At the behest of Orcus, Demon Prince of Undeath, a mighty deathpriest hierophant has begun assembling a powerful strike force. He intends to launch the first of many assaults on the world, readying it for his master’s arrival. With the help of potent allies and grand rituals, the PCs have discovered a route to the Abyssal headquarters of this hierophant. This delve begins as the PCs teleport from the world to the first of a complex of interconnected chambers deep in the Abyss, linked only by portals. Pgs. 126-131

The Iron King's daughter has been cursed by a demon who lurks inside a mirror locked deep in the palace dungeons. Can the characters win their freedom from those same dungeons by entering the mirror demon's horrifying, maze-like realm and finding a way to end the curse? The Demon in the Mirror is a creepy dungeon crawl adventure for 5th-level characters. It takes about 5-7 hours to complete and includes: -An otherworldly, reality-bending realm inside a magical mirror -Four new monsters: the mirror demon, ceiling creep, reflection demon, and librarian of Leng! -Combat cards for each monster, PC, and special treasure -Gorgeous digital maps (with and without grid) for virtual table tops

It's like a 'Legend of Zelda' puzzle dungeon, but instead of Link, you play as a group of grubby grave robbers. Also, there's way more eyeball stuff. Puzzle Dungeon: The Seers Sanctum is a system neutral adventure for characters of level 1 to 4. It will work with any old school games like Old School Essentials or B/X or the most recent version of the world's most popular roleplaying game. What's in it: * 10 room dungeon crawl where each location has its own mysteries to poke and experiment with * Cohesive puzzles that build on each other * Lets players to discover their own solutions in true OSR fashion * Magic items and equipment that change how the players interact with their environment and previously explored areas * Use as a 4-6 hour one-shot or the start to a planar hopping campaign for wherever you'd like to go

This adventure is designed as a side quest that can be inserted into an ongoing adventure or campaign. It involves a series of three linking scenes (and an optional fourth research scene between the others) that can be placed in between the action of whatever other event the party is undertaking. Ideally the scenes of this side adventure should be spread out and inserted into the game over several sessions of play.

Do you want to fight a moon? The Matter of an Overmind is an epic space-faring Draw Steel adventure for three to six 4th-level heroes. When the heroes follow a protean ship through the ethereal void, they encounter a rogue planetoid which turns out to be a living overmind! How do you even fight something that size? At 4th level! Hop aboard your starsail and find out! Over the course of 2-3 sessions of play, the heroes can earn up to 8 Victories. This adventure includes: - Four combat encounters of varying difficulty - A negotiation and a high-action montage test - 10 new monsters, 1 retainer, and a new title to claim!

"The trees bend, twist and rearrange themselves as the sun fades, replaced by a single massive moon hanging high in the sky. You find yourself somewhere altogether different with bigger more gnarled trees, everything more vibrant with color in the bright moonlight. The bold browns, purples and blues around you don't feel real, more like something from a beautiful painting. Yet here you stand..." This is a one-shot adventure through one of the twisted fairy tale baronies of Thelanis. In it, the players find themselves in a strange land seeking an item they know little about. They will encounter a village whose people have been turned to shrubs, be shrunk down to a 20th of their size in a garden of tiny trees, fight a tree which is also a beholder, and come face to face with the Lady in Shadow herself. The adventure is for four level 5 players (though adjusting for 3-6 players would be minimal effort) and is expected to take around five hours. It is a great introduction to the planes of Eberron for DMs and players alike. It includes: * An exciting mystery to unravel * Three vicious new monsters to fight: earth bear, topiary beast, and the treeholder * Simple rules for running a skill challenge * A series of detailed maps for each combat encounter and an image for the puzzle encounter

All aboard! An investigation turned Groundhog Day horror mystery, this unique puzzle-like sandbox-on-rails adventure traps your players onboard Cyre 1313: The Mourning Rail. This lightning-rail train and its passengers are stuck in a time loop with no escape, cursed to ride forever in the endless mists of Ravenloft. The PCs wake up again & again, unable to leave the train's time loop until they figure out how to stop it. Each new day in the loop is a new chance to delve into the mystery and stop the forces responsible for the endless cycle. Why is Cyre 1313 stuck in time? How will the PC's escape? Who is the nefarious mastermind at the front of the train? How the players answer these questions is up to them! Product Overview: 37 pages for running a 6 to 9 hour adventure for three to five players of 3rd or 4th level. Time tracking and other systems to create the time loop. High resolution maps of each train car. A complex web of puzzle pieces for PCs to play with. Tips and tools to scale with player level, change difficulty, and add complexity. Suggestions on how to make it your own. Perfect to integrate into your Ravenloft, Eberron, or homebrew campaign! Product created free of AI generated content

