In this prelude to the full Princes of the Apocalypse campaign book, adventurers face off against the influence of Elemental Cultists in the hills and canyons of the Dessarin Valley. The four mini-adventures within are only tangentially related to each-other, and instead serve as starting points and hooks for the plots of the complete Princes of the Apocalypse Campaign. Players start in the well-described town of Red Larch; first investigating a local necromancer, then uncovering cult influences within the town, and finally heading off to infiltrate or do battle with two small elemental cultist strongholds. All parts of this adventure can serve as great places to seed hooks for other campaigns.

Designed as an Introduction to the world of Eberron and is intended for a party of four 1st-level characters. This adventure takes place in Sharn, the city of Towers. It begins, as many incidents in the City of Towers do, with a corpse. A warforged assassin, a mysterious blank book, and an offer from a House Cannith heir leads the adventures into the depths of Sharn--eventually to an ancient ruin dating back to before the creation of the Kingdom of Galifar. Along the way, if the adventures are successful, they recover a lost schema--a part of a pattern used by artificers to craft magic items. They also learn that many different agencies are interested in this relic, including those loyal to the various House Cannith elders and agents of the infamous Lord of Blades. Pgs. 307 - 317

"Wherein the local clergy makes the terrible mistake of not hiring enough assassins for the job." Synopsis: The heroes have just returned from the abyss (Occipitus) and reestablish themselves in Cauldron, when they are assaulted by a group of professional assassins. After they repel the attack, they trace back the lead to the temple of Wee Jas, where they find plenty of opposition from the second in command, Ike Iverson. After dispatching of the cleric and securing of a (spare) soul cage, the group finds evidence of a place important to the cagewrights' cause - an ancient underground complex named Karran Kurral. Mounting an expedition to that place, they find more evidence towards the horrific destiny on schedule for Cauldron. However, they gain access to the Soul Pillars after defeating a dracolich, that they can use to gather plenty of intelligence on the cagewrights' plans. Pgs. 12-51

Something strange is afoot within the Quivering Forest. So much so that even the elves of Greenhall have left their homes to seek out help from their newfound neighbors. But, their tales of a strange beast are not earning them any favors; especially among the Vistani, whom the elves suspect are to blame for their ills. Return once more to the Quivering Forest and learn the terrifying truth! Part Two of Misty Fortunes and Absent Hearts.

Stagwick’s long-standing peace with giant-kind is threatened as a patrol of Blood Riders spark a feud with a local tribe of giants. With word of strange activity coming from the Ice Spires, Good King Hartwick can’t be too careful. Can you quench the giants’ thirst for revenge?

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

Hurtling through time, you find yourself embroiled in a struggle to keep the fledgling town of Waterdeep from succumbing to a vicious Troll invasion. But sometimes the true threat lies within the city walls... Part Two of the Folded Time 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!

All of the Treasure, None of the Traps is an adventure that includes a single gauntlet of traps that contains twelve traps; meaning that it has either one or twelve encounters. The adventure consists of a long, twisting corridor with all of the traps set off, but these traps are reset by the PCs when they reach the center of the area. Pgs. 32-34

A book donated to the library-city of Candlekeep details how the previous owner created a mansion in a pocket dimension and what the command word to enter is. The gateway was recently discovered, and the characters need to enter the mansion to retrieve the researcher who rediscovered it.

The lost Bloodtower has returned, arising from its earthen grave to stand as a mute sentinel over the fog-shrouded moorland. In the weeks since it's return, local travelers have spoken of new undead roaming the countryside. Pgs. 80-87

The monks of the Monastery of the Yellow Rose have long cloistered themselves in their home atop the Earthspur Mountains, practicing their strange lifestyle which is rumored to give them longevity. Now, their dietary restrictions and practices of breath control have become the fashion amongst the well-to-do of Mulmaster. But when a few of these lay practitioners start dropping dead from suffocation and starvation, others start to question the validity of the monks’ claims. Is this simply a deadly ignorance, or is there a fell wind blowing through the rich and powerful of Mulmaster?

Welcome to Waterdeep! A fantastic treasure trove is yours for the taking in this adventure for the world's greatest roleplaying game. Famed explorer Volothamp Geddarm needs you to complete a simple quest. Thus begins a mad romp through the wards of Waterdeep as you uncover a villainous plot involving some of the city’s most influential figures. A grand urban caper awaits you. Pit your skill and bravado against villains the likes of which you’ve never faced before, and let the dragon hunt begin!

The Auburn Desolation is a forsaken waste of treacherous sand and unbearable heat within the Shadowfell. Gloom-wrapped serpents and foul undead haunt the wastes, striking out at unsuspecting travelers from sandy graves. Pgs. 88-95

A cadre of githyanki has come to the world in search of rich plunder and soft targets. It has set up a base in the lower levels of an abandoned fortress ruin. A caravan of travelers spotted a githyanki while it hunted for food. Rumors of an invading army from the Astral Sea quickly spread through nearby towns, and the PCs have arrived to investigate. Pgs. 84-89

The Approaching Swarm is a short adventure for four 9th-level characters. The party can consist of any mix of classes, but it should include at least one character that is good in wilderness settings, such as a druid, ranger, or barbarian, and at least one cleric. This scenario should prove a reasonable challenge for characters from 8th to 10th level. The adventure takes place in a swampland that is near a small settlement. The characters attempted to cross back through the swamp to their base of operations. Along the way, they may have got stuck in mud and probably were attacked by a variety of flying insects. They arrive just a bit too late to stop a massacre that occurred back at Crivdall -- the fort is ruined and it appears that almost everyone is dead or missing. Aleretheral, an insane half-orc druid who has mastery of vermin and insects, attacked Crivdall with his insects. He has often infiltrated Crivdall by posing as a harmless elf hermit who lives in the wood. In reality, he wants the settlers destroyed and out of his swamp.

Stormcrow Company—an unsavory band of adventurers—haven’t been seen or heard from in years. Rumors of their accumulated wealth have spread far and wide, and if they have truly been slain, that treasure is just waiting for adventurers to come and collect it. But is anything ever as easy as it seems? Pgs. 10-28

A Brelish spy steals and defects with a powerful magic sword and the adventurer's have been hired to track down and recover the item. This adventure features a lengthy chase overland on horseback, on a train, and an airship. Along the way the adventurers will also have to deal with third parties seeking to recover the sword for themselves, such as Warforged agents of the Lord of Blades who have hired halfling mercenaries riding glidewings (pteranodons), and Emerald Claw raiders piloting an opposing airship. This adventure can be run stand-alone or as a sequel to The Forgotten Forge and Shadows of the Last War.

Oblivion is a town like no other. Situated in a hidden valley within a high mountain range and accessible only via air or a secret tunnel through the mountains, it has remained unknown to all except its inhabitants for uncounted centuries. What happens when a natural disaster exposes the town to the world and lets loose an ancient danger at the same time? Will the PCs aid those in need?

Something is killing people in Palebank Village, and if the party does not stop it they could be next.