Black demons originate on Infernus, where they were called Alyaroth, as the other demons seen in Gielinor do. They are part of the Avernic race, which were tribal and primitive, and slaves to whoever was ruling Infernus at the time. At the time of Palkeera's memory of the realm, they were enslaved by the cannibalistic Chthonians, who were unable to consume the Avernics for some reason. Among the Avernic demons, the Tsutsaroth were the dominant tribe, ruling over the Alyaroth and Byzroth in a brutal manner.