With allies gained from denizens of the Underdark, the former drown enclave of Szith Morcane is on the precipice of being retaken. During the battle for Szith Morcane, secrets of the drow community are revealed. What will you do with this knowledge, and how will it affect the outcome of the conflict?

On a nameless, featureless demi-plane the Tarrasque rages across an all-encompassing nothingness. Last seen on Faerun a century ago during the cataclysm of Odobaz, the battle mage order of the Eldritch Storm sacrificed itself to banish the mighty titan to its demi-plane prison. Now a foul power emerges in the High Ice and nightmare visions of the Tarrasque trampling cities wrack the minds of the living—can your adventurers defeat the Horror Under the Mountain?

The Underdark is a subterranean wonderland, a vast and twisted labyrinth where fear reigns. It is the home of horrific monsters that have never seen the light of day. It is here that the dark elf Gromph Baenre, Archmage of Menzoberranzan, casts a foul spell meant to ignite a magical energy that suffuses the Underdark and tears open portals to the demonic Abyss. What steps through surprises even him, and from that moment on, the insanity that pervades the Underdark escalates and threatens to shake the Forgotten Realms to its foundations. Stop the madness before it consumes you! Note for DMs: This adventure is not for the faint of hearted, to run or to play. The module starts with 10 NPCs traveling with the party through the grueling Underdark. This number can grow. The encounters within the book are often incredibly deadly for the characters that would be going through it. This is because the module expects them to run or talk their way through the events, or, in some cases, the module expects them to lose. If your players aren't the kind of party to run, talk, or surrender, do not get this adventure. The module almost requires that you use milestone leveling because the experience provided does not commonly get players to the levels they should be once they get to certain milestones in the story (7th when they leave the underdark, 15th when they face the demon lords.) Good luck and happy questing.

After a drow girl goes missing, characters must delve into the depths of the Underdark to bring her back. As they journey through the dark, characters discover not all monsters are monstrous and webs are capable of restraining all manner of creatures; in fact, they can capture magic itself.

Detailed encounter, easily convertible into an adventure. Starts from investigating ambushes on the mountain pass and quickly escalated into a more twisted story about duergars, alhoons, and treasure vaults. Setting-agnostic (classic fantasy - best)

The mine has been known as Tessount’s Folly for years, due to it producing nothing of value. Now Valmour, the youngest son of the mine’s late owner, has inherited the mine...and found something he should have left buried. Pgs. 56-81

The Borderlands. An untamed wild region far flung from the comforts and protection of civilization. A lone fortified Keep is the only bastion of Good desperately striving to maintain the forces of Chaos at bay. But Evil is everywhere, lurking in dark caves, fetid swamps, forlorn forests. Bands of cutthroat brigands and ruthless tribes of humanoids eager to clash with the forces of Food rove the region. The Borderlands hold many secret wondrous locations, and opportunities for fame, prestige, and fortune are plentiful. But equally abundant are the perils, risks, and challenges to those brave enough to explore the wilds. Sharpen your swords and axes. Purchase your iron rations and tinderboxes. And Don't forget at least one 10-foot pole. Adventure awaits those with the mettle to confront Chaos in the Borderlands!

Eons ago, the demon lord Shomarrah defamed Lolth the Spider Queen, condemning herself into the cursed life of a massive purple worm. Now Shomarrah's desecrated body serves as a drow fortress, guarded by a mad sorcerer and his team of driders. What deeper evils lie within? "The Fasting Worm at the Spider Feast" is a Dungeons and Dragons 5th Editionmodule for a party of 3-5 players at level 8. This one-shot module is perfect for introducing your party to the Underdark and drow society, featuring a dungeon dive through a demon lord's snake-like carcass. Clerics in the party, upon completing the adventure, will be able to obtain access to the Feast domain. Details are provided at the end of the module

Side-Trek adventure When your PCs gain access to the teleport spell, their whole world changes. That simple spell opens up instantaneous, long-distance travel. No more long overland journeys or dangerous retreats through hostile territory. All it takes is clasped hands and a word from the wizard, and poof! The PCs are where they want to go. Except that it isn’t that simple, because teleport isn’t foolproof. The off-target teleports are a matter of scattering your PCs someplace else on the map and forcing them to get their bearings and make the long overland journey anyway. But this Side Trek focuses on the really intriguing column on the teleport chart: “similar area.”

A 20-page adventure for OSE Save the wizard! A sunken cathedral on a quiet mountain lake hides a long forgotten temple to Mathanoga, God of Knowledge and wizardry. Abandoned by Man for centuries , but protected by the legend of man-eating fishmen lurking in it. Or until a few weeks ago the young wizad Elric embarked on its expedition. With help from the accademy of Greykeep he found the temple and began to explore it, hoping to uncover its ancient magical secrets. Now the wizard is missing and the accademy has put a bounty on its head: its weight in silver to whoever will find him and bring him home alive and well. Find magical secrets! Deep inside the temple are stashed many magical items, all sacred to the fishmen dwelling there, all worth dying for. Save Elric and the treasures will be yours! The Sunken Temple is an expert 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 Baronies of Erlkazar, once a prosperous region of pastoral tranquility, is now a land of nightmares and dread. Bandit armies plague the region, terrorizing the populace and surrounding countries of Calimshan, Tethyr, Amn, and Turmish. Though these threats are terrifying enough, it is nothing compared to what awaits the people of Erlkazar at night. In caves, tombs, and subterranean communities beneath the seemingly pastoral villages of Erlkazar live the secretive Night Barony. Ruled by the vampire Saestra and her legions of darkness, these monstrous denizens of the Five Baronies are the real power in the region. The country’s only hope of liberation is you.

