Roll20 uses cookies to improve your experience on our site. Cookies enable you to enjoy certain features, social sharing functionality, and tailor message and display ads to your interests on our site and others. They also help us understand how our site is being used. By continuing to use our site, you consent to our use of cookies. Update your cookie preferences .
Create a free account

Roll20 Marketplace Product

The Thing That Should Not Be

Author: DMDave

Addon: Content which can be added into any game - new or existing!

Price: $6.99
This Game Addon is available in the following bundles

The Thing That Should Not Be

Are you ready to face the Herald of the End Times?

The Thing That Should Not Be is a Fifth Edition horror-mystery adventure for three to five characters with an average party level (APL) of 5 or 6. Characters who successfully complete this adventure should earn enough experience to gain at least one level. The characters unravel a mystery that leads them to a strange, cold island in the Tyrant’s Riddle. There, they discover a hibernating god whose dark hunger cannot be sated. This adventure works particularly well as a follow-up to the adventure Winds of Vapul featured in the Legends of Omeria Starter Set.

Although the adventure is set in the DMDave campaign world of Omeria, it can easily be retooled to take place in any campaign setting of your choice where the Heald Mine and the horrible creatures within wouldn’t seem too terribly out of place.

Adventure Summary

  1. The Hook. A close friend of the characters asks them to investigate the disappearance of his son, who vanished over a year ago.
  2. The Investigation. The characters investigate the missing person and find clues that point towards the son traveling north for a mining job. A series of letters points to the missing person’s last known location, a small fishing town named Providence near the arctic circle.
  3. The Town. The characters arrive at Providence. The villagers tell the characters that all the miners on the job—including the missing person—left six month ago on a ship. Shortly after it left, the ship wrecked, killing everyone on board. Before the characters go to leave, an unlikely ally informs them that the villagers are lying.
  4. The Quarry. After the characters learn that the villagers lied to them, they are brought to the quarry where the missing person and the other miners worked. Cultists and monsters attack them. Inevitably, they make it inside the quarry’s mine.
  5. The Hibernating God. The characters discover that the miners uncovered a strange, monstrous statue. The statue is actually the dormant form of an alien god named Rhan-Tegoth. The mine’s owner fed most of the miners to the evil god.


As a DMDave adventure, you can expect the following features and benefits:

Quick Guide

System: D&D 5E
Starting Level: 5-6
Length: One-Shot (1-2 sessions)
Installation: Add-On
Sheet: D&D 5e by Roll20


Install this Add-On via the dropdown menu in the Game Addons section of the Game Details Page. Select The Thing That Should Not Be and click on the blue Add to Game button beside the drop-down menu.

Bug and Technical Issue Reporting

If you encounter any bugs or technical issues with this adventure or any of DMDave's adventures on Roll20, visit our Bug Report Page and let us know!

i Can only be used with Roll20; cannot be downloaded.

You might also like...

License: Roll20 End User License Agreement
(Personal Use Only, Do Not Distribute)