Underdark : roleplaying game supplement /
Heinsoo, Rob.
Collins, Andy,1971 August 2-
Renton, WA ; Newport, Gwent : Wizards of the Coast,
2010.
At head of title: Dungeons & dragons.
"For use with these 4th edition Dungeons & dragons core products: Player's handbook core rulebooks, Dungeon master's guide core rulebooks, Monster manual core rulebooks, D&D miniatures, D&D dungeon tiles"--p. [4] of cover.
Dungeons and dragons (Game)
Fantasy games