When one of the Lords of Waterdeep asks you to root out a threat to the city, you respond to the call. Prepare for a foray into Undermountain. Part One of the Vampire Hunt trilogy.

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!

"The Hive" is a spawn of Arbeyach lair, also featuring giant termites and termite swarms, for five 6th-level characters. This adventure can be finished in one session. Several mounds in the Forsaken Hills are the dens of voracious termites that have added flesh to their diet to supplement dwindling wood supplies. At night, swarms of termites hunt and devour prey. They swarm over victims in wooden carts and wagons, and bring the dismantled wood back to their mounds. Three spawn of Arbeyach, searching for a location to summon Ia'Affrat, Arbeyach's herald, discovered a mound filled with particularity nasty termites and used their vermin empathy to gain acceptance. They dug out a cavern beneath the mound, and now use the termites to protect themselves and gather food while they complete a difficult ritual involving dozens of sacrifices. The final sacrifice is prepared and the spawn are finishing their ritual when the party arrives.

Vaylek the reclusive hydromancer did not often leave his seaside tower. Now he is missing. What strange and magical secrets lie within? What deadly perils and grotesque creatures might call that tower home? The mysteries of his tower await the brave and resourceful! This 5e ocean-themed adventure is intended for player levels 1-3 and contains: 6 levels of maps and exploration A floor filled with aquariums containing new and wonderous sea creatures A secret lab 6 new monsters--including Frankenlobster, Saltwater ooze, Sea gobblers, and Sharkdogs! Wandering monster tables and descriptions of what the monsters are doing New magic items An overland map An optional adventure setting

The heroes arrive at the eponymous Keep on the Borderlands, a fortress on the edge of civilization built to stave off the chaos and evil of the wilderness. Using it as a home base, a party can make forays into the surrounding wilderness, encountering monster and marauder alike. The centerpiece of the adventure is certainly the CAVES OF CHAOS, a network of tunnels and caverns found in the walls of a nearby but isolated ravine. It is here that hordes of evil humanoids have made their home. Through combat and negotiation, the players can try to explore and map out these caves, perhaps with the aim of accumulating valuable treasure or even cleansing the land of evil creatures. However, even the Caves are not all they seem. Beyond the goblins and kobolds lurk dark horrors: cults dedicated to fiendish chaos and a Minotaur's enchanted labyrinth await the unprepared adventurer. But for the hero who is brave, clever, and fortunate in equal and sufficient measure, great treasures and glory await in the Caves of Chaos that lie beyond the Keep on the Borderlands! TSR 9034

A 1st-level dungeon crawl heavy on exploration, factions, and sorcerous wonder for Shadowdark RPG! Go below the dripping ruins of Bittermold Keep to hunt for legendary treasures and face off against three competing factions that want to claim the Hideous Halls: the degenerate Bittermold family, the wild halfling Howlers, and the disgruntled mutant catfish. The characters might even encounter the abominable god-ooze, Mugdulblub! Winner of "The Best" rating from tenfootpole.org! View the adventure walkthrough video here: https://www.youtube.com/watch?v=mVJ-t7qMjPo This adventure is part of Cursed Scroll Zine 1: Diablerie! Inside the zine, you'll find cursed knights channeling demonic power, mist-addled forests where witches and warlocks stalk the trees, and crumbling castles housing ancient, eldritch creatures. Shadowdark RPG is what classic, old-school fantasy gaming would look like after being redesigned with 50 years of innovation. It's the world's greatest roleplaying game in a whole new light! Learn more and download the free rules here: https://www.thearcanelibrary.com/pages/shadowdark

Trouble in Paradise The Ruins of Azlant Adventure Path begins with the adventurers standing on the deck of a ship ready to make landfall at their new home. However, dread settles in as they notice that the colony is empty and abandoned. Tasked with uncovering the whereabouts of the prior group of colonists, the adventurers go ashore and explore the deserted settlement. Uncovering strange evidence leads the adventurers across the island, where they encounter two survivors who can give them clues as to the fate of the rest of the first wave of settlers. Can the adventurers survive long enough to discover what truly befell the fledgling colony?

