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The Horror Under the Mountain
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The Horror Under the Mountain


The Horror Under the Mountain.  

Volume 1 of the Great White North Trilogy.  

  On a nameless, featureless demi-plane the Tarrasque rages across an all-encompassing nothingness.  Last seen on Faerun a century ago during the cataclysm of Odobaz, the battle mage order of the Eldritch Storm sacrificed itself to banish the mighty titan to its demi-plane prison.  Now a foul power emerges in the High Ice and nightmare visions of the Tarrasque trampling cities wrack the minds of the living—can your adventurers defeat the Horror Under the Mountain?

This is a 46 page adventure for characters level 14 to 16.  You can preview the entire adventure by clicking "Full-size Preview"

Note: following the release of Volo's Guide to Monsters I have included an addendum (as a seperate file) which updates the module with the relevant information regarding Mind Flayers.

If you like this adventure check out the next one in the series, The Dead Wedding

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Reviews (4)
Discussions (5)
Customer avatar
Michael B July 21, 2017 3:41 pm UTC
Any idea when the next two installments of the trilogy will be available? My group really liked the concept of this, and I want to make sure the trilogy is still in process before we get rolling on it. Thanks!
Customer avatar
Brian M July 22, 2017 8:20 am UTC
Hi Michael,
I've actually just finished running the playtests of the second installment. I've decided to treat the three as a stand-alone series. They'll take place in the same general area, but the villains and plots will change. The third installment will, however, bring back Beotan and the High Ice. I'm in the process of formatting the new adventure, "The Dead Wedding," on the homebrewery and I hope to have it up in a couple of weeks.
p.s. if you play through Horror please leave a review (good, bad, or ugly) and I'll take on the feedback for any future revision.
Customer avatar
Brian M November 16, 2016 7:45 am UTC
November 15, 2016, added short addendum that incorporates Volo's Guides to Monsters.
Customer avatar
David E May 02, 2016 12:40 am UTC
What do the brown and gray lines represent on the Illithid city map? I'm thinking gray are cavern walls and brown are roads or paths, but there's all this wide open space. is that wide open space just filled with generic shops and dwellings, so the only path through is the road?
Customer avatar
Brian M May 02, 2016 9:58 am UTC
First, thank you for your purchase, comments, and your review!
When I play tested the adventure the gray lines were main roads and the brown lines were small paths within the city. The grey lines exit the cavern (either into the underdark [ecnouncter 8] or into the grimlock caverns [marked as 5 on the map]). The grey path on the east by the residence is elevated as building 10 sits on a natural shelf in the cavern. The two brown lines are paths that rise up to it. The white buildings are shops, temples, residences, etc. The open space was dark ground strewn with boulders and pools of water heated by thermal vents. Think mordor but underground. I'm working on an update that will add more detail to the city.
Customer avatar
David E May 07, 2016 2:18 am UTC
Cool, thanks.
Customer avatar
David E May 02, 2016 12:20 am UTC
WRU part 2 in the trilogy?
Customer avatar
Brian M May 02, 2016 9:50 am UTC
Hope to get it done this summer. Unfortunately I'm too busy with my square job at the moment to write part two.
Customer avatar
Brian M March 11, 2016 2:16 pm UTC
March 11, 2016. Version 1.1 uploaded. Substantial reformatting, minor editing and corrections, additional maps and art added.
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File Last Updated:
November 15, 2016
This title was added to our catalog on February 08, 2016.