A series of RPG products which details and expands on the largest dungeon in Forgotten Realms. A dungeon so vast and deep that it is rumored many an adventurer has become lost and now lives beneath Mount Waterdeep. Home to Halaster Blackcloak and his long insane apprentices. Undermountain offers anything the scheming DM could possibly imagine.
Undermountain was originally designed to be a Dungeon Master’s playground, leaving much of the dungeon undetailed allowing DM’s to insert whatever nasty creations their imaginations could dream up.