T'rolbarahl were D'ivers, with "the gift of becoming many from one." They were described as huge two-legged, tailed reptilian monstrosities, with hanging oversized and overlong arms and enormous talons. They were "half again as tall as the Toblakai". Their tails were stunted and thick. They possessed broad-snouted jaws crowded with interlocking rows of dagger-long fangs. Above the jaws were "flaring cheekbones and brow-ridges protecting deep-set eyes that glistened like wet stones on a strand. A serrated crest bisected the flat, elongated skull, pale yellow above the dun green hide".