the havoc's abilities were intended for the protoss observer, which does not appear in the campaign.
References
↑Blizzard Entertainment. StarCraft II: Legacy of the Void. (Activision Blizzard). PC. War Council interface (in English). 2015-11-10.
