1) Forgotten Realms sourcebook 2) Greyhawk location
Found on
https://www.crosswordclues.com/clue/underdark
The Underdark is a fictional setting which has appeared in Dungeons & Dragons role-playing campaigns and Dungeons & Dragons-based fiction books, including the Legend of Drizzt series by R. A. Salvatore. It is described as a vast subterranean network of interconnected caverns and tunnels, stretching beneath entire continents and forming an underwor...
Found on
http://en.wikipedia.org/wiki/Underdark
No exact match found.
