- The Grand Grimoire of Cthulhu Mythos is an essential supplement for the Call of Cthulhu role-playing game - Contains a wide selection of spells compiled from supplements, scenarios, and campaigns published over the last thirty years - All contents have been reviewed and updated for use with the Keeper's Rulebook - Includes optional intensified magic rules, designed for powerful monsters and sorcerers - Allows you to expand and enrich your games, providing new options and challenges for players - It is the perfect resource for Keepers looking to surprise and captivate investigators - Product in Spanish, physical format, medium size - Not suitable for children under 3 years old