Originally Posted by Realms of Chaos Insanity rules already exist for DnD, in Unearthed Arcana, and I think that they fit rather well to this occasion. In fact, here's a feat for Blasphemous Preachers using sanity rules: Oh . . . I'll have to give those a look.
H.P. Lovecraft the man who inspired the creation of Mind Flayers, Aberrations, the Far Realm, and so much more.