Underground dwellers, whom are sightless, but have sonar and heat sensing capabilities.

Their heads feature a polished bone that encases most of their head. This is not their skull, but rather a separate growth that can break away and regrow. This is as durable as hardened steel.

They have sharp, toothless beaks with jaws strong enough to bite through stone.

They are wingless, and have a strong, stubby tail. This tail has a harpoon-like tip, with sharp barbs. This can be used for defence, via swinging it around, but is often used to help anchor themselves.

Their claws are broad and dull for digging through dirt, with diamond-like tips for scratching through stone.

Heavy armour plating covers their back.

They are bulky in form, with powerful fore and hind leg muscles.

Their penises are equine in look, except have soft spines around their flare. They have a wide knot at the bottom. They are not sheathed, and do not have external balls.

Their sense of smell is strong enough to differentiate between types of ores, and find ores deep underground.

They are predatory.

They live almost exclusively underground.

They live in packs, with a single dominant male who is larger than the others, whom is allowed to mate with the females. The females and males will live in the same chamber with separate nests.

When a new female is captured, all males except the alpha will mate with them, but will not seed them, instead pulling out. This is to prepare her for the alpha whom will then breed her and add her to his harem.

They are highly territorial, and will kill invaders or force them to join their ranks at the bottom.