Sample file We would like to dedicate this tome to our spouses and families who tirelessly supported us during its writing and development. And to he who must not be named. Sample file Credits AUTHORS AddITIONAL ART Sandy Petersen, James Jacobs, Arthur Richard Luong Petersen, Ian Starcher, David N. Ross GRAPHIC DESIGN AND LAYOUT DEVELOPMENT AND CONVERSION Tony Mastrangeli David N. Ross SALES MANAGER PROJECT DIRECTOR Christopher Helton Arthur Petersen SHIPPING BUSINESS MANAGER Christy Crace Christine Graham CUSTOMER SUPPORT EDITING AND PROOFREADING George Botelho Eytan Bernstein, Erik Scott de Bie, COMMUNITY AND VF SUPPORT Thomas Weber Pierre “Pit” Lanrezac COVER AND INTERIOR ART PLAYTEST SUPPORT Kent Hamilton Lincoln Petersen, Andrew Lucio, MONSTER AND GREAT OLD ONE ART Jonathan Cohen, Ryan Brown Helge Balzer Sandy Petersen’s Cthulhu Mythos, © 2018, Petersen Games. Printed in China. ISBN-13: 978-0-9995390-4-0 Product Identity: The following items are hereby identified as Product Identity, as defined in the Open Game License version 1.0a, Section 1(e), and are not Open Content: All trademarks, registered trademarks, dialogue, plots, storylines, locations, characters, artwork, and trade dress. (Elements that have previously been designated as Open Game Content or are in the public domain are not included in this declaration.) Open Content: Except for material designated as Product Identity (see above), the game mechanics of this Petersen Games game product are Open Game Content, as defined in the Open Gaming License version 1.0a Section 1(d). No portion of this work other than the material designated as Open SampleGame Content may be reproduced in any form without written permission. file No part of this book or contents were plagiarized from the Necronomicon of Abdul Alhazred, and no foul entities from the spheres beyond will be summoned during the use of this book. However, if such an untoward event were to happen upon reading the contents of this book, Petersen Games advises that the proper ritual precautions be taken, including but not limited to the inscription of an Elder Sign upon your door or gate. ii Table of Contents CHAPTER 1: USING THIS BOOK ...... 1 CHAPTER 5: SPELLCASTING IN WHAT IS THE CTHULHU MYTHOS? .......... 1 THE MYTHOS ................. .85 BRINGING HORROR TO HEROIC FANTASY ..... 2 FORMULAS ......................... 85 SPELLS ............................ 88 CHAPTER 2: MYTHOS PLAYER Spell List Not Required. .88 Class Lists ...............................89 CHARacTER RacES .............. .7 Spell Descriptions .........................92 DREAMLANDS CAT ..................... 8 GHOUL ........................... 14 CHAPTER 6: MYTHOS GNORRI ........................... 21 ITEMS AND TEXTS .............. 119 ZOOG ........................... 28 ADVENTURING GEAR ................. 119 OTHERWORLDLY HUMANS ............... 34 ALIEN TECHNOLOGY AND MAGIC ITEMS .... 122 TEXTS OF THE CTHULHU MYTHOS ........ 132 HAPTER LAYER HARacTER C 3: P C Text Descriptions .........................133 OPTIONS .................... .37 CLASS OPTIONS FOR MYTHOS RacES ....... 37 CHAPTER 7: CULTS OF Dreamlands Cat ...........................37 Ghoul ..................................39 THE MYTHOS ................ 139 Gnorri .................................41 CULT OF THE BLacK GOAT ............. 140 Zoog ...................................42 CULT OF THE CRawLING CHAOS ......... 141 OTHER CLASS OPTIONS ................ 43 Coven of the Black Man .................... 141 Barbarian Primal Path ......................43 Cult of the Haunter .......................142 Bardic College ............................44 Cult of the Howler ........................142 Cleric Divine Domains ......................45 Cult of the Shadow Pharaoh .................143 Druid Circles ............................49 Retinue of the Bloated Woman ...............143 Fighter Martial Archetype ....................51 Seekers of the Dark Demon ..................143 Paladin Oath .............................52 CULT OF GREAT CTHULHU ............. 144 Roguish Archetypes ........................53 CULTIC MADNESS OF THE NUCLEAR CHAOS . 145 Trapsetter Traps ...........................54 CULT OF THE OPENER OF THE WAY ....... 146 Sorcerous Origins .........................55 Warlock Options ..........................57 CULT OF THE SLEEPER ................ 147 Wizard Arcane Tradition .....................61 CULT OF THE WINdwaLKER ............. 149 BacKGROUNDS ...................... 62 CULT OF THE YELLOW SIGN ............ 150 Alienist .................................62 LESSER CULTS ..................... 152 Mythos Cultist ............................63 Cult of Abhoth ...........................152 Mythos Survivor ...........................64 Cult of Atlach-Nacha ......................152 Visionary ................................65 Cult of the Water Lizard ....................152 NEW FEATS ......................... 