Kobolds in the caves!!
The Kobolds are cave-dwelling creatures obsessed with lighting up their dark tunnels and exploring the deepest corner of their caves. They are almost never seen above surface. On the rare occassion there has been a sighting they usually almost immediately hide back into their cave. As creatures who are permanently in the dark they've developed bat-like features to make their way around. Despite their appearance they are not aggressive creatures and would much rather run and hide, than attack anyone. If you're careful enough you can approach and sometimes even communicate and even trade with them. Their expeditions and expansion throughout the mountain makes sure they usually know where all the best resources are.