We get it. Factions are an integral part of D&D, but it's not always clear how to use them in your campaigns. Luckily, Factions of Sigil has you covered for each of the twelve main factions found across Sigil and the Outlands! This supplement goes over the various rules and lore around the primary factions found in Sigil and the Outlands, making it easy for any new or veteran DMs to integrate the factions more into the core stories being told, and making them feel more useful for the players that choose to join. Rumors of a means to access the Plane of Mirrors has spurred the Society of Sensations to request the characters enter the demi-plane and record the sensations and experiences within.

Millennia ago, aberrations from Xoriat, the Realm of Madness, were driven from Eberron. The Gatekeeper druids–mostly orcs–placed powerful dimensional seals throughout Khorvaire to prevent the creatures of Xoriat from returning. To repair a breach in one of the seals at a settlement called Tjorda, a Sealguard Complex was built. An immortal guardian ws tasked with attending to the repaired crack in the seal. Thousands of years later, the Gatekeeper druids rediscovered the sealed complex. Even without knowing its precise history, they ascertained its sacred nature and have guarded it from then on. Being sealed in to protect the site and commune with the inner guardian is considered a great honor. Much of this history has long-since been forgotten. But 10 years prior to the adventure’s start, Vilda Karrte–a relic hunter with her own agenda–tracks a Xoriat artifact called the Spiral Well to the complex. Turned away by the Gatekeeper, she forces her way inside, grievously injuring them. Having discovered Vilda’s journals, Provost Nigel Faurious, through the Clifftop Adventurers’ Guild Handler Lhara, tasks the adventurers with recovering the Spiral Well.

Designed to remedy the lack of "end game" content for Old School-style gaming, The Dreams of Ruin is a setting-neutral adventure supplement aimed at characters of level 12 to 16. The material can be used with groups from level 8 to max level (and beyond, if the system supports ascent to divinity for high-level character). Capable of challenging even the most experienced players and most powerful characters, The Dreams of Ruin are an unforgettable addition to any high-level campaign. But beware! The dreams are mighty and can overwhelm even fearsome warlords and powerful wizard-kings. One touch of them, and your campaign world will never be the same.

Four doors of mystery appear in the Cage. They lead to four adventures, if a basher has the dark of them. "These aren't doors in the traditional sense, cutter, but they're portals just the same. They appear for a short time every 500 years, popping up in different parts of Sigil. Each hides a mystery that's waiting to be solved, and together they just might hold the key to a secret of the multiverse. All a body's got to do is tumble to the right keys, open the doors, and face down the Unknown." - Estavan, merchant lord Doors to the Unknown is a collection of four Planescape adventures that can be played separately or as a mini-campaign. When four doors appear in the Cage, the barmies crawl out of the shadows, and the heroes get drawn into events that could have consequences for the entire multiverse. Each door leads to a different plane and a different deadly challenge for the player characters. Together they offer a way to stop an ancient menace before it strikes again.

Death Is in the Cards The remnants of the Ebon Fold are cutting a deadly path through the Falkovian countryside, draining travelers of their life force and leaving withered corpses in their wake. Hot on their trail you come across the sole survivor of one of these deadly attacks, a young vistani man with an extraordinary skill for fortune-telling. His tarokka deck helps close the gap between you and the assassins. Together you follow the trail through Darkon, the dark domain of the lich lord Azalin, to the city of Nartok. With an Unholy Alliance... Something very strange is happening in Nortok. The killers enter the Temple of the Eternal Order and don't come out. It seems that the state of religion of Darkon is giving succor to these assassins. To make matters more confusing, the Kargat, the domain's secret police, has put aside its feud with the Eternal Order and has a large contingent staying at the temple as well. These three organizations working together bodes ill for the residents of Nartok. ... And Schemes Within Infernal Schemes Great amounts of life energy are being collected for some foul purpose, although no one seems to know what exactly it is. The tarokka cards provide only mysterious glimpses of the future - a future in which a powerful evil sweeps the land and Death walks the world. Can you discover the truth of what is happening in the temple in time to avert the disaster predicted by the cards? Death Ascendant is a full-length adventure that can be run as a stand-alone scenario or as the second part in the Grim Harvest series. It contains a 64-page adventure booklet plus a full-color poster map detailing the Temple of the Eternal Order. TSR 9526

