In the aftermath of AD&D Second Edition's "Return to the Tomb of Horrors," the demilich Acererak was thought destroyed. In truth, his spirit lingered and now after eons he schemes once more to achieve divinity. The characters must travel to three extraplanar dungeons, in addition to the remains of the original Tomb, in order to stop this from coming to pass.

A pall hangs over the frontier town of Wellspring, casting this once-vibrant place into corruption and death. Strange people stalk the streets and unexplained murders occur each night. Nagging fears that more horrors will spill forth from the Kadagast Mountains instill a pervasive paranoia within the townsfolk. Suspicious people watch their neighbors, and temple attendance has never been higher. Folk keep to themselves, hiding in their homes. They avoid darkened streets, lock their doors when night falls, and shutter their windows to close out the screams and shouts echoing in the dark. If the grim threats pressing the town are not stopped, the fl ame of Wellspring might very well flicker out.

Kravenghast Necropolis is hidden in a valley that was formerly part of a now dead city. It consists of a small cemetery that sits atop an abandoned necromancer's laboratory. The necropolis has been refitted as a temple to Vecna, the undead God of secrets. The mausoleum in the cemetery contains a secret spiral staircase that leads to the underground laboratory. The temple is populated by a twisted cult of Vecna, led by the lich-priest Mauthereign. Pgs. 96-103

In times ancient, an infamous paladin-artificer named Khaldun unearthed a cursed tome bound in the flesh of the first medusa. Driven to madness by its secrets, he used the necromantic magic contained within to call forth an army of dread warriors from the Netherworld. Though his assault was devastating, he was ultimately unsuccessful, and the mightiest crusaders of the realm banished Khaldun to the Netherworld, where he would rot for eternity at the bottom of the River Dis. Unfortunately, rather than perishing in that bleak plane, Khaldun escaped his silt grave and thrived, amassing a legion of undead followers and erecting a Tomb in which he could perfect his mechanical craft without interruption. It was not long before he shed his body and became a demilich. After several centuries of scheming, the undead warriors under the command of the ‘Iron Lich’ have burst free of the Netherworld, laying waste to not only the mortal kingdoms that exiled him, but also the exalted domains of the gods themselves. The crusaders’ quest is simple – stead the Tomb and destroy the Iron Lich. Published by Defy Danger and Save Versus Death

At Restwell Keep, you've heard that fortune and glory await those bold enough to brave the dangers of the Chaos Scar, a valley carved ages ago by a fallen star. The same tales warn that this Chaos Scar draws wickedness to it. Perhaps you can help stem this tide... and gain treasure along the way. While the location is a different keep, this adventure is an homage to B2 Keep on the Borderlands(https://adventurelookup.com/adventures/b2-keep-on-the-borderlands)

The Raiders’ Hideout is a series of underground chambers (or perhaps the interior of a pyramid) that serves as a base of operations for a band of gnoll desert raiders. The PCs have come to exact a measure of justice for recent brutal caravan raids. They’ve tracked the gnolls to their lair, where they intend to end the threat to desert trade once and for all. Pgs. 30-35

The Bloody Maul of Kord is a magic weapon protected by the priests of Kord, who occasionally allow a noteworthy hero to use it when going on a dangerous quest worthy of the storm deity’s blessing. Six months ago, Atrimos of Ardor took the Bloody Maul for a quest to the Caverns of Demise, hoping to end attacks to the realm being launched from the caverns. He never returned. Now, the clerics of Kord hire the PCs to go into the caverns to retrieve the Bloody Maul of Kord—and to find Atrimos, if possible. Pgs. 108-113

Centuries ago, the four deities worshipped by mortals – Kishar, Kotaresh, Lyth, and Asar-Segt – threatened to drown the world in a flood of saltwater to punish the living for their impiety. The oracles and witches of the realm struck a desperate bargain with the gods, however, and convinced them to spare the world. In exchange, the mortal kingdoms were bound to demonstrate their faith once every generation by sending their most courageous and adroit warriors to the Crucible, a ziggurat in the lowest valley of the land. Every quarter-century, on the first full moon of summer, an eclipse darkens the night and the sealed ziggurat opens. Many traps, tricks, and guardians lie within the Crucible to test those who enter. Few who heed the challenge of the gods survive – most find only quick death. If the races of the world are deserving of the gods’ affection, their champions will overcome the trials of the Crucible and light the Divine Brazier hidden in its uppermost chamber. If they are not, the flickering candle of civilization will be snuffed. Little of value will have been lost. Published by Defy Danger and Save Versus Death

As the story goes, worshipers of Bahamut and worshipers of Gruumsh spent years warring. As the dead piled up, a Bahamut faithful crafted a weapon of devastating power. Most of the inventor’s peers balked at its use, but some felt it was justified. Those few who used the weapon were twisted into mad, dark beings by its corrupting power. The rest of Bahamut’s flock locked them and the weapon away in a dungeon prison. The dungeon and its terrible secret were long forgotten—until a group of rakshasas happened across the ancient tale. Now they seek the weapon for their own designs. Pgs. 132-137

