Impossible Experiments is a series of adventures, each spanning 1-2 levels. Each volume can be run individually or combined into an ongoing series. This volume establishes the premise of this series… When the wizard-king Nex retreated into his Refuge over 4,000 years ago, speculation ran rampant as to what he would do in this space. At first, many assumed that he was restrategizing for the war with Geb, but as the decades and centuries ground on, wilder hypotheses were offered. One explanation claimed that Nex was experimenting to develop a new generation of magical warriors, spies, and minions whose presence would overwhelmingly tip the scales of war against Geb, and likely other nations to follow. In recent years, the gates to the Refuge of Nex have opened, and strange creatures have emerged. Indeed, these creatures are prototypes that Nex is evaluating. Near the iruxi-founded town of Gitna, one of Nex’s first prototypes has emerged and begun to claim victims. The guard has been raised in Gitna, and the heroes are now called to fulfill their oath to defend the town by helping one of its behir guardians, recently injured in his own fight... This adventure includes two archetypes, a versatile heritage, backgrounds, and items you can offer to your players to make this adventure your own!

Volunteers are needed to escort the body of a deceased venture-captain across the parched Qadiran desert to Katheer. The Silken Caravan offers passage, hauling exotic treasures across the perilous sea of sands. You'll brave bandits, spies, and unwelcome mourners hell-bent on paying respects to your dead companion. Worse still, the caravan's mistress, a satin-swathed Qadiran princess, has designs of her own on you and your cargo.

Alkenstar, City of Smog, is a bastion of civilization in the magic-warped region known as the Mana Wastes. Its ingenious citizens survive in the treacherous Spellscar Desert with the help of canny inventions like guns and clockwork automatons, but now their construct protectors have begun to run amok within the city. It falls to the PCs to venture beyond the city walls to find the source of their strange behavior.

The witch queens of Irrisen must abdicate their thrones every 100 years when their mother, Baba Yaga, places a new daughter on the throne. But one queen was unwilling to relinquish her rule, and led a doomed rebellion against the Mother of Witches. Afterward, Baba Yaga entombed her wayward daughter in an icy necropolis known as the Veil of Frozen Tears, along with a powerful artifact called the Torc of Kostchtchie, hiding them both far from mortal eyes. Now, almost 500 years later, the tomb has been found, and the race is on to plunder its treasures.

The Thrice-Damned House of Thrune wants to seal the Inferno Gate, an uncontrolled portal to Hell, and the villainous adventurers are called to accomplish the task. To acquire the components and perform the ritual, they must first face down a hellspawn thieves' guild, the Hellknight Order of the Pike, and the knights of the Glorious Reclamation and their celestial allies. But before they can complete the ritual, the characters may be forced to examine their options—is closing the gate the best plan for the future? Will the villains obey their orders to close the gate to Hell—or might they make a deal with a devil for control of the portal? Or will they only become the latest in a long line of sacrifices to the Inferno Gate?

The city of Westcrown is dying. Since being stripped of its station as the capital of Cheliax, the wealth and prestige of the city has gradually slipped away, leaving the desperate people to fend for themselves in a city beset by criminals, a corrupt nobility, and a shadowy curse. Can the PCs fight back against champions of both the law and the criminal world? This volume of Pathfinder Adventure Path launches the Council of Thieves Adventure Path, and includes: - "The Bastards of Erebus," a Pathfinder RPG adventure for 1st-level characters, by Sean K Reynolds - A gazetteer of Westcrown, the shadow-haunted City of Twilight, by Steven Schend - An investigation into the lives of tieflings, along with hundreds of fiendish variations, by Amber Scott - A deadly mystery of nobility and intrigue for Pathfinder Varian Jeggare and his tiefling bodyguard Radovan in a new series of the Pathfinder's Jounal, by Dave Gross - Six terrifying new monsters by Mike Ferguson, Sean K Reynolds, and F. Wesley Schneider

The deep waters of the Hellmouth Gulf have long concealed ancient mysteries, both wondrous and terrible. But these secrets have been submerged for too long, and the remote coastal village of Blackcove has accidentally awoken a slumbering horror from a bygone age. Strange creatures now venture from beneath the waves to steal townsfolk away in the dark of night.

