Here are gathered spells drawn from over thirty years of Call of Cthulhu supplements and scenarios - that`s over 550 spells of dire consequences, secrets, and unfathomable power! Each spell has been revised for Call of Cthulhu 7th Edition, including optional Deeper Magic for the most powerful of Mythos sorcerers and monsters, with which to beguile and confound investigators. Jam-packed with advice and guidance on diverse matters including spell names, elements of spell casting, magical components, and astronomical considerations, The Grand Grimoire of Cthulhu Mythos Magic also covers flawed spells, ley lines, folk magic, and the magic of the Dreamlands.