The monsters of the Cthulhu Mythos at your fingertips! Call of Cthulhu Keeper Decks are designed to provide in-game resources, handy reference, and information. Use the Malleus Monstrorum Deck when you need to reference a monster profile and when designing scenarios and encounters. Like the other Call of Cthulhu Keeper Decks, this deck provides new layers to plots, enhance the story, and provide quick access to an array of fiendish foes.

• A plethora of Mythos fiends. Over 60 monsters detailed in the Malleus Monstrorum are presented here on their own individual cards, with all relevant game information on one side, and evocative artwork on the other. Use the cards for quick-reference during your games, and as a handy image to show your players exactly what their investigators are facing!
• A pile of scenario seeds. Use the deck to inspire your own tales of Call of Cthulhu! Shuffle up and draw a card-then work that monster into your next story! Alternatively, you could introduce a mysterious portal, tome, or enemy, where the monster produced is completely random! Additionally, this deck includes several blank cards for you to fill with forbidden monsters of your own creation.
• A Malleus Monstrorum companion. Combine these cards with the epic 2-volume tome Malleus Monstrorum! The immense Cthulhu Mythos bestiary includes detailed story information and scenario seeds for all the monsters in the Keeper