Tlalusks are immense, irritable herbivores the size of mammoths who roam the frozen plains in small, fast herds. They are notoriously ill-tempered and grumpy.
Tlalusks are occasionally dometicated by frost giants, who may use the creatures as war mounts. The training is not easy, however, and there are plenty of feral tlalusks in frost giant lands.
Tlalusks are irritable, and vocal about it -- they open hostilities by issuing a focused cone of sound, a bellow, that stuns and deafens all in front of it. It then proceeds to gore and trample anything it can.