The aggressive quil crawl upon a multitude of legs, sliding across the ground in an undulating fashion. A thick coat of bony spikes covers their broad backs, laying flat during movement, but when threatened, they rise on end. They have a dozen insect-like legs and an armored head that can retract beneath the creature's torso if needed. Their head is bone, with no skin, and their jaws open and close like a vise, able to tear through flesh, clothing, furs, and even armor. Their finger-like claws are able to grasp things, allowing them to eat them all the faster.