A Secret Buried for an Aeon is About to Sprout! From beyond our dimension, a living seed has festered here for an aeon. Within it lurks the nascent form of Akavala, the Ravenous Tree, dread ruler of a shattered world and its carefully gathered and subjugated protectors. Two of these powerful creatures escaped into the underworld drawing champions and enemies from the complex societies found there. As the god-seed grows, the world creeps closer to its doom. Includes: Full adventure, a new patron, new spells, new magic items, the Living Weapons of the Empire of the Thal, and many many new monsters. Published by Mystic Bull Games

While sitting around your favorite tavern, a loud explosion shatters the serene mood of Moscow. You sprint to the source and discover the distillery has exploded. The glum populace grumble loudly. With winter setting in and nothing to do the citizens rely on the libations from this business to cheer them up. You are approached to scour the canyon area before the winter sets in to find a few extra kegs for the people.

"A murderous laboratory comes to life in this adventure for 5th level characters." The players are tasked with investigating the disappearance of a mage who has been creating an A.I.-like arcane Workshop. Through the adventure, the PCS will soon learn that the A.I. has taken over and is using magic beyond it's understanding, having never ventured out into the world. How will the PCs stop a naive yet dangerously magical A.I. determined to get out into the world?

Prison of the Hated Pretender is an introductory adventure for 4-6 characters levels 0-1. Originally published on the Dungeon of Signs blog, it is a short drop-in location-based adventure with a couple of interesting puzzles, a lack of "book" monsters, implacable foes with an obvious weakness, and a very weird roleplaying opportunity. The new 2020 edition republished by Hydra Collective adds suggested guidance for new Dungeonmasters who grew up with 5th edition and don't know how old-school works. Stats for both BECMI and 5th edition, and setting neutral (though there are some implied things about the history of the world).

You are hired by a merchant to protect a rare item, a crystal crown, for one night against the attempts of the city's thieves guild. The arrogant guildmaster has informed the merchant that he will steal the crown and he cannot be stopped. Continues in Part 2 in Polyhedron #23 Pgs. 13-20

An ancient cave, defended by ancient death traps and weird arcane seals conceals the antediluvian vault of an archlich whose reign predates recorded history. Undisturbed for untold eons, the vault now stirs thanks to the machinations of cultists who have meddled with secrets best left undisturbed... This module sends the heroes to an ancient cave occupied by cultists dedicated to the Mists of Madness. Defended by ancient death traps and weird arcane seals, the caves conceal an antediluvian vault, the resting place of an archlich whose reign predates recorded history in the Known Realms. Undisturbed for untold eons, now the machinations of the cultists and their eladrin master threaten to awaken the archlich, to dire ends that none can predict.

Can Seapoint Be Saved?” is an adventure designed for use with the AD&D rule system. To be able to answer that question, a party of adventurers should consist of 4-8 player characters, each of 4th-7th level. The group may also include henchmen and hirelings. To have the best chance for success, the party should include as many different character classes as possible, with emphasis on fighter-types.

An oasis exploration and lava-filled obsidian dungeon crawl for 4-5 players of 5th to 6th level. Battle elemental evils, save captured sandworms, claim unique elemental magic items. A malevolent and ancient elemental lies imprisoned within a lava-filled obsidian cavern. Explore the hidden passages before his shackles break and havoc is unleashed upon the nearby oasis! 10 pages of oasis exploration and lava-filled dungeon peril! Statblocks for the life-cycle of desert sandworms, plus three unique elemental magic items like "Summer's Bane" - an armlet of compacted ice that grants the wielder a magical bow, and the "Embershard" - a dagger made from the jawbone of a red dragon that imbues the wielder with elemental magics. Run the adventure your way - drop the PCs off at the dungeon entrance and explore the perlious cavern, or let them cavort in the oasis before uncovering the lingering threat. We hope you enjoy the desert oasis and obsidian-carved dungeon crawl from the Heart of Arcana.

This dual offering is a true solo (no DM needed), as well as, the same dungeon for a PC/DM setting. The adventure is for new players at the lowest level of experience. It is centered on a recent discovery of an old dungeon that belonged to an arcane wizard. With no one to rely on, is your PC ready for a dangerous delve?

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?

For the past 5 years this elven village has been plagued by undead creatures of the nearby swampland. The undead are consisted of unlucky elf villagers or travelers who were foolish enough to walk through the swampland. It is unknown how the undead appeared in the swampland in the first place, but it is rumored that a demonic entity has found shelter in a cave inside the dark forest next to the swampland and it is being worshipped by necromancer cultists. This adventure is for parties no larger than 5 characters and no higher than level 5.

