Expand your game with this collection of 56 NPCs of various Challenge Ratings, thirteen of which include maps and details of their lairs. Add these NPCs as a side-quest, a main villain, a one-shot, a bounty for easy money, or however else you wish. Written by some of the best-selling authors on the Dungeon Masters Guild and outstanding podcasters, each NPC includes an image, a backstory, motives, flaws, and a stat block. Some even include new magic items!

As a member of a bold party of adventurers, you and your associates have trekked far into what seems to be a whole underworld of subterranean tunnels -- arteries connecting endless caves and caverns which honeycomb the foundations of the lands beneath the sun. Your expedition has dogged the heels of the Dark Elves who caused great woe and then fled underground. This module can be played alone, as the conclusion to module D1 & D2: "Descent into the Depths of the Earth," or as the third module in a series that forms a special extended adventure (G1-G3: "Against the Giants"; D1-D2: "Descent into the Depths"; and Q1: "Queen of the Demonweb Pits"). TSR 9021

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.

When the PCs stumble into the Feywild, they find themselves in the middle of Mithrendain— a glorious eladrin city of grace and beauty. But as the heroes find themselves the target of mysterious attacks, they begin to discover that something rotten lurks in the city’s heart. Sunlight bathes the soaring towers of the eladrin city of Mithrendain. Gentle breezes swirl through wooded parks and along well-kept streets, and in the ancient settlement whos golden hues have seen it named the Autumn City, thousands live in peace and prosperity. For centuries, the fomorian chasms deep beneath the city have stood silent below the great magical seals that closed them in the wanting days of the eladrin empire. Over long years, the folk of Mithrendain have forgotten the dark threats of old, becoming complacent in their tranquility. And so none suspect that corruption lurks at the heart of the city, spreading out from the shadows to taint all it touches. Pgs. 104-128

"The Aboleth's Grotto" is a nihileth lair suitable for four 10th-level characters. The adventure can be completed in one session. The small town of Springwell harbors a secret that almost nobody knows about, and those who do conveniently ignore: it sights right over an unoccupied settlement of the deep caverns of the underworld.

The Adventurers arrive at a drow outpost in the Underdark. They must either dispose of the drow or ally with them against the invading legions of Orcus!

The kuo-toa are a piscine race with a psychic affliction that makes them behave erratically and invent gods when feeling threatened. That same affliction gives them the power to bring those gods to life. Blibdoolpoolp is the most widely worshipped, and thus most powerful, of their gods. Blibdoolpoolp views the kuo-toa as her children despite having been born after them. Like all good mothers, she nurtures and protects. One of her chief concerns is understanding the kuo-toa’s psychic affliction, which causes them to undermine themselves whenever they strive for greatness. She discovers that a corrupted elder brain deep in the Underdark has a connection to the race; though the connection gives them psychic powers, it also turns them into powerless thralls, explaining their self destructive behaviors. Constrained by the same leash on her children, Blibdoolpoolp seeks adventurers to destroy the elder brain. Its death would free the kuo-toa, but potentially at great cost: if the kuo-toa lose their powers, will Blibdoolpoolp die?

How’d you get here? Let me explain... No, there is too much. Let me sum up. Rescued a retired hero's hapless nephew from goblins at some ruins on a hill Found out that there aren’t any goblins, but spider creatures called chitine instead Uncovered a chitine plot to start a war between the surface world and the drow Got convinced to try to stop that war Got trapped in the caves under the ruins Chased the chitine’s leader, a choldrith, further down into the cave system Nearly got crushed in a cave-in Fought your way through an undead infested mine Nearly got eaten by a colony of chitinous reptiles Picked up the choldrith’s trail and followed it deeper into the earth And now you stand at the entrance to a massive cavern filled with all manner of aggresive creatures. Yep, that about sums it up! And now, here you are, in this giant cavern thousands of feet beneath the surface. All you have to do is pick up that choldrith’s trail again, and manage to navigate the many factions vying for control of this little section of the Underdark. Good luck! And have fun storming the Hollows! This Gazetteer contains: Descriptions of the factions that live in The Shadowed Hollows, a massive cave complex far below the surface The underground city of Naakrasad and the important NPCs that live there Three quests leading to brief adventures within the Hollows for characters of level 4 to 6 7 custom maps of the Shadowed Hollows, Naakrasad, and the quest destinations All necessary monster stat blocks Everything needed to set the scene for the upcoming second chapter of the Into the Underdark Adventure Series

For the most part, the town of Ockney’s Hold has always been a peaceful place—bordering on boring. The most interesting things going on in this frontier mining settlement include the annual livestock fair, the cost of spirits at its various inns, and speculation fueled by those same spirits as to what foul things are being dumped into the river by the ore refinery. Recently, however, the usually placid Baron Reinson has begun to act erratically, ignoring most of his counselors, giving more responsibility to his equally erratic chamberlain, and replacing key figures in Ockney’s Hold with outsiders. With no clear answers as to what might be behind the baron’s strange behavior, his last loyal counselor seeks out a band of adventurers to help. Will these brave heroes be able to get to the bottom of a widening conspiracy? And can they expose the terrible and unseen forces manipulating the baron in time to save Ockney’s Hold? Published by Gamehole Publishing.

