Eye of Madness
Realms of Cthulhu
RoC campaign setting for reference:
Note: The Cthulhu Mythos is the work of many different writers, and this is reflected in the many entities, names, items, and concepts which exceed and expand upon Lovecraft’s original works. Unfortunately, not all Mythos tales are created equal, and the right to make alterations, additions, or deletions to or from this story setting is reserved by the Keeper (GM).