Spawns of the Mindrender: Descent into Madness

We have always felt that madness is one of fantasy roleplaying’s most evocative themes, and one of the most overlooked by the generic 5e rules, where it is often reduced to a single saving throw followed by a random effect. We wanted something more focused: a dedicated, usable rulebook that turns psychological deterioration into a meaningful game mechanic.

When the Spawns of the Mindrender campaign ended and we started writing the adventure, one thing became clear: our ideas for madness had grown far beyond what a single adventure could contain. We wanted to create an expansion that could stand on its own as a complete supplement dedicated to the theme of madness.

Welcome to Descent into Madness, a D&D 5e-compatible expansion that delves into the horrors lurking beyond the fragile veil of sanity. In most adventures, the greatest threats are those you can see coming: a sharpened blade, a lightning bolt, a gout of dragonfire, or the claws of some monstrous foe. But in the shadowed corners of the Multiverse, far greater dangers lurk beyond the veil of sanity, and the true enemy is the Fracture — the slow, creeping realization that the universe is indifferent, alien, and hungry for your mind.

Whether you are a Dungeon Master looking to infuse your campaign with a sense of genuine psychological dread, or a player eager to portray a hero harnessing their own inner demons, this 150-page supplement provides the mechanical depth and narrative flavor to make every "Wisdom Saving Throw" feel like a fight for your very soul.

Prepare yourself. The descent is steep, the darkness is infectious, and the truth is often far more terrifying than the lie.

Descent into Madness is an expansion for Spawns of the Mindrender, our 600-page D&D 5e-compatible adventure module set in the harsh mountain region of the Vordan campaign setting.  

Learn more about the campaign and explore the full scope of Spawns of the Mindrender on the campaign page.

ALREADY BACKED SPAWNS OF THE MINDRENDER?

Descent into Madness is an ideal companion to the campaign you already backed. It expands its central themes with dedicated madness mechanics, psychological-horror options, and reality-bending content you can use throughout Vordan.

🧙‍♂️ Coils of the Worm Undying by Ed Greenwood

We are thrilled to welcome Ed Greenwood, legendary creator of the Forgotten Realms, to both Mindscape One-Shots and Spawns of the Mindrender with an exclusive adventure: Coils of the Worm Undying. 

Deep within a mine overtaken by aberrant horrors, adventurers must confront a manifestation spawned from the lingering spirit of an ancient entity and venture into the dead body of the Worm Undying, where the rules of reality begin to disappear.

The adventure was shaped entirely by our community through a series of polls. Backers chose its bizarre inside-an-organism setting, its aberrant monsters, and a mysterious magic item centered on summoning and dimensional travel. Ed Greenwood then transformed those ingredients into a complete adventure, making Coils of the Worm Undying available FREE to all backers.

🧠 The Rules: Cracking the Psyche

Madness should be more than a single saving throw followed by a random effect. Descent into Madness introduces a comprehensive system that allows psychological deterioration to accumulate, escalate, and influence play, while staying logical, manageable, and easy to incorporate into any campaign. 

Triggers and Consequences 

A Trigger occurs whenever a character reads, sees, hears, touches, or interacts with something that can damage the mind. Each Trigger narrows the possible forms of madness it can cause, drawing from a focused selection of contextual outcomes. 

Accumulating Insanity Points 

When a character is exposed to a Trigger, they make a Wisdom saving throw. Depending on the effect’s severity, failure can inflict 1 to 1d6 Temporary Insanity Points, Permanent Insanity Points, or a combination of both. Truly overwhelming experiences may inflict a smaller number of points even on a successful save. Insanity Points are cumulative. Each Temporary Insanity Point extends the duration of the disturbance, while Permanent Insanity Points remain until properly treated. 

Stages of Madness

Each source normally inflicts a specific madness, though characters can gain multiple afflictions from different sources. As Insanity Points accumulate, each madness progresses through three increasingly dangerous stages: 

• Fraying: Insanity Points equal or more than the character’s Wisdom modifier. 
• Fractured: Insanity Points equal or more than half the character’s Wisdom score. 
• Shattered: Insanity Points equal or more than the character’s Wisdom score. 

Every stage introduces different effects. Certain events can also trigger acute Episodes, producing flares of rage, confusion, terror, incapacitation, and other dangerous conditions. 

Treatment and Recovery 

Madness can be treated through therapy, requiring time and skill, or through magic. Different spells remove different amounts and types of Insanity Points rather than instantly eliminating every affliction. As a character’s Insanity Points decrease, their madness recedes through its stages until it can finally be overcome. 