The outpost of Fort Dolor has experienced an unprecedented stretch of peace in recent times. Then nearly the entire garrison disappears on a supposed routine patrol, and the town— still on the frontier— is left nearly defenseless. Can the adventurers dig to the bottom of the mystery at Fort Dolor before they, too, disappear? Pgs. 82-103

Wicked forces conspire to usurp the power of the Raven Queen, god of death, by unraveling the foundations of reality. To prevent this cosmic coup, mighty heroes must survive an epic journey into the Shadowfell's timeless core, where all things find their end. The beginning of the end of the original 4th edition adventure path (although ties are very light to the heroic and elite tier adventures). The PCs must first prove themselves worthy to act as the Raven Queen's agents. They will then be sent to Death's Reach, a graveyard and dumping ground from the Dawn's War. There, they must fight through the Black Star Host- powerful elemental beings, to prevent Orcus was resurrecting a primordial, Timesus the Black Star. One notable encounter is a random encounter with the Worm of Ages. This huge worm has the ability to swallow and rules for moving creatures from its maw to its throat, gullet, and into the stomach.

You will take up the mantle of heroism in a grim world where simple survival cannot be taken for granted. These heroes will shape the world of Athas while they grow in power and prestige - or die trying. Your character has been asked to aid a secretive faction of the Veiled Alliance in the Free City of Tyr against an unknown assailant. Ashes of Athas is a 4e D&D campaign set in the world of the Dark Sun campaign setting.

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

While camping in the wilderness, the characters find a tracker surrounded by wolves. Once the heroes dispatch the beasts, the tracker reveals that she is seeking aid in the fight against the darkness enfolding her community, Silver Lake. Should the characters help, they find the village terrorized by lycanthropes that hail from a tiny island rising from the mist-shrouded lake.The island is a fey crossing, and heroes who set foot on it find themselves in the Feywild, where a war is brewing; the lycanthrope clans are at each other’s throats, and many are turning their feral eyes outward to the rich lands beyond their secluded valley. To avert an unimaginably savage war, the heroes must rescue a werewolf lord from his captors and expose the conspiracy that threatens to drench the Feywild in blood...

A group of mysterious, sea raiders— capable of appearing from out of nowhere, striking, and disappearing— has terrorized a group of coastal states for some time. Now the leader of the states has asked the characters to infiltrate the raiders, find out how they operate, and put a stop to their activities. But once the heroes join the raiders, things aren’t as clear as they were led to believe. Will they succeed at their mission? Or join the raiders themselves? Pgs. 54-82

A slaver gang known as the Bloodreavers are terrorizing the countryside from their base deep in the labyrinth under Thunderspire Mountain. But these slavers are only the symptom of a larger threat in the bowels of Thunderspire.

A cold winter wind blows from the Scourge Mountains, but its origins are not of this world. And with it come horrifying stories of a fey who walks the land. Cold, beautiful, and deadly, she turns every mortal she touches into a statue of ice, and she seems determined to blanket the entire north in a blanket of frost. It is the Winter of the Witch…and if the archfey Koliada is not stopped, it could be the world’s last. “Winter of the Witch” starts with the PCs receiving an urgent but somewhat cryptic message from the skeletal knight, Sir Keegan. They find the skeletal knight a helpless victim of an aggressive interrogation by an undead minion of Orcus and his demonic thugs, who are attempting to extract the location of something called the Sun’s Sliver from the stubborn knight. The PCs fight their way into deep ruins, defeat the demon lord’s toadies, and retrieve the Sun’s Sliver. Once the PCs have recovered the Sun's Sliver, they must confront the Winter Witch in Winter's Heart, the witch's icy sanctum in the Feywild. Only there can they confront the cold-hearted archfey and save a section of the world from a wintery doom.

Stonefang Pass wends its way through the mountains of the Stonemarch, home to brutal tribes of orcs. The time has come to clear the pass and gain a foothold, so that it can be used for trade between the town of Winterhaven and the lands beyond the mountains. Brave adventurers are needed to rid the pass of monsters and liberate Stonefang Keep from the orcs. Who’s up for the challenge?

Ages ago, the tower stood as a bastion against banditry and marauders. But civilization has long since retreated from this area, and a band of goblin thieves has taken up residence in the ruined tower. Local woodsfolk beg the PCs to rid the place of the bandits before they are victimized again by the goblins of the Broken Tower. Pgs. 18-23

A short mystery adventure with only two combat encounters: An archfey has placed a curse on a small hamlet, putting all the adults to sleep. The PCs must talk to the children to learn what's going on. When they get too close to figuring it out, boggles attack. Eventually the PCs realise they have to compose a short verse of poetry to wake the adults. When they do, an avatar of the archfey attacks in one last attempt to stop the PCs.