This article or section contains information derived from Co-op Missions, and should not be considered part of the official StarCraft storyline.
"Climb up there and place the mechanism on the ridge near its head. Yes, just so. And Herbert- please do take care not to alarm the beast. If it whips itself into a frenzy, we can't calm it down enough to asset control tonight."
Enthralled ultralisks were ultralisks of the Maguro Brood enslaved by the Cerberus Program during the rule of Arcturus Mengsk. They had their nervous systems replaced with various mechanical augmentations in order to make them susceptible to Terran Dominion control, including a mechanism near the ridge of the head. These beasts had a propensity to frenzy when improperly handled, and would take hours to calm down.
Enthralled ultralisks are part of the Dogs of War calldown for Arcturus Mengsk. When Mengsk uses the ability at 100 Imperial Mandate or above, it will deploy 5 ultralisks. These ultralisks are uncontrollable and will attack the nearest enemy target. They benefit from Dominion armor and weapon upgrades, and may have their damage increased by the Terrible Damage mastery.