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!

Exploring Baba Yaga's Dancing Hut. This adventure design to test high level PCs can be used in a variety of scenarios as the DM sees fit.

From the magazine: "A rotting ship holds the secrets of all the universe, but its crew wants you only for the 'fuel' you carry." This scenario is useful for launching players into a Spelljammer campaign. The players are tasked with investigating a derelict ship that fell from the sky. The ship is captained by a spectre and crewed by a host of undead enemies. Clearing the ship gives the players the possibility of a Spelljammer ship as well as access to several wheel-lock pistols and ammunition (the biggest treasure from the adventure). The adventure takes place in the Forgotten Realms setting, though it may be easily altered to fit any other campaign world. Module LC1 Gateway to Ravens Bluff, The Living City, would be helpful, as the city of Ravens Bluff is suggested as the PCs' starting point for this adventure. Any other city can be substituted without difficulty. Pgs. 29-37

A one-shot adventure of dark fantasy, tragedy, and horror... - 4-6 hour adventure for 3rd - 5th level characters. - 24 pages of an elegant, easy to read PDF. - 4 custom handouts that pair with the adventure. - 2 custom monsters. - 10+ trinkets and magic items for handing out to your players. - 6 gorgeous free battle maps that can be found here: https://www.dmsguild.com/product/434359/Map-Pack-01--The-Sorrows-of-Southsward-Keep

The denizens of the Old City have made some unusual sightings in the festering refuse pits on the outskirts of the city, and while such reports are seldom taken terribly seriously, the mysterious disappearance of a beloved figure in the poor part of Port Nyanzaru has folks on edge. Can you get to the bottom of this? Part One of The Rot from Within Trilogy.

A 12-page adventure for OSE CONTAIN THE UNDEAD! Between jagged peaks hides a small dagger shaped temple. Inside live the followers of Polsin, half-elf god of vengeance. They spend their days plotting and obsessing over those that wronged them, but at night they tend their great cemetery. A few weeks ago a new adept stole the cemetery key and opened Polsin's tomb to steal his dagger. He died in the attempt, but now the graveyard's denizens have risen from the dead and treathen the outside world. Take the dagger! Face the tomb's defences and retrieve the lost dagger of Polsin, a legendary weapon capable of defeating any kind of undead and bring peace to the cemetery. Polsin's Dagger is a low level Old School Essentials adventure for a party of 1-4 players. Perfect for a one shot or a random encounter in an hex crawl.

"The creatures are just too intelligent, too crafty, and too strategy-minded to "rampage." Rampaging brings the wrath of oath-bound knights, powerful mages, and divinely-protected priests. Why would a dragon want such attention, unless it had some special secret, or unless it was insane? Or both. The northern reaches of the Derideth Swamp were once plagued by a rampaging dragon. This black dragon, named Storamere, took a mad glee in attacking human villages, wiping out orc camps, driving off the lizardfolk, and decimating farmland. He met his untimely end, though, in an ambush devised by the monks of the Order of St. Chausle. Storamere died with a curse upon his draconic tongue: "you could not have defeated me in my lair," he told his slayers. "I am forever invincible in my lair." Now Storamere is back, with a horde of his misshapen half-dragon offspring, to have his vengeance. All that remains of the once-heroic monks are two old men driven mad by their last encounter with the black dragon, so it falls to a band of adventurers to again defeat the mighty dragon -- this time in his palace, where the boastful Storamere claims he is at his strongest." Includes maps and damage rules for navigating Storamere's lair, a semi-solid palace made of a dangerous, corrosive liquid five feet thick and located on the ethereal plane. Most of the monsters in the lair have the Half-Dragon template applied. Published by Atlas Games

Originally designed as a convention module, this adventure sends the heroes into the underdark to do battle against the mysterious denizens of the deep! A drow housemistress commissions the characters to acquire a mysterious weapon known to be in the hands of her dark elf enemies. Locating, identifying, and acquiring the magical weapon leads the heroes on a great trek across the underdeep, where they must battle svirfneblin, a powerful lich, and enemy drow. This adventure us specifically designed for play by drow characters, but can be used with any adventuring party. Pregenerated drow characters are included.

Laveth, Lolth's half drow daughter, is plotting to seize power from her chaotic evil mother.

Hushed Hills is an adventure location set in a haunted town nestled in hilly woodlands. It doubles as a toolbox with encounters and NPCs to support DMs in running a gothic horror adventure. You can use it in three ways: 1. Run the Hushed Hills as a Tier 1 adventure that takes one, two, or three 5-hour sessions (based on the starting quest you select). 2. Select the best encounters and NPCs to add to your game. 3. Use the presented content as fuel to inspire your ideas. This toolbox is packed with assets and consists of: • 50 encounterswith 4 quests to tie them into an adventure. • 21 NPC outlines (including eldritch chimeras), • 3 multi-phased boss battle against the Godless Chimeras. Assets are grouped into 3 regions, including Crestfall Abbey, Town of Kletva, and Mirage Forest. Each region has a high-resolution map and each NPC a portrait. Published by: Immersive Adventuring

Ages of Buried Evil The Bonegarden is a small nation ruled by the dead, a circular cemetery 1 mile in diameter, surrounded by a magical containment field that keeps its denizens from spilling into the innocent world beyond. Within the gate lies one of the true blights of the Domain of Hawkmoon, an immense graveyard that serves as the prison for the doomed spirits of thousands of history's most awful criminals. Those inside are determined to escape, and one of them may have found a way... An Endless Forum of Adventure The cemetery is a self-contained battlefield that abounds with undead of types the heroes have never seen, each with its own special plan for escaping its eternal confinement. The Bonegarden contains dozens of new spells, feats, monsters, and magic items. All the action takes place inside a mile-wide arena where the dead are the majority and the living are hunted like wild game. The heroes have come to the cemetery in search of adventure. The only question is... can they get out?

