From publisher blurb:
CTHULHU HAS RISEN & TERRIFYING SECRETS SHALL BE REVEALED!
Are you ready to step beyond reality and explore the profane lore eldritch Great Old Ones and the wonders of the Dreamlands?
The Cthulhu Codicil adds a wealth of new material to Leagus of Cthulhu, the award-winning game of the Lovecraft Mythos set in the late Victorian Age.
But be warned, for once seen, the elder lore inside this book can never be unlearned.
Step across the tenuous border of reality and inside you’ll find:
New bloodline Talents and a trio of Leagues
A plethora of rituals, tomes, locations, and dread horrors
Expanded advice for playing in the Lovecraft Mythos.
A detailed exploration of the mystical Dreamlands, including rules for dreamers and altering the landscape of the Dreamlands, rituals and tomes unique to that fabled land, a complete gazetteer, and a bestiary of its notable human and inhuman denizens.