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The Fall of Cyrog



Deep in the Underdark, an elder brain Cyrog has died and been reanimated by the Demon Prince of Undeath, Orcus. Brave adventurers will be called upon to help vanquish this evil. Should they fail, Cyrog and all of his mind flayers will be able to create an army for Orcus to unleash destruction upon the Underdark and the world.

In this supplement to Out of the Abyss, your party will explore the lair of an elder brain named Cyrog (aluded to in the official adventure, but never fleshed out). The adventure hooks are primarily linked to Out of the Abyss, but the story may be run as a standalone adventure as well. The adventure contains opportunities for roleplay, exploration, and combat.

The adventure zip file contains:

  • A 14 page PDF dungeon adventure, complete with exciting mind flayer monsters from the Monster Manual and Volo's Guide to Monsters (and possibly Orcus himself). 
  • 6 high-resolution color PNG files of the lair map as well as 1-inch grid battlemaps for 5 of the rooms, such as the Dissection Chamber and Transformation Room. 
  • A printer friendly version of the PDF with a white background. 

Expect 4 to 6 hours of gameplay for a party of 4 to 6 characters, levels 9 to 12. 

The previews below show a sample of the adventure. 

preview 1

Preview 2

NOTE: THIS IS THE PDF VERSION OF THE ADVENTURE, if you are looking for the *Fantasy Grounds* version, click the link below!


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Reviews (12)
Discussions (0)
June 16th, 2024
This worked really well as a side quest in OotA. My players enjoyed it, and the final encounter was memorable. The assets provided were good; I was able to use the maps in Foundry for easy prep. [...]
January 1st, 2024
Good dungeon crawl overall. My players enjoy combat and dungeons so I'm sure it'll be a hit. The art is nice and the story works well as a one shot or with OOTA. I plan on running this as a side quest to OOTA, (OOTA players stop reading) and [...]
August 1st, 2023
This Module was recommended to me while I was running Out of the Abyss. I'm really glad I did as the players had a lot of fun with this module and it had the most memorable place for them. They returned to this area at the end of the Campaign fo [...]
July 15th, 2023
I just DMed this adventure and my players and i had a blast! It has a great hook and is easy to run due to thoughtful inclusions such as a summary at the beginning, possible alternative plot hooks and "friendly advice" that can come from a he [...]
June 16th, 2022
I have both played in and DMed this module, each time as a one shot. I cannot recommend it highly enough. This is the kind of content that Out of the Abyss should have been full of, but was sorely lacking. This module has four very excellent thi [...]
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File Last Updated:
June 06, 2022
This title was added to our catalog on February 17, 2020.