Part 3 of the Shackled City Adventure Path "Wherein a tribe of the Sea Mother's children suffer for sparing the life of a mad prisoner they probably should have eaten." Synopsis: The adventure begins with an Umber Hulk attack in the middle of the city. The fame gained by assisting during the attack allows them to gain the notice of a representative of Davked Splintershield. The group is asked to rescue Zenith Splintershield from a Kuo-Toan temple in the Underdark. But to find it, they have to visit Crazy Jared to locate an entrance to it. Upon journeying to Crazy Jared's, they fight Hookface's offspring. After more travelling, they are able to descend into the Underdark. Once they find the Kuo-Toan temple, they must fight through many hard challenges, only to realize that Zenith is not a prisoner, but instead is a prophet. Zenith does not go willingly, and so must be captured. Pgs. 28-61

A cave-in at the dwarven mine exposed a passage into the eerie, alien world that lies deep below the surface. Monsters poured out of the darkness and killed many before the surviving miners made it back into the light. Now they seek brave adventurers to face the dangers down in the dark depths. As a one shot or the first adventure of a new campaign, The Eyeless in the Dark carries new and experienced players away from the light of the ordinary surface world and down into the fantastical dark depths where here there be monsters. Chock full of adventure, as well as design notes for Dungeon Masters that will help novice and veteran DMs provide their players with an exciting and memorable game night, and leave them eager for the next session. Use this adventure in combination with the Integrated Hill Encounters and/or the Forest and Grasslands to create an open world sandbox of adventures that can fill many sessions of a campaign.

The greatness of a dwarven citadel is measured by its greatness of wealth. The dwarves steadily work mines and forges to fuel the wealth needed to make their presence known throughout the realms. Unfortunately, this also makes them known to those that would seek the opportunity to steal their glory and riches. This story occurs in a place that has experienced this struggle for millennia. New threats emerge as old threats become rivals through the tides of time. This story... your story... is another chapter of this ancient struggle.

Nightmares that kill, a mysterious thief that only steals knick-knacks, tales of a huge beast terrorising fisherfolk, an inn with disappearing guests, discoveries of hidden magic portals and rumours of an assassin at large: None of these things are enough to stop the ever-flowing tide of traders and travellers crossing the Bridge of Fallen Men, but its protectors - Cormyr's Purple Dragons - are short on time, and courage... ...will adventurers answer the call?

Troubles simply mushroom in the Underdark. The alchemist would like some fungus and spores, but no one wants to get them. Perhaps you could help. The adventure begins with the party finding a caravan. In addition to being able to trade with these NPCs, the party also can be hired by an alchemist to bring bag some red fungus and some Myconid spores from underground. Underground, the party will have a chance to interact with friendly Myconids and venture through a large labyrinth of passages (this labyrinth isn't mapped and is dealt with through storytelling, random encounters, and roleplay). The adventure culminates in a battle between the Myconids and Flinds, and the players can participate. Pgs. 4-12

Ruins of the Grendleroot is a book of ten easy-to-prep and easy-to-run adventures for the fifth edition of the world's most popular fantasy roleplaying game. Designed for characters of 1st to 5th level, these adventures take place in the caverns, chambers, tunnels, and ruins of Blackclaw Mountain, within which lurks a strange otherworldly sentience known as the Grendleroot. Ruins of the Grendleroot focuses on the sense of mystery and wonder that comes from exploring ancient ruins and lost chambers. The central hub of these adventures, Deepdelver's Enclave, is a frontier outpost overlooking the ruined city of Shadowreach, set deep within the mountain. In Deepdelver's Enclave, adventurers and explorers recount tales of their explorations, trade treasure and artifacts, and enjoy their shared love of uncovering the mysteries of the mountain.

The most deadly dungeon ever devised! High-level characters brave the unexplored corridors of Deepearth to confront perhaps the most feared adversary in the AD&D game. The second chapter of the Bloodstone Pass saga follows the conclusion of the desperate war against the bandit army. A cold and bitter winter drives the villagers to the edge of starvation, and numerous horrors strike the town of Bloodstone Pass. Join the adventure as the heroes explore the depths of the ancient bloostone mines, now inhabited by fearsome demons. There they hope to uncover the fantastic treasures rumored to exist in the unknown darkness. But deep within the mines, all is not what it seems.... This module uses the new rules from the Dungeoneer's Survival Guide and Wilderness Survival Guide. The adventure also includes optional BATTLESYSTEM scenarios fought entirely underground. These supplementary products are not required to play the adventure, however. TSR 9168

From the magazine: "The monster you're sent out after is so dangerous that even mind flayers fear it. And the illithids want your help!" Earthquakes hit the area around Needlespire mountain, affecting both dwarven and deep gnome villages, and the local mining industry. Deep gnome expeditions discover an illithid outpost! This adventure includes roleplaying encounters with both deep gnomes and illithid in their quest for the true cause of the earthquakes. The creature causing the earthquakes is a draknor which has sent its huge tentacles into the earth seeking magma to fuel its growth. Pgs. 38-60

In this small 20 page adventure module, centered around an archaeological dig, revisit Bull Creek and find out the secret behind what really lies in the hero Vertrixx Mazilaxx's sarcophagus. To do so, you'll have to meet up with master archaeologist Geranimus to delve deep into the ground. On the surface, politics boil and tensions between species are high. Below, secrets are to be uncovered. Can your party find the truth? Find out in Old Bones. Old Bones- a 5e SRD adventure for levels 4, 6 and 8. In James Grammaticus' Dungeon Short series, James explores fantasy worlds and settings in short bite-sized one or two shot adventures that be used on their own, can spring off into a larger campaign, or can be used as a side-adventure in a campaign.