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Fantastic Adventures: Ruins of the Grendleroot for 5e
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Fantastic Adventures: Ruins of the Grendleroot for 5e

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From the author of the adamantine-best-selling book Return of the Lazy Dungeon Master...

Ten underground adventures for the fifth edition of the world's most popular fantasy roleplaying game, set within a ruin-filled mountain torn apart by the mysterious Grendleroot.

For a thousand thousand years, an ancient entity has been trapped in the heart of a mountain formed from rock not of this world. Over eons, creatures both monstrous and intelligent have explored the endless tunnels, caverns, and chambers of Blackclaw, answering the call of the mysterious entity buried within it. Over long centuries, hundreds of lairs, cities, keeps, prisons, and tombs were established within the mountain, but even those centuries of exploration did not uncover all its secrets.

Then, two centuries ago, the entity now known as the Grendleroot awoke.

Indestructible black spires shot through the rock of the mountain like the roots of a deadly weed, shattering civilizations, burying cities, and exposing caverns long lost. Today, adventurers residing in Deepdelver's Enclave explore these lost ruins once again. They seek fellow adventurers brave enough to answer the call of Blackclaw, and to seek the mysteries of the Grendleroot.

Ruins of the Grendleroot is a book of ten short easy-to-run adventures for the fifth edition of the world's most popular fantasy roleplaying game. Designed for characters of 1st to 5th level, these adventures take place in the caverns, chambers, tunnels, and ruins of the mountain known as Blackclaw, within which lurks the Grendleroot—a strange and otherworldly sentience.

Across these ten adventures, your characters will

  • cure the corruption of an old tower destined to bring daylight to the cavern of Shadowreach;
  • rescue a lost child who answers the call of a dying god;
  • seek out the source of a plague of gnome zombies;
  • travel to the Forest of Iron to stop the priest who would destroy the Grendleroot–and the entire mountain surrounding it;
  • protect Deepdelver's Enclave from marauding warbands of orcs and hobgoblins;
  • find the beast lurking in abolethic ruins that promises salvation in return for fresh meat;
  • seal up a damaged cell in a forgotten monastery, which contains a being so dangerous that even its thoughts can kill;
  • save a war hero from the elven assassins who hunt her down;
  • discover the secret to quieting the restless Grendleroot from a slumbering vampire archmage; and
  • travel to the Black Cathedral, discover the origin of the mysterious Caretakers, and stop a mage attempting to capture the power of the Grendleroot for herself.

Ruins of the Grendleroot focuses on the sense of mystery and wonder that comes from exploring ancient ruins. The central hub of these adventures, Deepdelver's Enclave, is a frontier outpost overlooking the ruined city of Shadowreach, set deep within the mountain. In Deepdelver's Enclave, adventurers and explorers recount tales of their explorations, trade treasure and artifacts, and enjoy their shared love of uncovering the mysteries of the mountain.

These ten adventures can be run independently as single-session games of roughly two to four hours each, or they can be tied together as part of a larger campaign. Five of the adventures can be combined together into a five-session mini campaign that focuses on the strange consciousness lying at the center of the mysterious mountain.

Each of these ten adventures is designed to get you up and running quickly and to help you integrate them into your own campaign. If you're familiar with the format of the book Sly Flourish's Fantastic Adventures and the concepts in the book Return of the Lazy Dungeon Master, the setup of these adventures will be familiar to you. Even if you aren't, you'll find the design of these adventures intuitive and straightforward. In this book, you'll find inspirational artwork, beautiful maps, fantastic locations, short readable summaries of places and events, evocative keywords to spark your own imagination, flexible read-aloud text, and piles of ideas to fuel your own stories.

Note, this purchase includes both PDF and ePub versions of the book.






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Reviews (9)
Discussions (8)
Customer avatar
Philipp K February 23, 2021 9:33 am UTC
Question: Is it correct that the adventurer's levels are tailored to a 4 player group, e.g. if it says level 1 chars, this means 4 level 1 chars?
Customer avatar
Joshua E November 08, 2020 8:58 am UTC
This is a great book! I am using a couple of the adventures as drop-in's in my current campaign. I do have a question though. I purchased the book on Amazon (I assume you still get your cut), is there any way to get access to the digital maps for use in Roll 20? With all of our games going online now, I'd love to have them available to my players. I can provide proof of purchase if needed. Thanks!
Customer avatar
Jesper C April 10, 2020 8:04 am UTC
I got an email about an update but nothing about what changed. I'm wondering because I have the print version.
Customer avatar
Mark Z April 20, 2020 6:46 pm UTC
Same here.
Customer avatar
Mike S May 01, 2020 4:14 pm UTC
The PDF version now includes VTT maps for free. These used to be in the art book (and still are) but since many people (most?) are now playing online, I wanted to make sure they had what they needed to do so. Thanks!
Customer avatar
Simon G March 20, 2020 2:50 pm UTC

Love the book! I was wondering if there is any chance of this coming to Fantasy Grounds?


Customer avatar
Mike S March 24, 2020 1:05 am UTC
I'm afraid I don't have any plans to build VTT specific versions but the maps in the map pack should be compatible with any VTT. Thank you!
Customer avatar
Mark Z April 20, 2020 6:47 pm UTC
The included maps work great in VTT's. I have used Roll20 and and both accepted the formats with little effort to grid.
Customer avatar
Jeremy W February 04, 2020 4:46 am UTC
Jumped on this Kickstarter as soon as I could. Got to playtest this set of adventures at a sleepaway camp I run last summer and I have pulled elements from it into another campaign I'm currently running. Mike's work is stellar, and this set of adventures -- and the story behind them -- really hit it out of the park.

I also have found his pre-generated characters to be fantastic; they're all set up to level from 1 to 5, with ASIs, proficiencies, spells, HP, and everything else you might want.
Customer avatar
Mike S March 03, 2020 1:30 am UTC
Thank you!
Customer avatar
Phil W January 21, 2020 10:54 pm UTC
How many maps? Are there both player and GM versions of them?
Customer avatar
Jeremy R January 21, 2020 11:32 pm UTC
There is one color map for each adventure, only a single numbered version of each.
Customer avatar
Mike S January 22, 2020 11:35 am UTC
The art book and map pack product includes both player and DM maps formatted for VTT play.
Customer avatar
Phil W January 22, 2020 4:32 pm UTC
That's what I needed to know. Thanks.
Customer avatar
Jeremy R January 08, 2020 4:03 pm UTC
Really like those pre-generated character sheets! Is there a blank version available that could be used to customize these?
Customer avatar
Sean N December 15, 2019 8:18 pm UTC
Hey, are there plans for a POD soon? Not sure if I should buy now or wait.
Customer avatar
Charles S December 16, 2019 8:05 pm UTC
Mike has said that the PoD will be coming soon, he's just letting the PDF/eBook version have a bit of a headstart to help find any typos or other things that want to get fixed prior to the print versions rolls out in the next few weeks. Seeing as he's already made two updates to the PDF, that's probably a good thing.
Customer avatar
Paul H December 30, 2019 10:20 pm UTC
PoD is now available...
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File Last Updated:
April 09, 2020
This title was added to our catalog on December 05, 2019.