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That is not dead which can eternal lie,

And with strange aeons even death may die…

Here, shall you know the terrors of the void, the nightmare bringers, and the unspeakable lurkers.

Ancient secrets, whispered lore, and collected facts concerning the alien and otherworldly horrors of the Cthulhu Mythos. A cavalcade of monsters and god-like alien intelligences beyond human understanding, all vividly detailed and portrayed. With over 250 entries to inspire countless adventures.

What's Inside?

The information within is designed to bring the creatures and bizarre races of the Cthulhu Mythos to life at the gaming table, as well as all manner of great old ones, outer gods, elder gods, avatars, and unique beings. Their lore and statistics updated and revised for the Call of Cthulhu 7th edition game (and Pulp Cthulhu). All brought to startling life by the illustrations of expert artist Loïc Muzy.

Volume 1: Monsters of the Mythos

From the spawn of Abhoth to yuggs, the monsters of the Mythos are herein described, their lore and statistics updated and revised for the Call of Cthulhu 7th edition game.

With over 150 entries concerning Cthulhu Mythos monsters and alien species, as well as creatures from folklore and animal beasts, this tome supplies a wealth of ideas to bring your campaigns and scenarios life with untold horrors.

Volume 2: Deities of the Mythos

Fundamental truths of the cosmos herein lie, to be used to support and inspire countless adventures by bringing Cthulhu, Hastur, Azathoth, and many others to your games. With over 110 entries concerning great old ones, outer gods, elder gods, avatars, and unique beings, this tome supplies a plethora of ideas to immerse your campaigns and scenarios deep in the heart of Cthulhu Mythos lore.

While humanity may crave both comfort and truth, only one or the other is possible.

Play With Less Prep

The Call of Cthulhu Malleus Monstrorum on Roll20 includes:

• A combined Compendium with all book assets, including rules pages for presenting the mythos and monsters from both volumes.

• Over 300 NPCs and monster variants fully integrated with the Call of Cthulhu 7th Edition by Roll20 character sheet for easy access to drag-and-drop monsters!

• The first compendium expansion to utilize the Call of Cthulhu 7th Edition by Roll20 character sheet's NPC Stat Randomizer, allowing Keepers quick and easy tools to randomize stats for creatures of the mythos!

Accessing Your Content

Compendium
You can access all of the rules, items, and creatures from Malleus Monstrorum in the in-app compendium, as well as on the Roll20 web compendium.

Which Character Sheet should I use?
All Call of Cthulhu 7th Edition licensed content on Roll20 uses the Call of Cthulhu 7th Edition by Roll20 sheet.

Bug Reports
If you are experiencing any other issues, please let us know on the Help Center.

Call of Cthulhu (7th Edition) © copyright 1981, 1983, 1992, 1993, 1995, 1998, 1999, 2001, 2004, 2005, 2015, 2019, 2021 Chaosium Inc. All rights reserved.
Call of Cthulhu, Chaosium Inc., and the Chaosium dragon are registered trademarks of Chaosium Inc.

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