67 Cult of Byatis ............................152 Cult of Chaugnar Faugn ....................153 Cult of Cthugha ..........................153 HAPTER NSANITY C 4: I Cult of Father Dagon and Mother Hydra ........153 AND DREAD .................. .70 Cult of Ghatanothoa .......................154 DREAD AND INSANITY ................. 71 Cult of Nyogtha ..........................154 Dread ..................................72 Cult of the Green Flame ....................154 Insanity .................................74 Cult of Yig ..............................154 IA! IA! CTHULHU FHTAGN: TCHO-TCHO CULTURE ................ 155 AN AKLO PRIMER .................... 81 DEEP ONE CULTURE ................. 156 THE DREAMLANDS ................... 81 MYTHOS ENTITIES AND RELIGION ........ 157 Normal Dreaming .........................81 Deep Ones ..............................158 Dreamlands Travel .........................82 Ghouls ................................158 SampleFungi from Yuggoth ....................... file158 Elder Things and the Great Race of Yith. 158 Moon-beasts ............................158 iii Other Aliens ............................158 QUacHIL UTTAUS .................. 244 OTHER RacES AND THE MYTHOS ........ 158 RHAN-TEGOTH .................... 249 Dragonborn .............................158 Rhan-Tegoth ............................252 Dwarves ................................158 SHUB-NIGGURATH ................... 253 Elves ..................................159 SATHOGGUA ATHER OF ORMLESS PawN Gnomes. 159 T , F F S . 259 Avatar of Tsathoggua .......................261 Goblinoids .............................159 Halflings ...............................159 TULZSCHA ....................... 262 Humans ...............................159 UBBO-SATHLA, THE TOME KEEPER ...... 264 Kobolds ...............................159 YIG, FATHER OF SNAKES .............. 269 Lizardfolk ..............................159 Avatar of Yig ............................ 271 Merfolk ................................159 YOG-SOTHOTH ..................... 272 Orcs ..................................159 Tieflings ...............................159 CHAPTER 9: MYTHOS MONSTERS .. .277 ABYSSAL CUSTODIAN ................. 278 CHAPTER 8: GREAT OLD ONES, BHOLE ........................... 281 UTER ODS AND THERS O G , O ....... 161 Bhole Hatchling ..........................281 READING AN ELDER INFLUENCE Adult Bhole .............................282 STAT BLOCK ....................... 162 BRAIN CYLINDER .................. 283 ABHOTH ......................... 165 Scholar Brain Cylinder .....................284 The Filth ...............................167 Sorcerer Brain Cylinder ....................284 ATLacH-NacHA .................... 168 Control Drone ...........................286 Avatar of Atlach-Nacha .....................170 BYAKHEE ......................... 287 AZATHOTH, THE DAEMON SULTAN ........ .171 CAT, DREAMLANDS ................. 288 BOKRUG, THE WATER LIZARD ........... 174 Dreamlands Cat, Saturnian ..................288 The Ghosts of Ib .........................176 Dreamlands Cat, Uranian ...................289 Avatar of Bokrug ......................... 177 Ulthar Champion .........................290 BYATIS, THE SERPENT-BEARDED ........ 178 COLOUR OUT OF SPacE ............... 291 Avatar of Byatis ..........................180 DARK YOUNG OF SHUB-NIGGURATH ...... 293 CHAUGNAR FAUGN .................. 181 Adolescent Dark Young .....................293 Avatar of Chaugnar Faugn ...................182 Adult Dark Young .........................294 Scion of Chaugnar Faugn ...................183 Mature Dark Young .......................295 CTHUGHA ........................ 184 DEEP ONE ........................ 296 FATHER DAGON .................... 188 Deep One Bishop .........................297 Father Dagon ............................190 Deep One Hybrid Cultist ...................298 Deep One Scion Priest of Cthulhu .............299 GHATANOTHOA ..................... 191 Rootling ...............................195 DHOLE ......................... 300 Dhole Hatchling ..........................301 GHROTH, THE HARBINGER ............. 196 Dhole Adult .............................302 Worm of Ghroth .........................199 DIMENSIONAL SHAMBLER ............. 304 GOBOGEG, THE MOON LaddER. .200 ELDER THING ..................... 306 GREAT CTHULHU .................. 204 EREMITE (MYTHOS WIZARD). 309 HASTUR THE UNSPEAKABLE ........... 209 Eremite Symbiont ........................310 ITHAQUA ......................... 214 Dracoform Eremite Symbiont ................310 THE KING IN YELLOW ................ 221 Dracoform-Bound Eremite