Underdark

The Underdark was the vast network of underground caverns and tunnels underneath the surface of Tolria. It was home to a host of evil beings driven deep into the caverns at the turn of the second and third ages. The absence of light results in darkness. So, what results from the absence of Good? The Underdark is a place with very little of either. An entrance to the Underdark was found beneath the dwarven undercity of Stormpeak.