The Tale of The Haunted Ravine is a Hex Crawl Adventure of Exploration that can be used for any game system but was designed for use with D&D 5e. A Hex crawl map and random roll tables are used to create surprising encounters and mysteries for your players to interact with. Wild necrotic magic, magical mutations, undead, lost souls, and demons all cloaked in a fog fog-choked landscape; forsaken by the gods and scarred by the battle fought here long ago. Will your adventurers survive and escape the Haunted Ravine? Or will they join the legions of cursed souls imprisoned in this corrupted land?

The Shades of Bodach Ridge Whitepeak has a dark history of black magic originating with the evil witch Skruul the Reaper. The dark rituals she conducted seemed sure to plague the region, until a plucky group of adventurers thwarted her plans sending her into a state of perpetual fractured undeath. Now souls scatter from her old haunt on Bodach Ridge. What could have set these souls free?

The legendary city of Freeport is a seedy port town where former pirates settle down to become "businessmen" while street gangs fight over the slave trade. In the deepest warrens of this already dangerous place, mad cultists worship unspeakable gods - and sometimes these sinister deeds bubble to the surface. There's a dark shadow over Freeport today, as yet another innocent child has gone missing. The trail leads to the old Cresh Manor, boarded up but not forgotten. The city needs heroes to find these missing children. But are the heroes brave enough to conquer the dark shadows of Freeport?

No treasures here just lying around to be taken. This tomb's riches fight back! Never mind the guardians. Watch the loot! A new tomb has recently opened for business in your area! The wealth of a wizard's lifetime can be yours! Defeat his traps! Slay his guardians! Zathis the Insightful took a century to collect these marvelous treasures. Now they can be yours in a matter of hours! Pgs. 10-25

For hundreds of years, Aknar Ratalla's tomb remained undisturbed, the Black Blade safely hidden within its vaults. Can a band of adventurers use the tomb's guardians and traps to keep it that way? Long ago, Aknar Ratella brought pain and desolation down upon the land. His reign of ruin was finally ended by an unlikely alliance of the forces of law: a band of devils and devas slew the warlord but were unable to destroy his dangerous weapons and relics. They chose instead to hide these potent artifacts of evil in a remote tomb, selecting a devil and a deva to stand guard over the tomb for the rest of time. For many centuries, the tomb stood unspoiled... but now, a new player has entered the scene. After infiltrating the tomb themselves, a band of adventurers must become its guardians and use its denizens and traps to prevent a monstrous gnoll chieftain from claiming the deadly artifacts hidden within for his own nefarious glory. Pgs. 58-80

Alphatia, the most ancient empire, land of the arcane and obscure secrets. It has grown for centuries and its might now overshadows the cauldron of civilization. Some say the Alphatians come from elsewhere, but no one knows for sure. Beyond the scope of mortals broods an evil mastermind, still in darkness. Once a betrayed emperor of ancient Alphatia, now an entity of the Sphere of Entropy, he seeks revenge on the greatest empire and on the race of man. His plots brought a deathly fog on all of Norworld. Perhaps it will extend to the southern nations. The matter is grave, so much that lords of the spheres have now to show their might. For them, it is time for mortals to intervene. Man defends his cause for him to earn divine favor. A great armada has been raised and able commanders must be found. Prove your worth, and the eternal portals of the spheres may open for you. TSR 9159

Long ago, when the Dragonborn Empire of Arkhosia thrived, the flying citadel Ustraternes was undone by tiefling magic. Now, a dragonborn zealot with dreams of renewing the lost glory of his ancestors explores the ruins—and unleashes a plague of rampaging drakes on the terrified locals. The story offers PC's the chance to tame a Warwing Drake, disperse a mob, parley with undead, and battle within an alpine meadow that defies gravity.

Chaos reigns outside Roslof Keep, and the spread of the violet corruption runs deep within Mithelvarn's Dungeon. Now, the Company of the Ivory Scimitar must not only face the challenges of the Roslof delve, but will also find the dangers of the Kelmalin Wildlands must be overcome as well if they are ever to get to the bottom of the deadly plague that ravages the land. Time is running out, and only those brave enough will be able to face the horrors of the Glade of the Burning Dead and the dark recesses of The Hill. This adventure is formatted to both 1E & 5E gaming rules. Also available in PDF.

In “Rescue at Rivenroar,” the player characters must brave the depths of ancient catacombs in search of prisoners taken from the town of Brindol in a midnight raid. The hobgoblins, bandits that style themselves after an invading horde from long ago, have taken refuge in a dungeon under a ruined mountain fortress, and the PCs must clear them out to find the captive townsfolk and the treasures taken from Brindol. “Rescue at Rivenroar” also marks the first step in a great journey - the Scales of War Adventure Path, which spans 30 levels and put the PCs at the crux of events that shapes the world for centuries to come. While the scope of this adventure isn’t as grand, it represents the seed from which an epic tale will surely grow. Pgs. 4-45