Ultralisks deal splash damage which makes them effective against groups of low HP units, such as terran infantry, zerglings and zealots. They are vulnerable to immortals, siege tanks, tempests, void rays, banshees, cyclones that hit and run on ultralisks, brood lords, and the Steady Targeting ability of ghosts. They are immune to stun and mind control effects. The ultralisk is the only zerg unit that can withstand a nuclear missile strike.
Ultralisks are fast and deal high damage to armored units. Captive ultralisks are featured as a number of destructible doodads. "Piercing the Shroud" has a captive ultralisk: when destroyed it releases broodlings. A similar unselectable ultralisk is found in a hidden place in "Ghost of a Chance." Though it maintains its frenzied attribute it can still be captured using the hive mind emulator.
It is also significantly less powerful offensively compared to the multiplayer version, doing only 25 damage per attack against its main target and 5 damage to secondary targets.
Upgrades and Abilities
Ultralisk burrows and charges towards target point. On eruption, knocks enemies back and stuns them for 2 seconds. Can be autocast.
Ultralisk, large muscular surface area. Able to vibrate billions of subdermal muscles, break apart terrain, burrow into ground. Possible to mutate muscular system, amplify vibration resonance. Allow ultralisk to dive into ground, charge enemy. Exploit misconceptions of solid terrain.
Ultralisk recovers 40% of damage inflicted to enemies.
Kaiser blades extremely effective. Monofilament edge tears through materials. Flesh, bone, armor. Significant carnage. Can utilize, turn into asset. Can alter carapace surface. Allow assimilation of usable matter from fluids, wreckage. Will become fuel for immediate tissue regeneration.
Significant alteration, monarch blades. Tissues of kaiser blades reconfigured on microscopic scale. New structure prevents momentum loss. Blades cleave multiple enemies with same strength as striking single foe.
The ultralisk and ultralisk cavern are exclusive to Kerrigan in Co-op Missions. Additional upgrades for the ultralisk become available when Kerrigan reaches Level 13. Kerrigan's ultralisks automatically upgrade into Torrasque when she reaches Level 14.