The duchy of Velen is a bastion of law and order in an otherwise untamed land. Its ruler, Duke Calchais, holds his citizens and visitors to his city to a high standard of conduct. When Velen's harbormaster is murdered, the duke enlists the aid of adventurers to see that justice is served. Was the harbormaster a victim of larceny gone awry, or is something more sinister afoot in Velen? Murder in Velen is a 4-hour standalone adventure set in and around the port city of Velen, which is located in the peninsula nation of the same name in southwestern Faerûn. Velen is designed for a party of five 10th-level player characters, but it can easily be scaled by adding or removing creatures.

You have travelled to the legendarily festive town of Hamlet Court for the world famous Midwinter festival. You’re not in town long before you discover that the previous night, the annual Villager vs. Kobold snowball fight turned violent, putting a dampener on the festive mood. Madam Mayor looks solemn as she asks you to investigate exactly what has turned the long peaceful Snowbolds violent. She suggests you head to their Snow Cavern and fix the issue before it ruins Midwinter

A Halloween themed adventure for characters levels 3rd to 4th, meant for a single 3-6 hours session. The pumpkin-farmers of Goldgrain are in for terror, as in a rather ironic turn of events, their crops rise to harvest them instead. What's causing the pumpkins to become alive and angry? Is it the curse of a long dead witch? Or is it something even more sinister? Why are they dragging the corpses of their victims away, and to where? Who commands them? Soon enough, they'll find out answers to those questions, or perish under the wrath of the haunted crops.

"Ambush at Boxcar Rocks" is a two hour adventure for character level 1-3 (3-6 players) but is easily adapted to challenge higher level PCs by adjusting the spawn rate and the spawn limit. It features one hand-drawn, color map. It can be run as a brutal oneshot gauntlet or a quick side quest to pad the players purses. Deep within the labyrinth of massive, glacier deposited rocks there is a natural cave once used for interring the dead. Now the bones of the pit within stir because of a foolish neophyte. A listless, blood thirsty horde tramples toward daylight and nothing will remain in their wake...

For months, the dreams of the people of Emystrell have become dark and terrible. It seems their nightmares have come to life as in recent weeks, people have mysteriously gone missing, vanishing in the night without a trace! Everyone is too paralyzed by their own despair to do anything or venture far from the safety of their homes. Emystrell is on the brink of collapse. The baron is offering a handsome reward to anyone who can show proof of the end of whatever evil curse that has taken hold of their town. This adventure is designed for a party of 3-5 heroic characters from the 2nd to 3rd level. It has elements of mystery and investigation in the first section which can be detailed and highly involved for groups that enjoy the process of searching for clues and solving mysteries or just as easily glossed over for groups that are more tactics focused. The second section of the adventure features the dungeon: a labyrinthine complex of an ancient elven crypt which the thieves guild has used as a base of operations for a decade...until the serpent worshipping cult arrived. The third section of this book is the detailed map and notes on the town and surrounding area of Emystrell. Roleplaying notes are kept light to allow for room for your own interpretations and details to NPCs remain as free to do with as you choose unless I felt inspired and hoped to give you a cool idea. This adventure has hooks for Dungeon Masters interested in a larger campaign involving the sinister plots of the Yuan-Ti (snake people) as well as other interesting adventure hooks (such as the giants in the nearby mountains or the stolen gem: The Eye of the Dragon). These plot points are intentionally left vague for you to fill in the gaps based on what your players seem interested in. You are invited to use this as a launch point adventure to lead your heroes on a larger adventure that might someday set them against an Anathema Serpent demigod, or it may simply be the adventure that begins their journeys and the evil of Yargoth stops here at Emystrell. If your campaign is set in a pre-published setting, this town of Emystrell can be replaced or fit into any campaign with a few tweaks to local gods and names. If you are playing in Dragonlance, you could replace Yargoth the Dread Serpent with Tiamat, or Dendar in Fearun. The local goddess, Tyr, could be the Tyr from the Forgotten Realms or even Norse myth if that is your campaign setting.

