The greatest dungeon of all time
In the city of Waterdeep there is a tavern, the Gaping Portal, named after the large pit in its common room. A labyrinthine dungeon, where only the most daring dare to venture, extends to the bottom of this crumbling well. Known as Undermountain, this dungeon is the domain of the mad magician Halaster Blackcloak. The Mad Mage has lived in these desolate depths for a long time, populating his lair with monsters, traps and mysteries. What purpose ? This question is a permanent source of speculation and concern.
This adventure is the sequel to Waterdeep: Flight of Dragons and allows characters of level 5 or higher to progress up to level 20 if they explore all of Halaster's lair. Twenty-three layers of Undermountain as well as the underground refuge of Skullport are described in detail. Treasures and secrets abound, but watch where you step!