TABLE OF CONTENTS INTRODUCTION . 5 G � � � � � � � � � � � � � � � � � � � � � � �120 H � � � � � � � � � � � � � � � � � � � � � � �127 CONCERNING MAGIC . 7 I � � � � � � � � � � � � � � � � � � � � � � �128 State of Mind � � � � � � � � � � � � � � � � � 7 The Nature of Sacrifice� � � � � � � � � � � � � 7 J � � � � � � � � � � � � � � � � � � � � � � �131 Are the Stars Right? �� � � � � � � � � � � � � � 8 K �� � � � � � � � � � � � � � � � � � � � � � �131 Wheel of the Year � � � � � � � � � � � � � � 10 NPC: Thomas Davenport � � � � � � � � � �133 CONCERNING SPELLS . 11 L �� � � � � � � � � � � � � � � � � � � � � � �134 Spell Names � � � � � � � � � � � � � � � � � 11 M� � � � � � � � � � � � � � � � � � � � � � �138 Deeper Magic � � � � � � � � � � � � � � � � 11 N � � � � � � � � � � � � � � � � � � � � � � �144 Adjusting Spells � � � � � � � � � � � � � � � 12 Difficulties in Spellcasting �� � � � � � � � � � 12 O � � � � � � � � � � � � � � � � � � � � � � �146 Folk Magic � � � � � � � � � � � � � � � � � � 13 P �� � � � � � � � � � � � � � � � � � � � � � �147 Flawed Spells� � � � � � � � � � � � � � � � � 13 Q � � � � � � � � � � � � � � � � � � � � � � �154 Dreamlands Magic � � � � � � � � � � � � � � 14 Spirit Attacks and Possession � � � � � � � � 14 R �� � � � � � � � � � � � � � � � � � � � � � �156 Spell Components �� � � � � � � � � � � � � � 15 S �� � � � � � � � � � � � � � � � � � � � � � �162 Table 1: Spell Components � � � � � � � � � 16 T �� � � � � � � � � � � � � � � � � � � � � � �178 Magical Residue �� � � � � � � � � � � � � � � 18 Ley Lines� � � � � � � � � � � � � � � � � � � 19 U �� � � � � � � � � � � � � � � � � � � � � � �182 V �� � � � � � � � � � � � � � � � � � � � � � �183 SPELL CATEGORIES . 22 NPC: Niels-Viggo Schou � � � � � � � � � �185 THE GRAND GRIMOIRE . 26 W � � � � � � � � � � � � � � � � � � � � � �186 A �� � � � � � � � � � � � � � � � � � � � � � � 26 Y �� � � � � � � � � � � � � � � � � � � � � � �192 B �� � � � � � � � � � � � � � � � � � � � � � � 34 C �� � � � � � � � � � � � � � � � � � � � � � � 53 Z �� � � � � � � � � � � � � � � � � � � � � � �192 NPC: Hestia Locksby �� � � � � � � � � � � � 85 D � � � � � � � � � � � � � � � � � � � � � � � 93 INDEX . 194 E �� � � � � � � � � � � � � � � � � � � � � � �102 F �� � � � � � � � � � � � � � � � � � � � � � �116 AUTHOR BIOGRAPHIES . 200 Cyaegha © copyright 2020 the Estate of Eddy C Bertin� Used with Gol-goroth and Koth © copyright 2020 Cabinet Licensing LLC� permission� ROBERT E� HOWARD is a trademark or registered trademark of Robert E� Howard Properties LLC� Used with permission� Some Byatis, Daoloth, Eihort, Gla’aki, Ghroth, Green Decay, Keeper of the Robert E� Howard elements may be in the public domain� Moon-Lens, Shaggai, Shan, Tomb-Herd, and Y’golonac © copyright 2020 Ramsey Campbell� Used with permission� Nyogtha and Zu-Che-Quon © copyright 2021 Carole Ann Rodriguez� Used with permission� Some Henry Kuttner elements may Ossadagowah and Zoth-Ommog © copyright 2020 the Estate of Lin be in the public domain� Carter� Used with permission� Bugg-Shash, Call the Black, Chthonian, Shudde M’ell, and Yibb-Tstll Cthugha, Ithaqua, and Zhar and Lloigor © copyright 2020 the Estate © copyright 2020 Brian Lumley� Used with permission� of August Derleth� Used with permission� SampleAbhoth, Quachil Uttaus, Rlim Shaikorth, file and Tsathoggua © copyright Ahtu © copyright 2020 David Drake� Used with permission 2020 the Estate of Clark Ashton Smith� Used with permission� Chaosium recognizes that credits and copyrights for the Cthulhu Mythos can be difficult to identify, and that some elements of the Mythos may be in the public domain� If you have corrections or additions to any credits given here, please contact us at mythos@chaosium�com� s h o o t i n g d e e p o n e s Sample file 4 INTRODUCTION Ygnaiih… ygnaiih… thflthkh’ngha… Yog-Sothoth… Come! all ye, and learn the secret that hath not yet been revealed. —H. P. Lovecraft, The Dunwich Horror —Aleister Crowley, Liber AL vel Legis (The Book of the Law) For the first time, the Grand Grimoire of Cthulhu Mythos Magic gathers together some 550+ Call of Cthulhu spells from across The Oxford English Dictionary describes magic as “the thirty years’ worth of supplements, scenarios, and campaigns. A power of apparently influencing events by using mysterious useful tool for Keepers, this tome is a resource to both inform or supernatural forces.” This definition works just fine and inspire. All of the spells have been revised and updated for but misses one important aspect when we consider the Call of Cthulhu 7th Edition. Some spells have been changed magic of the Cthulhu Mythos—namely, corruption. In to be more generally useful and less specifically tailored to a many traditional