The Vault of Pallon the Pious is an adventure for four 2nd level PCs. A famous pirate captain came to worship a lawful god in his final years. After a lifetime of plundering, pillaging, scuttling, and murdering along the coastline, the fear-inspiring Pallon the Merciless rebranded himself as Pallon the Pious. But, a history of violence is a hard thing to reconcile, and the salty old dog slowly succumbed to madness. His most precious possession was a set of scales that reflected perfectly his own inner conflict. The Scales of Misjudgement are buried deep in the treasure room of his crazed rock-island vault.

Just Add Water is a sewer-based dungeon crawl that can be easily inserted into any adventure. All you need is a location with a sewer system and a reason for the party to explore it.

While resting in the merchant City of Gurdikar, a merchant approaches the party to investigate the disappearance of his nephew, whom he believes was betrayed by a rival house. The party must go into the into the mountain valley to find the missing nephew, return him if alive and discover any evidence of suspected treachery. Pgs. 43-51

The Saint's Tomb is a single-player gamebook-style adventure that is playable in your browser. You make a 1st level character sheet, roll your own dice (though 2 of each are supplied in-browser), keep up with your inventory, spells, and HP, and click on options as you make decisions. It was written to help new players learn the game, but it should be fun for experienced players too. In the game, you'll investigate a mysterious figure who has a suspicious interest in the tomb of a dead priest. You'll battle the undead, figure out problems and roll the dice to save your city! The Saint's Tomb is free, though you can leave a tip if you're able by clicking "Support this Game". A Spanish translation is available as "La Cripta Sagrada"

In the fourth installment of the Into the Underdark adventure series, characters come face to face with the heretofor unseen puppet master behind most of the strife and chaos in the Shadowed Hallows, Gyldrith the Chosen, a dreaded deep dragon! Includes: Three all new maps of Gyldrith's lair, and those of her minions Two all new monsters, the Ancient Deep Dragon and her Warlock of the Deep Dragon A new player option, the Deep Dragon patron for the Warlock Class. Unnumbered maps suitable for use in your favorite VTT Continues the story from Into the Underdark Part 1 - The Descent with areas and NPCs from The Shadowed Hollows Gazetteer

Sightings of a large Green Dragon have become more and more frequent and the shipping lanes are becoming regular targets. The duke has sent a military contingent but no word has come from that group. Is your party ready to lend a hand against an extremely dangerous foe?

Magical trinkets, unusual creatures, strange and mysterious artifacts, and more can be had at a discount at Gwen's Relics on Church Street. Now, the store's most outrageous acquisition has arrived, and the resulting chaos threatens to destroy the shop and release a plague of monsters into the town. Can the PCs stop the catastrophe before it spreads too far? What happens when a vagabond finds a weird snake down by the river and gives it to the local curio shop? Find out in "The Menagerie," winner of the Origins/DUNGEON Side Trek Design Competition. Pgs. 78-83

Eons past the fabled sorcerer-kings of Parhok perished in a rain of eldritch fire. But legends hold that one tribe survived the apocalypse, fleeing with their slaves to a hidden city, where the greatest enchanters of all time could sleep away the centuries, and awaken in a future age as rulers of a ruined land. Now once more the forbidden spells of the Parhok threaten the good folk of the Known Realms. A kingdom lies ensorcelled, a royal family ensnared by the forgotten dweomers of a long-dead race. When the best attempts of seers and diviners have failed, it falls to the heroes to save the kingdom. Have the sorcerer-kings risen to reclaim their bejeweled thrones? Or has a more sinister power bent their ancient magics to its sinister will? Only the most courageous and cunning of heroes will emerge victorious from Dragora’s Dungeon.

Sometimes things are not what they seem. While the PCs are sailing through pirate-infested waters, a crewman spots the floating wreckage of a sailing ship. Two survivors are standing on the deck waving frantically. The survivors — an eccentric old man, and a noble woman, claim to be merchants from Waterdeep, but are in fact pirates. During an attack on a merchant vessel, the old man, a mage, had missed with a fireball and hit their own ship causing serious damage and killing several crew mates. As punishment, the pirate leader left them marooned on the wreckage, taking the ship they had attacked. This is a short module focused on roleplay. Combat is unlikely as the pirates have no reason to attack or threaten their rescuers. The female survivor seeks a hidden treasure, which could provide a hook for ongoing adventure. While the module isn't explicitly written for solo play, it could be easily adapted for any group size provided the power balance between rescuer and pirate is maintained. Pgs. 24-25