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!

Strange things are afoot in the Moonsea. The factions have called all those willing and able to investigate strange occurrences in the region surrounding Phlan. Dark whispers and unseen terrors lurk in the misty shadows between this world and someplace much more sinister. Unveil the horrors before it is too late! Part one of Misty Fortunes and Absent Hearts.

The search for a missing paladin takes the PCs deep into the heart of a frontier torn apart by cult wars—and face to face with an ancient evil. The paladin Jaryd set out to find and destroy the Hand of Naarash. He was never heard from again. Now the PCs must retrace Jaryn’s steps across the harsh wilderness and determine what has become of the noble warrior. Pgs. 29-59

A Giant Ransom is a short adventure for four 11th-level characters. There are opportunities for diplomacy, stealth, and combat, based on the choices the PCs make, so any mix of classes is appropriate. The adventure can be set in any campaign world, in a frontier region near glacier-covered mountains. In the first episode, the PCs were employed by Duke Ambrinigan to exchange a ransom of 10,000 gp in gems for a golden lion that was taken by frost giants in a recent raid. While waiting for the giants to arrive at the designated meeting place, the PCs watched as the white dragon Whildenstrank attacked the giants and then flew off with the statue. Charged with returning the golden lion statue at all costs, the PCs move to investigate the site of the battle.

The ruined manor now known as Kobold Hall was once a minor lord's proud holding, a walled keep overlooking the old King's Road. That was years ago, and the lord's name and glories he earned are long forgotten. Today, the place is called Kobold Hall after the malicious humanoids that invest the place. Pgs. 210-219

A succubus with an unquenchable lust for power is turning the Cage into a ripping madhouse. And the Lady of Pain ain't pleased. . . . Something's foul in Sigil, berk. A mad slasher prowls the streets, leaving a trail of bloody clues in his wake. Leatherheads boldly court the Lady of Pain, longing for the sharp touch of her shadow. Even the silent dabus're acting barmy, a sure sign that the Lady herself is uneasy. Are these strange events tied to a madhouse full of spell-touched sods ready to slip the bonds of mortality? A curious body'd better step carefully. After all, the dead-book's full of fools who wished for power?or got in the way of another berk's wish. Harbinger House is a Planescape adventure for four to six characters of 4th to 7th levels. From Sigil to the Outlands and back again, the heroes must piece together a puzzle that could shake the Cage to its foundations. A dark secret of the multiverse wails to be discovered in the lunatic asylum called Harbinger House, and only the player characters can shape its power-for good or ill. TSR 2614

A nest of vampires has claimed a dark forest and the surrounding human towns as its domain. Some of the local residents revere the vampires and serve as daylight guardians and spies. However, most of the townsfolk live in a state of dread. Those townsfolk have finally scavenged enough valuables to hire a band of adventurers to destroy the nest. Pgs. 66-71

The frost giants of the Ice Mountains have long held to the belief that a great Jarl will one day step forward to unite the families as Konung (king). With the Ordning shattered, Jarl Ryndölg believes that if he can locate Hartkiller’s Horn, a legendary artifact among giant-kind, he could be the one. He may very well have found what he is looking for. A great clarion call has echoed across the Hartsvale for two days, and the giants are all marching north, has Ryndölg done just that? A Four-Hour Adventure for 5th-10th Level Characters This adventure consists of three Parts, as follows: Part 1. The adventure begins with the characters having already arrived in Stagwick (whether sent by their faction or by their own, individual search for adventure and wealth) and have been briefed before preparing for an important journey to the north Part 2. From Stagwick, the players discover their guide has been killed and must make their way through the deadly cold fingers of the Ice Spires alone—either by skill or luck. Part 3. Once at Ise Festing, the group discovers it’s been inhabited by a troupe of Shatterblood Ogres whom they must defeat to gain access to the redoubt’s observation deck.

Mykon Drift, genius inventor and entrepreneur, has disappeared on the eve of his greatest ever product launch, and nobody seems to know why or where he’s gone. Certain jaded onlookers might think this is for the best, for Drift is a disrupter in the truest sense, and the technomantic marvels he creates often wreak havoc on the guilds and economies of the Sword Coast. But titans of industry like Mykon Drift don’t just disappear for no reason, and his most loyal apprentice is willing to pay to find him. Unfortunately, that apprentice isn’t willing to pay very well, so what they get is the Grib-bits Detective Agency. "The Gribbits Detective Agency Part II" is a Dungeons & Dragons adventure for four 2nd-level characters. It is designed to follow on from "The Gribbits Detective Agency", and should be played in a single sitting.

