Preliminary tests on the formidable carapace of the Ultralisk hinted at the bonding of exotic substances. Further research proved that the diamond-shaped, chitinous scales of the creature were combined with foreign compounds and organic tissue multiple times, resulting in very light plates with an unmatched level of hardness.
are terrifying to behold, for one swipe is all it takes to bisect walls, neosteel plating, or more exotic materials. The density, bevel, and edges of these organic weapons are honed at the genetic level, and the Swarm has recently found a way to fit four of them on a single Ultralisk.
The genetic code of the hapless Brontoliths has been dissected, rebuilt and repurposed multiple times. Each phase of the process has served to eliminate less desirable traits, as well as augment the creature’s ability to withstand severe punishment. As a finishing touch to the Ultralisk, a masterpiece of DNA manipulation, the Swarm added a gene with the sole purpose of growing heavily armored copies of the beast’s primary organs in random locations of its body.
The first Ultralisks encountered on the field seemed to suffer balance issues, and were easily toppled by artillery fire or loss of limbs. Recent reports of sorties with “unstoppable” Ultralisks have revealed substantial additions to their internal structures: a complex sensory system, an auxiliary nervous system, and specialized muscle fibers that expand or contract in reaction to stimuli. Though these evolutions hint at why a charging Ultralisk can maintain speed with its hind legs severed by a 180mm Crucio shell, they offer very little in the way of new solutions to the Swarm’s deadly siegebreaker.
Brontoliths were born to endure. With no natural weapons other than sheer size and strength, they mostly relied on their armored skin as protection from predators. Open wounds were a common denominator throughout their existence, and viruses, bacteria, and more exotic lifeforms often made their way into the Brontoliths’ bloodstreams. None of these harmful organisms managed to cause any damage, however. The Brontolith’s immune cells latched on to anything foreign and either destroyed or assimilated it. This trait was further enhanced by the Swarm, allowing Ultralisks to thrive in the most toxic or deadly environments the galaxy has to offer.