A master criminal has been making her way across the Moonsea, stealing priceless treasures at every stop. It's up to you to trace her steps, find her allies, and stop her before she can claim her final prize. A Two to Four-Hour Adventure for Tier 2 Characters. Optimized for APL 8.

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. Known 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 all the way to 20th level should they explore the entirety of Halaster’s home. Twenty-three levels of Undermountain are detailed herein, along with the subterranean refuge of Skullport. Treasures and secrets abound, but tread with care!

Your search for Volo’s key in Skullport has you playing a dangerous game between The Xanathar Guild, Bregan D’aerthe, and the Zhentarim. In the Port of Shadow, how do you know who you can trust when lives are on the line? Part Two of the Skullport Shakedown trilogy.