Delve deeper than you ever thought conceivable in this adventure for the world’s greatest roleplaying game.
Hundreds of years ago, long before Waterdeep had been built, Halaster Blackcloak carved a vast dungeon beneath Mount Waterdeep and stocked it with all manner of creatures from across the planes. Through the years Halaster has gone relatively insane and the dungeon he carved, now dubbed Undermountain, is a labyrinthine death trap for those bold enough to venture within. Precious few have returned from Halaster’s home, and incessantly they’re not who they were when they started out. One thing is certain then again. Wealth impossible exists within the halls of Undermountain.
In the city of Waterdeep rests a tavern called the Yawning Portal, named after the gaping pit in its common room. At the bottom of this crumbling shaft is a labyrinthine dungeon shunned by all but the most daring adventurers. Referred to as Undermountain, this dungeon is the domain of the mad wizard Halaster Blackcloak. Long has the Mad Mage dwelt in these forlorn depths, seeding his lair with monsters, traps, and mysteries-to what end is a constant source of speculation and concern.
This adventure picks up where Waterdeep: Dragon Heist leaves off, taking characters of 5th level or higher the entire way to 20th level must they explore the entirety of Halaster`s home. Twenty-three levels of Undermountain are detailed herein, at the side of the subterranean refuge of Skullport. Treasures and secrets abound, but tread with care!