The Savage Frontier
There are many factions in the Underdark. This section covers those who have no larger allegiance to a city like Gracklstugh or Menzoberranzan.
Society of Brilliance
This society contains select non-violent sage outcasts who devote their intellect toward saving the Underdark, many times, from itself. Convinced that demons are influencing the faerzress, they study it in hopes to stop whatever evil force is trying to overtake the Underdark.