The complete sourcebook includes extensive Trigger and outcome tables, detailed descriptions of every affliction and its stages, Elisode effects, Insanity Point guidelines, therapeutic treatments, spell interactions, and conversion rules—everything you need to make madness a comprehensive, usable part of your game.

👹 The Bestiary: Twisted Incarnations

Explore a bestiary of fourteen entities reimagined through the lens of psychological trauma. Face the Grieving Seraph that radiates soul-crushing despair, or the Mirror Dragon that traps victims in their own narcissism. Each creature type, from Aberrations to Undead, brings a unique mental infection.

🧝 The Classes: Embracing the Fracture

Twelve new Subclasses (one for each class) allow you to weave instability into your character’s power. Whether you are a Path of the Mythos Barbarian sprouting tentacles in a rage or a Way of Pain Monk who converts agony into psychic destruction, these archetypes turn mental conditions into tactical tools. Play as a Pathological Trickster who gaslights their foes or a Fractured Mind Sorcerer whose magic shifts between Manic and Depressive states.

🎭 The Personas: Tales from the Edge

Populate your world with a gallery of mentally unstable NPCs, each provided with a detailed backstory, unique behavioral quirks, and distinguishing traits. These profiles give DMs the tools to portray mental instability with depth and nuance, providing memorable allies — or terrifying cautionary tales — for your players to encounter in asylums, dungeons, and the dark corners of the world.

As with all Elderbrain projects, during the live campaign, you’ll have the chance to become one of these NPCs plagued by madness.

⚗️ The Substances: Alchemical Madness

Descent into Madness introduces new Substances — drugs, medicines, elixirs, and strange concoctions with powerful effects on body and mind.

Some sharpen the senses, suppress pain, or push the body beyond its limits. Others offer a precious temporary reprieve from insanity, restoring clarity when the mind begins to unravel. But such relief can come at a heavy price. Powerful substances carry risks of side effects, withdrawal, and lingering addiction, turning a desperate remedy into a dangerous dependency.

✨ Feats and Spells: Powers Beyond Reason

Descent into Madness features a collection of new Feats shaped by aberrant influence, forbidden practices, sacrifice, and minds pushed beyond their natural limits.

Become a Fractured Intellect, splintering your consciousness to confound telepathy, retaliate against psychic intrusion, and maintain your magic through sheer mental anguish. Or embrace the path of the Sacrificial Adept, gaining supernatural boons through carefully chosen offerings and sacrifices.

💉 The Arsenal: Tools for the Asylum

Equip your party with new Magic Items designed specifically for the descent into Madness rules. Distribute the Pacifier Jacket to contain violent threats, or risk your mind for the power of the Music Box of Madness. 

📥 Free Download

We believe in the madness we’ve created, and we want you to experience the horror firsthand. Download the Descent into Madness Sample PDF now. This teaser includes:

• The College of Discordant Tunes Bard subclass.
• The Mirror Dragon, a narcissistic true dragon.
• The Pacifier Jacker magic item that holds targets in place.
• The Essence of Halgark, a substance known for its mind-enhancing effect.
• The Dread Visage spell that instills fear in onlookers.
• The Fractured Intellect feat, designed to help you resist mind-affecting effects.
• Tynko Thristletoe, a wild-eyed halfling who claims the mountains whisper only to him.

[DOWNLOAD THE PDF HERE]

🎧 Free Soundscapes App

Immersion is everything. That’s why Descent into Madness is fully integrated with the Elderbrain Soundscapes App.

100% Free: Available in browsers, on desktop, iOS, and Android.

Dynamic Audio: We have composed dozens of dynamically changing soundscapes specifically for our adventures, including Spawns of the Mindrender.

[DOWNLOAD THE APP HERE]

🎁 Rewards 

Choose the perfect reward tier that matches your preferences. Whether you’re interested in just the sourcebook or the Spawns of the Mindrenderadventure as well, only digital products, or physical copies, or even premium bundles packed with accessories, there’s something for everyone.

For the ultimate experience, choose a reward tier that includes the books, maps, three booster card decks, DM screens, dice sets, VTTs, and other extras — or even the chance to become an NPC within the book!

🐦 Early Bird Rewards

Join the campaign during the first 48 hours and unlock extra rewards with your pledge!

• Physical Backers — Eldritch Metal d20
  Add an exclusive Eldritch Metal d20 to your collection: a weighty die forged for those willing to stare beyond the veil of sanity.
• All Backers — Complete Elderbrain Digital Token Pack
  Receive the Complete Elderbrain Digital Token Pack, featuring high-resolution VTT tokens drawn from across Elderbrain’s adventures — ready to drop straight onto your virtual tabletop. 