The adventurers now have their own island and port, but they’ll need more than one ship to defend it. When a past rival sends a fleet to attack them, they’re forced to pull out all the stops to defend their island home, scouring the harbors and docks of the Shackles in order to recruit more ships and crews to their flag. Yet when they sail to the attacker’s own island to get their revenge, the adventurers discover a traitor—one whose betrayal threatens not only their own fleet, but the very islands of the Shackles themselves. This volume of Pathfinder Adventure Path includes: • “The Price of Infamy,” a Pathfinder RPG adventure for 11th-level characters, by Tim Hitchcock. • Fleet battle rules that allow players to stand as admirals and commodores directing their own armadas against enemy fleets in large-scale naval warfare, by James Jacobs. • A glimpse behind the gray veil of Norgorber, Golarion’s most secretive deity, by Sean K Reynolds. • Lock-breakers and sea-devils in the Pathfinder’s Journal, by Robin D. Laws. • Four new monsters, by Savannah Broadway, Ryan Costello, Mark Moreland, and Sean K Reynolds.

For ages, the House of the Beast has loomed, black, ominous, and abandoned, a fortress of depravity raised by followers of the god of destruction. Now, a new evil has taken root within the dark citadel and the beastmen of the Carrion King threaten to cast the land into a new era of savagery. Only a strike against the murderous warlord himself can topple the ravenous gnoll war machine, but such a bold assault means a raid on the House of the Beast itself. Do the PCs dare enter the crumbling halls of this accursed fortress? And what treasures lie within the ruins’ depths that even the merciless Carrion King fears to claim? This volume of Pathfinder includes: ◆ “House of the Beast,” an adventure for 5th-level characters, by Tim Hitchcock. ◆ A gazetteer of the Pale Mountain region, a savage land of unconquerable mountains, mythical beasts, and ageless treasures, by Steve Kenson. ◆ The word of Sarenrae, goddess of the sun, redemption, and healing, along with details on her beneficent followers, by Sean K Reynolds. ◆ Accused of murder, Channa Ti races to reveal a killer in the Pathfinder’s Journal, by New York Times bestselling author Elaine Cunningham. ◆ Five new monsters by Adam Daigle, Tim Hitchcock, Robert McCreary, and Sean K Reynolds.

Book 4 in the Iron Gods campaign: A great threat is rising in Silver Mount, but a precious item belonging to a mysterious entity called Casandalee has yet to be found. With the Dominion of the Black still an ever-present danger, players must navigate a dangerous canyon, the Scar of the Spider, in hopes of learning more about their enemies, and to accomplish their mission.

Hakotep’s flying pyramid has been grounded, but the heroes must enter the ancient tomb to deactivate the fleet of smaller flying pyramids poised to attack cities across Osirion. Deep inside the Pyramid of the Sky Pharaoh, an untouched tomb from the heights of Ancient Osirion, the heroes face undying guardians woken from ageless sleep, culminating in a final battle with the reborn Sky Pharaoh Hakotep himself. Will the heroes defeat Hakotep and reunite the pieces of his sundered soul to send it into the Great Beyond, or will Osirion enter a new age under the rule of a mummified pharaoh from the distant past? This volume of Pathfinder Adventure Path concludes the Mummy’s Mask Adventure Path and includes: - “Pyramid of the Sky Pharaoh,” a Pathfinder adventure for 15th-level characters, by Mike Shel. - A detailed look into the questions of the afterlife, judgment, and the nature of souls, by F. Wesley Schneider. - A collection of plots and intrigues to expand the scope of the campaign, by Adam Daigle. - The exciting conclusion of “Shadow of the Sands” in the Pathfinder’s Journal, by Amber E. Scott. - Five new monsters created by Tyler Beck, F. Wesley Schneider, and Mike Shel.

Part 5 of the Carrion Crown Adventure Path takes place in Ustalav's capital Caliphas. The heroes are in the city to follow the trail of evidence left by the neromantic cult The Whispering Way and strengthen their bonds with the mysterious Order of the Palantine Eye. Whilst in the city, they uncover a string of murders. When they discover that all the victims were vampires, they descend into the underground vampire city and have the possibility to form a tentative alliance with the vampire clans. If they help solve the murders, the vampire lord promises to help them on their quest. What role do the deadly necromancers have in the undead murders plaguing Caliphas? What secret grudge exists between the cult and the rulers of the night? And will the heroes be able to save the capital without sacrificing their very souls? This book includes: - “Ashes at Dawn,” a Pathfinder RPG adventure for 11th-level characters, by Neil Spicer - A gazetteer of fog-haunted Caliphas, the mysterious and deadly capital of Ustalav, by F. Wesley Schneider - A terrifying look into the blasphemous church of Urgathoa, goddess of gluttony, disease, and the undead, by Sean K Reynolds - Laurel Cylphra’s attempt to steal a soul stealer in the Pathfinder’s Journal, by F. Wesley Schneider - Six new monsters by Crystal Frasier, Patrick Renie, and Sean K Reynolds

When strange reports of misty undead spread through Absalom, you and your fellow Pathfinders are dispatched to the half-drowned district of Puddles. Notoriously rough, the drooling addicts, flesh panderers, and quick-handed knifers of Puddles are the least of your worries. The night's tide brings with it an ancient armada of some long-forgotten war and you are the only thing between their mist-shrouded ghost fleet and Absalom's utter oblivion.

