Seven Sisters (Forgotten Realms)
The Seven Sisters—fictional characters of the "Forgotten Realms" campaign setting of the "Dungeons & Dragons" Role Playing Game. The sisters are epic level characters (characters possessing nearly super-human levels of skill and power) of differing abilities, most of which involve some form of spellcasting and use of magic. Created by Ed Greenwood, they have been featured in multiple novels, games, and officially created scenarios by an equally large number of authors/game-designers.
Undermountain
Undermountain was created by Ed Greenwood in 1975. It was the first dungeon for his fledgling Forgotten Realms campaign setting, and he used the Undermountain in both his "Dungeons & Dragons" and "Advanced Dungeons & Dragons" games.