They were described as about nine foot tall with a flat head, one central eye, long snout, long sinuous neck and a midnight black and hairy body with one front leg and two hind legs. Their blood was black.
In The Bonehunters
Shadowthrone sent Aptorian and Azalan demons to defend the Throne of Shadow on Drift Avalii. When Ahlrada Ahn's Tiste Edur war party reached the island to seize the Throne, they found the demons' bodies dead and bloated from previous battles.