Varkolyn

After dwarven civilization collapsed, their oldest enemies, the Varkolyn, crept from the shadows, claiming the ruined keeps and palaces as their dominion: the Kingdom of the Dark. For centuries afterward, the Varkolyn ruled over the dwarven ruins, making war on their neighbors and preying on anyone who strayed within their territories. Ultimately, they failed to grow their civilization: The First Great Varkolyn Empire was also the last.

For all their pretense of civilization, for all their glorious plans, the Varkolyn lack the expertise to carry them out. Those on the fringes of Varkolyn society have a tendency to backslide into barbarism, splitting into feral clans and even going to war with their more advanced cousins. All that still unites them is their utter contempt for other races.

Source

 * Official Torchlight 2 site