Mountain dragons were wyrms found in the colder climates of the Labuga'al mountains. They ran in packs of twenty or more in the wild, but were also domesticated and kept in smaller groups by the Great House of Labuga'al.
Mountain dragons were protected by leathery, fireproof hides, marked with accents of shaggy fur. To blend in with the dark stone of the mountain, they came in mottled shades of gray or black. They had the legs, torso, and facial features of a wolf, but their necks and tails were slightly longer and serpentine.
They produced an oil-like venom from their fangs. The dragons only produced a small amount of venom at a time, and would use it to poison small prey or breathe a flash of intense but short-lived fire. Once the noble family of Labuga'al had determined a method to milk usable dragon oil from domesticated wyrm, the oil was distributed as a valuable fuel across Adaven.
Mountain dragons hunted in packs and fed mainly on mountain goats or rabbits.
Though unable to fly, they possessed narrow wings at their shoulders, which allowed them to glide for short distances. Their wings resembled the fins of a flying fish, but could not rotate more than 45 degrees outwards from the body, likening them more to the hood of a cobra. When not in use, the wings folded close to the torso and were almost completely hidden by fur.
Adult dragons stood a little over two feet high at the withers, and were crowned with two jet black horns swept back from the head. The horns were of a sturdy density, and were used by adolescent males to compete for mates or for leadership of the pack.
When agitated or displaying dominance, mountain dragons would hiss, expose their fangs, and spread their wings to capacity. They could also spit small bursts of fire, though the range of their breath was limited to about a foot, and was mostly only used for intimidation.
Dragons would give birth to litters of five to seven live young. Their family groups remained bonded closely with relatives of multiple generations, and adolescents were equally likely to either depart or remain in their parents' pack. Pairs of dragons would remain mated for life.
As the top predators of their region, population control was mostly attributed to shortages of food or the aggression of dominant males.