🧑‍🎨 Become Part of the Madness!

Become immortalized in Descent into Madness as an NPC! The book will feature custom NPC portraits based on backers’ likenesses, each hand-drawn by our talented illustrators. Take a look at some of our 300+ previous backers who were transformed into NPCs:

Choose the "Descent Hero Box" pledge level, choose from a list of 60 characters in the sourcebook, send us your photos, and we’ll bring your likeness to life as one of these vibrant NPCs! It’s a perfect way to celebrate your adventures or give a one-of-a-kind gift to friends and loved ones.

All featured NPCs will also be included in the Mentally Unstable NPC Card Deck, bringing their unique personalities and forms of madness directly to your table. Each card gives GMs a convenient reference, making these memorable characters easy to introduce whenever your adventurers encounter someone whose mind has been touched or shattered by forces that assail their sanity.

🛒 Products and Add-ons

Explore the darker side of adventuring with all our PDFs. Descent into Madness can form the foundation of the madness used throughout Spawns of the Mindrender, but it can also easily bring psychological horror and aberrant influence into any campaign.

The Descent into Madness PDF includes a 2024 (5.5e) Conversion Guide with updated statistics, plus a Digital Asset Pack containing all high-resolution art assets from the book.

Spawns of the Mindrenderputs these rules into action across an epic campaign in Vordan, supported by Player Options, the spoiler-free Vordan Gazetteer, Map Pack, Digital Asset Pack, and the 2024 Conversion Guide with updated statistics. 

The same level of support is provided for all our adventures — Crown of the Oathbreaker, Torrents of the Spellhoarder, and Scepter of the Lightbringer — however, the asset pack and conversion booklet are exclusive to Spawns of the Mindrender.

For those who love physical books at the gaming table or on their shelves, Descent into Madness and Spawns of the Mindrender are both available as beautifully printed hardcovers. These premium editions feature sewn binding, high-quality paper, and elegant ribbon bookmarks, built to withstand countless journeys into madness and become striking centerpieces of your collection. You can order our three previous adventures in hardcover from Elderbrain.comwhile supplies last.

Descent into Madness and all four Elderbrain adventures are available as optimized VTT editions. Descent into Madness, Spawns of the Mindrender, and Scepter of the Lightbringer support Foundry VTT and Roll20, while Crown of the Oathbreaker and Torrents of the Spellhoarder also offer select support for Fantasy Grounds and Shard. These modules are built for smooth digital play with features such as dynamic lighting, linked stat blocks, automated dice rolls, special effects, and custom tokens, bringing the books directly to your virtual tabletop.

The Descent into Madness and Spawns of the Mindrender DM Screens are magnificently illustrated 4xA4 panel screens, each packed with easy-to-find references tailored to their books. The Descent into Madness DM Screen puts the essential madness rules, mental conditions, and tables at your fingertips, while the Spawns of the Mindrender DM Screen features random encounter tables, rules for running the chaos of large-scale battlefields, a reference table for Shandar's madness, and a new collection of madness effects for your adventures across Vordan.

By popular demand, our physical bundle and Deluxe Box pledge levels, plus add-ons, include everything you need to bring Descent into Madness and Spawns of the Mindrender to life at the gaming table. 

Descent into Madness features three dedicated card decks: Booster Cards with substances, magic items, spells, and feats you can hand directly to players; Mental Condition Cards covering new forms of afflictions and fracture rules; and Unstable NPC Cards, a roster of ready-to-use characters touched by madness. You can also put your mind into every roll with the brain-inspired polyhedral dice set — a perfect thematic fit for Descent into Madness and Elderbrain.

For Spawns of the Mindrender, accessories include the Booster Cards, Eldritch Dice Set, poster maps, Vordan Scratch-Off Map, the complete Spawns miniatures set, and STLs.

Additional add-ons include the Mimic Siege Engine Dice Tower, VTT NPC and Monster Token Pack, Digital Assets Packs, alongside the Spell Wars party game bundle and Deck of the Hive Mind NPC cards — giving you even more ways to expand your collection and immerse your group in the world of Elderbrain.

Descent into Madness and Spawns of the Mindrender are both available as premium Deluxe Hardcover editions and spectacular Deluxe Boxes built for collectors in the "Deluxe or Hero Box" reward tiers. Each Deluxe Box combines the book and its physical accessories into one complete package, plus limited-edition collectibles such as exclusive art prints, a cover poster, a sticker sheet, and other campaign-specific extras. All Deluxe and Hero Box pledge levels also include the complete Spell Wars party game bundle and Deck of the Hive Mind NPC cards.

