Naga brutes (also known as behemoths) are huge, mutated naga used as heavy fighters and even as siege weapons by the naga army. Some have rank, while some act more like mere beasts. No explanation for their origins have been given.
It is known that naga brutes have the ability to speak, such as many Sashj'tar naga brutes in Azuregale Bay in Suramar. One, in particular, is Har'kess the Insatiable.