An ancient power has started to rise and threatens a small town. Venture into dark caves and put an end to the power creating the skeletons within. Intended for 6 characters level 5-10 Approximately 6 hours of play Featuring 7 new monsters A transforming boss encounter Easily set in your own world, Theros, or Ferun Can be run with the basic rules Full of unique art a map handout for your players and maps for your VTT You can lean into horror or you can keep it PG. Suitable for gamers young and old for one long session or three shorter sessions.

The end of the road. A lonely fort stands on the banks of a mighty river. It is here the hardy bands of adventurers gather to plan their conquests of The Hill, the hulking mass that looms over this tiny settlement. The Hill is filled with monsters, they say, and an evil witch makes her home there. Still, no visitor to The Hill has ever returned to prove the rumors are true or false. The thrill of discovery is too great to pass up, and only the river stands in the way. The adventurer's boat is waiting! This module is designed for use with the D&D Basic Rules. A trip through the wilderness begins a unique challenge for the novice player and Dungeon Master. TSR 9078

The Red Plumes have increased patrols in the region surrounding Hillsfar, and a string of disappearances has followed in their wake. Naturally, this has roused the suspicion of the factions. Join your factions and find out the truth behind the missing farmers. A four-hour adventure for 1st-4th level characters.

Synopsis: A swamp village is plagued by swarms of insects; several villagers have died from it. It turns out that the local herbalist is actually a vampire who takes the form of a swarm of mosquitoes. Talk to villagers and get rumors, visit the herbalist, suffer through some dreams, get ambushed by the herbalists minions, chase him into the basement to kill him and rescue the villagers. The mosquito vampire and, maybe, the role play involved in convincing the villagers to dig up the graveyard (to find empty coffins filled with sand!) should be fun. The rest of this is pretty simple.

Deep in these caverns overrun with all sorts of foul creatures are two sister hags. Once of the same coven, they now have a bitter rivalry but both refuse to the leave these caverns they call home. The cave received its name thanks to the terrifying sounds that echo through it. Some say it is just the wind brushing against the stone but the rumors all speak of two horrifying sisters casting curses and performing diabolic rituals with human sacrifices in a never-ending hatred. Heroes will face goblin, hag, bat, hook horror, and other terrifying monstrosities deep within the tunnels of The Shrieking Caverns. This dungeon does not contain any of the puzzles from the puzzle section, though there are a few situations the players will find themselves in that will require more than phsyical strength. That being said, this dungeon contains many combat encounters and is expected to take multiple nights to complete.

"As you approach, the miners themselves appear from their hidey-holes around the ruined camp. They are haggard and hollow-eyed, barely able to lift the picks and shovels they've clearly been using as weapons. They are unwashed, muddy and stinking - they look little different to the undead that they have been fighting. Shrouded in damp blankets and shivering, they stare at you silently, even disbelievingly. There is only one left among them who appears to have a little iron left in his spine. He tightens his grip on his pick and steps forward. 'Are you here to help?'" Some doors should never be opened... A group of miners uncover a dark secret and find themselves fighting for their lives as the dead walk again. Can the party rescue the survivors and stop an ancient evil before it spreads across the land? Doorway to Darkness is a 3-5 hour adventure for characters of 2nd-3rd level. It features roleplaying, traps and horrifying combat encounters...

Horrors in the Dark The origin of the ShadowGate is lost in antiquity. Some claim it as the work of devils, others cannibal cultists or even demon lords. Not long after its discovery it was boarded up by the priests of the local church, and then fortified by paladins. Of late something has emerged from the portal. It remains trapped within the divine defences, but for how long?

A strange journey through a living cavern. A request for help to rescue a mining crew leads a group of adventurers into a cave that has seemingly come to life, gripped by a melancholy wave of sadness and memory. In dark caverns where mushrooms walk, vines dance, walls watch, and stones speak, will your band of adventurers become heroes? Or will they be lost within the Mines of Memory? Mines of Memory is a short, 2-3 hour adventure for characters of levels 1-3. It is a delve into a cavern system that has become a Psychic Resonance environment, awakening the caves themselves. PCs will enter to rescue the miners, find the source of the mine’s awakening, and bring peace to a noble creature trapped in its own nightmare.