As a xenomorph hive grows in size, on occasion, a Warrior will mutate into a unique type of its own. Highly adaptable, these creatures are often mistaken for a standard Warrior until it is too late for their enemies. Some of them are able to spray acid at close range onto multiple enemies at once, others can camouflage their exoskeleton to blend into their surroundings to leap upon their foes, and some of them are even able to heal the most grievous of wounds almost instantly.
Classified as Evolved Warriors, company scientists believe they are an evolutional dead-end and once their metamorphosis has finished, it will change no more after that. It is theorized that their evolution is due to an immediate need that the hive requires, but not as a long term creation. Whatever the reasoning is behind these monsters, they should be engaged with extreme caution, as each one is different and there is no way to determine what capabilities it has until it has displayed them.