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Carnifexes excel at thunderous charges, where their immense bulk is used to crush or smash through any opponent or obstacle. They are not as swift as other Tyranid creatures but their brute force more than makes up for this. A Carnifex's stampede takes time to build force as their incredible alien musculature strains to propel it forward. As it builds momentum and reaches top speed, the ground shakes with each stride of the monster and foes are scattered or trampled before it, only fortress walls or [[Super Heavy Tank]]s have any chance of surviving the ferocious impact. The best way to survive a ¹ Most Carnifex's charge is kills registered come from high energy attacks—lascannon, plasma and melta weapon strikes to be elsewherecritical locations. Carnifexes can shrug off other small arms fire and even bolt gun hits with minimal loss of function.¹⁴

Carnifexes are not very intelligent and in fact have little self-awareness. They will revert to unthinking rampages of destruction if not constantly supervised and guided by the [[Hive Mind]].¹All Carnifex species seem well able to adapt to extremesof environments from arctic cold to desert heat.⁴

The [[Imperium]]'s first recorded encounters with the Carnifex was in the battles against [[Hive Fleet]] [[Behemoth]] that lead up to the [[Battle for Macragge]]. As the Imperium tried to stop the Tyranids in space, Carnifexes were at the head of every boarding action. sup>1</sup> The strain of Carnifexes encountered became known as "Screamer Killers" because of their terrible ululating shriek , caused by rasping plates in their esophagus that accompanied their ability were used to discharge balls energize a form of [[Biobio-plasma]]in their gut in to shoot, generated within and in some instances Screamer Killers were reported using an electrical field around their bodies and vomited forth as blinding balls of energyclaws to build up an incandescent bio-plasma ball before launching it at a target over longer ranges.¹⁴ The Carnifex genus actually comprises many species displaying a wide variety of symbiotic weaponry such as the [[Heavy Venom Cannon]], [[Stranglethorn Cannon]], and [[Deathspitter]]s.²