Dwarves

Tundra Dwarves
Tundra Dwarves inhabit the bleak, northernmost reaches of the world and are known for being able to survive and thrive in environments which would be too cold for most. Like their Dwarven cousins, they spend a lot of their time underground, but this is mainly for shelter rather than wanting to mine.

Gray Dwarves
Duergar, also known as gray dwarves, are a subterranean race. They are close kin to dwarves, but with a diabolic taint to their blood. They now carve out their existence in the Underdark, often near volcanoes.