Orcus, the Demon Prince of Undeath, craves the power of the Raven Queen and mastery of death's domain. The key to his ascension and the secret to his destruction lies buried in the heart of the Abyss. As heroes chase Orcus into the abyssal depths, evil opposed them at every turn, and each victory brings them closer to their final fate. Concluded the epic series of adventures and the entire story line begun in Keep on the Shadowfell.

A band of mercenaries -- the Stormcrow Company -- laired beneath the Tor, but no on has heard of them for a while. Their lair and treasure may be up for grabs.

At Restwell Keep, you've heard that fortune and glory await those bold enough to brave the dangers of the Chaos Scar, a valley carved ages ago by a fallen star. The same tales warn that this Chaos Scar draws wickedness to it. Perhaps you can help stem this tide... and gain treasure along the way. While the location is a different keep, this adventure is an homage to B2 Keep on the Borderlands(https://adventurelookup.com/adventures/b2-keep-on-the-borderlands)

In the village of Elventree, near the oppressive city of Hillsfar, a recent string of strange occurrences has the locals on edge. The factions have gathered here on the borders of the forest of Cormanthor to determine what’s happening. Are these the machinations of Hillsfar, or something more?

All ocean voyages are fraught with peril, yet a voyage to the infamous Isle of Dread might seem to some old salts to be a deliberate goading of the gods of the sea. Many of those who have attempted the voyage before managed to return to civilization often choose not to speak of the trials they experienced on that dangerous route, yet those whose lips can be loosened by a draught of grog whisper amazing stories... tales of pirates, sea monsters, terrifying storms, and perhaps most harrowing of all, of a strange and sinister land without land, a floating graveyard of dead ships mired in a sargasso the size of an island. This place has many names, but its most well-known may be it's most apt - Journey's End. "The Sea Wyvern's Wake" is the third chapter of the Savage Tide Adventure Path, a complete campaign consisting of 12 adventures appearing in Dungeon magazine. For additional aid in running this campaign, check out Dragon magazine's monthly "Savage Tidings" articles, a series that helps players and DMs prepare for and expand upon the campaign. Issue #350 of Dragon magazine features a regional guide to the seafaring environs the PCs can expect on the journey to the Isle of Dread. It’s time to bid farewell to the city of Sasserine as the PCs board the Sea Wyvern for a 3,000-mile voyage south into the uncharted waters of the Vohoun Ocean. Their destination: the Isle of Dread. Pgs. 16-48

Aleyd Burral, the Risen Hero of Phlan has sounded the call to battle! Intent on retaking her home of Phlan, Aleyd has amassed a surprising amount of support from the citizenry of Phlan, including that of the High Blade himself. But as lofty as her goals might be, the honor-bound warrior seems willing to sacrifice much in her quest—including everything she once stood for.

The Shrine of the Axes has been restored and Raggnar Redtooth, who previously conspired with dragon cultists, is trying to restore his reputation in Parnast by sponsoring a feast. There is just one thing he needs, meat for his feast. Game is supposed to be plentiful in the Weathercote Wood, but the townsfolk are all busy with their own work, and the minions of Bad Fruul are still out there causing trouble. What can go wrong on a simple hunt?

Bugbear Fight Pit is a mini-adventure with a single main encounter that follow the Bugbear Jeeshank tricking the players into a trap with the challenge of single combat to stop his activities. If the players fall for it, they will be faced with a large number of ranged attacks, and additional clever tactics and use of the terrain. Pgs. 15-17

The fabled sword of Selfaril is told to bestow wisdom and power upon whomever wields it, so naturally its discovery has caused quite a stir in Mulmaster. All of this is complicated when a masked benefactor claims to not only know the truth about the blade, but also how it can be used to benefit the oppressed people of Mulmaster. Can it truly change Mulmaster for the better?

The Temple of Draxion is an adventure with 2-3 encounters that uses clever tactics, trickery, and good defensive positions to make low-level monsters challenging. The defenders in the encounter try to deceive the PCs; groups willing to accept anything the DM says at face value will horribly misjudge the actual level of danger they are in. The adventure is set in a partially-collapsed dungeon that was once a temple to Erythnul, but is now the headquarters of a pair of aspiring bandits, and their kobold employees. Pgs. 12-15

Caravans are having a difficult time getting through to Parnast via the Black Road. Organized attacks by orcs and other monstrous humanoids working in concert with one another have folks baffled. Little do they know that an unusually intelligent hill giant, going by the name of Bad Fruul is to blame. SEER has sent her emissary Hsing, to task your group to accompany a caravan with a very special cargo destined for the Shrine of Axes in Parnast, and to figure out who is responsible. A Two Hour Adventure for 1st-4th Level Characters