The Descent into Madness Deluxe Box collects the Deluxe Hardcover with its madness-themed accessories, including the Booster Cards, Mental Condition Cards, Unstable NPC Cards, custom DM Screen, brain-inspired dice set, and limited-edition collectibles. 

The Spawns of the Mindrender Deluxe Box (or "SOTM Deluxe Box") similarly includes the Deluxe Hardcover, Booster Cards, custom DM Screen, Eldritch Dice Set, art prints, a cover poster, and a sticker sheet, but also contains all poster maps, the Vordan Scratch-Off Map, and the Mimic Siege-Engine Dice Tower. The Descent + SOTM Deluxe Box pledge level also includes the full range of applicable physical miniatures and STL files for Spawns of the Mindrender — making it the ultimate physical edition for those who want the complete Elderbrain experience.

The Become an NPC reward is also available as an add-on, so you don’t need to commit to a Deluxe Box or a collection of physical accessories to join the cast of Descent into Madness. Otherwise, it's included exclusively in the Descent Hero Box pledge level, giving more backers an accessible way to have their likeness transformed into a hand-illustrated NPC — and immortalized in both the book and the Mentally Unstable NPC Card Deck.

🚚 Shipping and Fulfillment

We have partnered with reliable fulfillment centers to provide Friendly Shipping to the US, Canada, UK, EU, and Australia. When physical rewards are ready to ship toward the end of 2027, backers will receive an email with a link to a pre-loaded cart on Elderbrain.com, where you can confirm your rewards and provide your most up-to-date shipping address. 

Shipping and handling will be calculated at checkout based on the actual weight of your order and current carrier rates. Given the significant and unpredictable rise in international carrier, fuel, and logistics costs, we have chosen not to publish estimated shipping ranges this time. We do not add any profit to shipping charges — the amount you pay reflects the actual cost of packaging, protecting, and delivering your rewards safely.

🔥 Fueled by Passion

Elderbrain is a small team of dreamers and gamers. Descent into Madness was born from playtesting Spawns of the Mindrender, where we realized 5E needed a grittier, more psychological edge. Your support allows us to pay our artists, writers, and editors fair wages so we may bring this nightmare to life.

Our adventures throughout the years are many: Crown of the Oathbreaker, Torrents of the Spellhoarder, Scepter of the Lightbringer, and Spawns of the Mindrender are long-form adventures set in the world of Eldain, all based on community votes about the themes and setting. Descent into Madness continues the Elderbrain Team's commitment to crafting immersive, unforgettable adventures with our community of fans.

Discover the Mindscape One-Shots series, a new subscription series that delivers a beautifully illustrated 5e one-shot adventure to your inbox every month, supporting both the 2014 and 2024 rulesets and VTT. Available in three subscription tiers, each adventure includes detailed maps, new monsters, and fresh player options, including subclasses, magic items, feats, and spells. Subscribers can also enjoy welcome rewards, a loyalty program, NPC raffles, giveaways, and much more. Season One is already well underway, with eight adventures released in Drayl, the setting of Scepter of the Lightbringer, while the upcoming Season Two ventures into the Calhay Sea, from the world of Torrents of the Spellhoarder.

Tomi and Gabor, the minds behind Elderbrain, weave epic tales and run the company with dedication and care. Gergo, Zsolt, and David, our visionary illustrators, bring worlds to life with breathtaking artwork — crafting beautiful imagery for both our books and Magic: The Gathering. Victor is the glue that holds us together, the one who helps you all, ensures every piece falls into place, and takes delicate care of the members of the hive mind. Tyler is our keen-eyed hunter of typos and steadfast protector of stat blocks.

Our books are created without the use of AI. Every page is written by us, and every piece of artwork is illustrated by real artists. We believe in craftsmanship, originality, and the human touch behind every detail.

🤝 Elderbrain Community

Don't face the darkness alone. Join over 4,300 other members in our Discord community. Chat with the creators, download fan content, share your homebrew, and find groups.

Sign up for our newsletter and receive our Welcome Package, which includes free adventures, maps, new monsters, subclasses, magic items, feats, spells, custom character sheets, and STL files. You’ll also regularly receive new free content, discounts, and updates.

❤️ Thank You for Being Part of the Hive Mind

Elderbrain is sustained by the incredible community that surrounds it. Your enthusiasm, encouragement, and support make every book we create, every world we bring to life, and every new adventure we undertake possible.

None of this would be possible without you. Whether you have followed our journey, shared our work, joined a campaign, or brought our adventures to your gaming table, you are an essential part of the Hive Mind.

From all of us at Elderbrain: thank you for believing in what we create and for making this journey possible.