Things Torendra knows
The pre-collapse nations of the Plateau were Matriarchies. Their destruction was the fault of the male gods.
They were arranged as a mutually supportive set of city states.
It takes years to build up trust, and it only takes suspicion, not proof, to destroy it.
These city states represented the highest levels of philosophical, artistic, cultural and ascetic achievement by anybody anywhere. Ever.
All of the artisans, engineers, architects and other builders were especially wanted by the Hurgilin. This is perhaps why the Mura abandoned their written language.
You can keep vomiting long after you think you're finished.
Before the coming of the Empire and the adoption of the name ‘Hurgilin’ (muri compound word – evil/superior warrior) each of the tribes had it’s own name for the Bugbears.
Some Hurgilin are trophy hunters who collect skulls.
Some Hurgilin can use magic and are adept at devil summoning. These tend not be part of a particular tribe, but operate alone most of the time (but not exclusively).