In Old Korvosa, nightmare-spawned horrors begin stalking the district's shiver addicts, sparking a manhunt to bring those responsible to justice. What role does the strange cult known as the Brotherhood of the Spider play in the mysterious deaths, and why is the veil between the dreaming and waking worlds so thin? To solve these mysteries and others, the heroes must walk the unseen paths of Bridgefront's occult underworld, and even enter the Dimension of Dreams itself to unravel the web of intrigue concealing the cult's deadly machinations. But what will happen when the heroes' own dreams turn against them, and what becomes of those who uncover esoteric secrets too terrible to know? Beset by dangers from their own minds, the heroes must race against time to save Korvosa—and their sanity.

At the mercy of Chaos! Abducted by the Court of Chaos, the adventurers face hard choices if they want to return home. The Host of Chaos desires a legendary artifact held by the Scions of Law and need patsies to retrieve it. Faced with an eternity of servitude, the party must sneak into the Plane of Law and steal the Yokeless Egg from under its guardians’ watch. But not all is what it appears when the Court of Chaos is concerned and serving the Host may destroy the party from within. Can they survive the Intrigue At the Court of Chaos?

Magical soul gems have been stolen from the secret vault of the goddess of death and scattered across the planes. Some want these gems to unlock the secrets of the multiverse. Others want them for personal power. Still others want them to resurrect a fallen deity. As the god of oblivion looms near, can the PCs retrieve the gems from their new owners in time to save their world? Beyond the Vault of Souls is a planar adventure for 9th-level characters, compatible with the 3.5 edition of the world’s oldest roleplaying game. Within you’ll visit the Eternal City of Axis, brave the dangers of the Abyss, and match wits with the torturer daemons of Abaddon. This adventure is set in the Outer Sphere of the Pathfinder Chronicles campaign setting, but can easily be placed in the strange planes and dimensions of any game world. It can be used on its own or enhanced with information from The Great Beyond, A Guide to the Multiverse.

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

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.

Light of Xaryxis is a thrilling space adventure set in the Spelljammer: Adventures in Space campaign. Heroes sail through the vast expanse of wildspace, encountering cosmic threats and unraveling mysteries. The Xaryxian menace, fueled by the star Xaryxis, seeks to annihilate the multiverse. As brave spacefarers, your characters must navigate intrigue, battle alien foes, and ultimately decide the fate of worlds. Will they save the realms or face oblivion in the cosmic glow of Xaryxis?

A storm of unparalleled fury has been ravaging the peaks of the Earthspur Mountains for a tenday, and the Monastery of the Yellow Rose sits in its eye for now. Some monks have fled the monastery to the safety of Mulmaster and beseech you to convince their more obstinate brothers to retreat to the city before the eye of the storm shifts, and the monestary is in terrible danger. Can you brave the elements and convince the monks to escape?

Welcome to the Cage, friend. You'll want to watch your back in Sigil - it seems every cutter here's got a way to peel a clueless basher, and you're no exception. Besides, there's something happening down in the Hive that's got the factions in an uproar, and word is you're the cutter to look into it. Barmies and bubbers have been waking up in the Dead Book, but they haven't been staying there. They've been returning to Sigil with minds restored, telling tales of the Eternal Boundary. But the air's turning foul here in the Cage, and there'll be blood spilled soon if someone doesn't learn the dark of things, an quick! The Eternal Boundary is a Planescape adventure for a party of four to six characters of 1st to 5th levels. Players are introduced to the city of Sigil - the Cage, as some call it. Inside this crossroads to the planes, a sinister plot unfolds, leading the heroes into the most dangerous and desperate part of town - the ramshackle slum known as the Hive. Do your player characters have what it takes to confront the Eternal Boundary - and pass beyond?