A dwarven expedition has stopped in Mulmaster for much-needed supplies. Furgis Boltsmelter, their founder and leader, is looking for some “no questions asked” protection for the duration of his stay in the city. Whatever he is trying to protect may not stay hidden for long. Can you keep his secret treasure out of the wrong hands? A four-hour adventure for 1st-4th level characters.

The Nexus spore is an intriguing Underdark adventure that can be sewn into any subterranean setting. This one-shot production was designed with long campaigns in mind, for when you want to break up the narrative to keep things fresh and interesting. This short adventure is ideal for players of level 5-7, although, much like the length of the adventure, it is easy to adjust. The adventure fits well into a single long session, or 2-3 short sessions. It comes complete with maps, stat blocks, boxed descriptions and a rare magic item.

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

Written by the setting’s creator, incomparable RPG author Monte Cook, Ptolus: Queen of Lies is an action-packed fantasy adventure painstakingly re-designed for Ptolus: Monte Cook’s City by the Spire. Involving numerous challenging scenarios for characters of 11th level, Queen of Lies is filled with dozens of dark elf personalities, cunningly showcasing their alien culture—a world of merciless betrayal and sinister lusts. Deep below the surface, in the sunless lands of the Netherdeep, creatures of darkness build weapons and amass armies, dreaming of invasion. An attack on a peaceful elven shrine in Emerald Hill sends the heroes on a quest to retrieve stolen artifacts and kidnapped friends. All signs point to the actions of the dark elves of Ul-Drakkan, far below the city of Ptolus. However, even within that ancient fortress, there exists a deeper darkness.... Underground enemies lurk beyond every twisting passage, and strange creatures abound. The foul culture of the dark elves is both decadent and cruel, and the heroes may discover that they’ve stumbled into a web of deceit and treachery spun by the self-styled queen of the dark elves. Can the player characters complete their mission without being discovered, or will they find out, perhaps too late, that their actions been orchestrated all along by the wicked Queen of Lies? Published by Fiery Dragon Productions

Save the village of Millvein! Prevent a war with the drow! In this 3-4 hour adventure for 4-5 characters of 2nd level, travel to a small chitine lair to prevent them from destroying the small village of Millvein and inciting a war between the surface and the drow. Includes: A 3-4 hour adventure for 2nd level characters Map of the village of Millvein 2 DM maps Stat blocks for all monsters the players might encounter. See where the adventure began in Into the Underdark - Part 1 A Family Affair The adventure continues in Into the Underdark - Part 3 They Call It A Mine

In the Anauroch desert, darkness is growing. The followers of the Vile Spore Goddess Zuggtmoy have stolen the dreams of the Bedine Seeress Deja, trapping them in an eldritch artifact. Unless her dreams are returned, the Seeress will descend into madness, and her people along with her.

When her father goes missing, a young adventurer has no other choice than to gather her friends and head for the city of Loudwater. Soon after she gets swept away in an obscure design threatening to drag the entire region into chaos and war. At the heart of this mystery, lies not only her father, but the long-forgotten history of her once-despised family and a primordial beast influencing events from the shadows, moving her family like pieces on a chess board. Visit www.perfumersdaughter.com for more information. You can also address me directly on The Perfumer's Daughter Q&A on Facebook. All battlemaps and dungeons are free to download for use in digital platforms (such as roll20) on the aforementioned site.

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

Explore political intrigue, gene splicing, and a thrilling battle for survival in the Timescape's World Below in DOOM of the DRAGON GRAFTER, a 9th to 10th-level adventure for Draw Steel! You and everyone you know has a story of the dragon who ruined your life. You've lost so much and wondered why it had to be this way. Recently you learned that all these dragons that wreaked havoc on Orden were intentionally created to do so, all as an experiment run by a voiceless talker known as Lord Pulposa. You don't know why he did this, or how you're going to break into his lab. What you do know that you're going down into the World Below after him to make sure his schemes will never hurt anyone again. You are the Doom of the Dragon Grafter. Features: - Over 25 pages of an adventure written by the author of The Workshop Watches and The Fall of Blackbottom (that's me!) - 23 Victories worth of encounters - Lord Pulposa, a level 9 Solo Monster designed by Scott Bullock, guaranteed to terrorize your friends and enemies - Battle Maps & Positioning Maps for most combat encounters - Some Draconian fiction thrown in there for good measure - Shared under a CC-BY Sharealike so you can do whatever you want with it - A Goblin named Spanky

Hellmaw Island is a place of legend, a hidden fortress protecting the greatest treasures in the world. Rumour says it is guarded by wicked traps, bizarre and terrifying monsters, and maddening enchantments. Our heroes have been tasked with penetrating this mysterious stronghold, and they will find it to be stranger and more dangerous than anything they have encountered before. Assault on Hellmaw Island is a 5th Edition Dungeons & Dragons adventure for characters of levels 5-10. It will take 4-8 hours to complete.

TENTACLES. VERY DANGEROUS. YOU GO FIRST. Adventure in the Underdark, Part Two The colony of svirfneblin, while grateful for the adventurers’ deeds, is still in need of a reliable source of drinking water. The kuo-toa hold the lake, and there is the matter of the tentacled menace the party faced previously… This adventure is a continuation of Tentacles. Why Did It Have to Be Tentacles?, but can be run by itself as well. It is designed to easily fit into any standard fantasy setting. A 4-hour adventure for 6th-8th level characters