fantasy games and fiction, magic is often particular scenario; in other cases, where multiple spells were a source of wonder, possibility, and utility, a tool used to virtual duplicates, they have been amalgamated into a single entry. achieve a result for little or no cost. Very much a tool used A small number of spells (usually found in campaigns or older to achieve a result for little or no cost. However, the magic scenarios) were found to be overly specific to their original plot of the Cthulhu Mythos, while seemingly offering tangible and, having little particular use outside of that plot, have not been benefits, is hostile. It gives with one hand and takes away included. Nearly all spells have been given a number of alternative with another. Mythos magic corrupts; it breaks down moral names, where appropriate, allowing Keepers to keep their players fiber and sinks its teeth into the mind, shredding both on their toes and ensure no spell becomes commonplace. sanity and humanity. The opening chapters take a brief look at magic Wielding otherworldly energies damns the wielder: the and spells in general and provide additional resources more one drinks of the unnatural power, the greater the concerning astronomical considerations, spellcasting, and infection becomes. If reading a tome can be likened to other relevant information for Keepers to use as they will. playing with fire, casting a spell is like pouring gasoline Flawed spells, deeper magic, folk magic, and Dreamlands over your head and striking a match. The erosion of Sanity magic are all discussed and advice and guidance is provided points combined with a thirst for magical knowledge drives for developing such magical tangents in your games. Three people insane, destroys morality, and leaves only the insane magical non-player characters are detailed, each able to be will of the sorcerer to lust after even greater power and to dropped into games to help or hinder investigators. plumb greater depths of horror. Hopefully, the Grand Grimoire of Cthulhu Mythos Magic will The magic of the Cthulhu Mythos defines the cosmos provide you with not only a handy resource in the middle of a and it is the awful truth that lurks beyond humanity’s game, but also a deep well of inspiration to draw upon when perception of reality. Those who touch its flame are forever creating your own scenarios, plots, and encounters. changed. SampleIn lucem, ita inspiratio. In tenebris secreta sapientiae. file Mike Mason, 2016 5 s h o o t i n g d e e p o n e s Sample file 6 CHAPTER 1 CONCERNING MAGIC There is great danger in me; for who doth not understand these runes shall make a great miss. He shall fall down into the pit called Because, and there he shall perish with the dogs of Reason. —Aleister Crowley, Liber AL vel Legis (The Book of the Law) any diverse matters should be taken into is always prudent to ensure that such entities are “made to consideration when attempting to bend the feel at home” lest they feel snubbed or slighted. cosmic forces of the universe to one’s own will. MSome guidance and ideas follow for Keepers wishing to Watch the Heavens add layers of verisimilitude to the magic in their games. Astronomical configurations are often of great significance in the effectiveness of certain spells (particularly when invoking or petitioning a Mythos entity). Wizards who STATE OF MIND neglect research and who pay no heed to the turning of Having the correct frame of mind when spellcasting can be the Wheel of the Year will find themselves undone—their vital to success. Distracted sorcerers risk spells performing spells may fizzle or unexpected outcomes may arise. Great poorly, not at all, or worse transforming into something sorcerers plan years in advance to ensure they are in step undesirable. Ritualistic purification of mind and body are for the perfect moment of astral alignment—this is why often requirements of more involved spells. Often all that wizards will seek far-reaching revenge on those who is required is a clear and focused mind—hence, the reason vandalize such feats of planning (cue the investigators). why a number of spells call for periods of meditation. For more on astronomical considerations see Are the Some wizards will ritually bathe; others may use foul- or Stars Right? (see page 8). sweet-smelling oils to purify their flesh. Outside concerns, such as dire conditions and combat, THE NATURE OF SACRIFICE act to distract the spellcaster. When such matters might Oh, there are little rhymes a mage might use to remember the prevent the caster from clear thought, call for an INT roll sequence of what must be done, but the words themselves don’t Sigil of the Great Old Ones by Goomi Opposite: to ensure clarity of mind and purpose. do a thing. You could write every