Her Infernal Majestrix Queen Abrogail II of Cheliax summons her agents to the city of Egorian to address the current crisis with the Glorious Reclamation. Upon arriving in the bustling capital, the adventurers find themselves swept up in the cutthroat politics of the imperial court. To impress the queen and secure a royal audience, the wicked characters must scour the City of Thorns to root out and eradicate a secret organization that works to free halfling slaves. But to truly earn Queen Abrogail's trust, the adventurers must perform a sacrifice for the queen to renew House Thrune's contract with Hell, and there are many—both within the court and without—who wish to see the monarch dethroned.

Panic grips Absalom when a huge crystalline sailing vessel appears suddenly in the harbor. Identified as the King Xeros of Old Azlant, the ship presents a great opportunity for the Pathfinder Society. You and your fellow adventurers are summoned by Venture-Captain Adril Hestram and dropped aboard the King Xeros to explore it and report back. Only, what you find isn't an empty vessel, but a sinister ship with a vile intent. Difficult and unforgiving scenario, typical of Greg A. Vaughan. Contains lots of monsters from the Ethereal Plane and a mysterious setting. If playing under Pathfinder Society rules, a six-player party is recommended, rather than the standard four for early PFS seasons. Using Pathfinder RPG versions of monsters reduces the lethality, as the constructs are no longer immune to critical hits and sneak attack damage, and the Xill no longer automatically bite for paralysis on a maintained grapple.

While the lives of most Pathfinder Society field agents is brutal and short, some rise to prominence, drawing the attention of the Decemvirate. These lucky agents are invited to a little known siege castle outside Absalom where they are asked to test their mettle. Those who succeed get their choice of prestigious missions, whereas those who fail are rarely heard from again. The players are run through an arena-style dungeon, faced with monsters, traps, and puzzles.

The Abyss Approaches! Something wicked—and monstrous—stirs around the rugged Isgeri town of Saringallow, where the hated legacy of noble Chelish diabolists runs deep. With the recent disappearance of several apprentices, the nearby menace of particularly grotesque goblins, and the unsettling rumors about the old Sarini Estate, Mayor Sandra Trinelli knows that she needs help, and she needs it fast! The heroes must confront one of these crises, or all three, if they hope to stem the tide of darkness that looms. Before too long, the heroes discover that villains with ties to the Abyss have set their sights on Saringallow, and won't rest until the settlement and all its innocent inhabitants fall victim to their madness-inducing predations! Gallows of Madness is a 64-page, highly versatile collection of three adventures for 1st-level characters. Each adventure also includes scaling information for parties of 2nd-level characters. Written with beginning Game Masters and players in mind while also providing challenging content for veterans, these adventures can be prepared quickly and run separately or in any order. For GMs who wish to run a deeper, more narrative game, this volume also offers an overarching timeline of events and detailed tips for running these adventures as a cohesive whole. Bonus content includes new monstrous foes and a gallery of NPCs to help easily connect the adventures, plus a gorgeous double-sided poster featuring an overview of Saringallow and a miniatures-scale battlemap!

Now that the ruined pyramid tombs of the ancient emperor-gods of Osirion are finally open to exploration, the race is on to plumb their depths and rescue their priceless treasures. Entombed with the Pharaohs is a desert adventure written by Michael Kortes that pits players against rival adventurers bent on getting to the treasure first as well as the vicious monsters and lethal traps set to stop them from their plunder. Ancient secrets and wealth beyond imagination await you in the pharaohs' tombs—will you be the first to find them?

Deep in the forest, something is stirring. An evil fey sorcerer, cast out of the First World millennia ago by her own kin, has found a way to break through the ancient walls of her prison, and carries with her a vengeance too deep to be sated. For the quiet Andoren town of Bellis, busy celebrating a long-awaited marriage, it's a time for joy and laughter. Yet the forest that's always sheltered it is growing dark, and things are moving in the heart of the woods...

The Rise of the Runelords Adventure Path begins here, in the small coastal town of Sandpoint. Five years after a tragic fire and spate of brutal murders, the people of Sandpoint eagerly anticipate the Swallowtail Festival to commemorate the consecration of the town's new temple. At the height of the ceremony, disaster strikes! In the days that follow, a sinister shadow settles over Sandpoint. Rumors of goblin armies and wrathful monsters in forgotten ruins have set the populace on edge. As Sandpoint's newest heroes, the PCs must deal with treachery, goblins, and the rising threat of a forgotten empire whose cruel and despotic rulers might not be as dead as history records.