Off topic, but it bugs the hell out of me when I see people conflate Horrors and Cthulu. Cthulu drives you mad because you can't process what you're seeing, like trying to draw non-Euclidean geometry in two dimensions. Yes, you look too long and you go mad, but the creatures of the Cthulu mythos are generally apathetic towards mortals, with rare exceptions, taking as much notice of them as you would ants. (Usually don't see them, but when they start crawling all over you then you notice them and usually start stomping them.)
Horrors, on the other hand, drive you mad because they are actively malicious and feed off your pain and suffering as they drive you insane. Your suffering is like a fine wine to them. They make the guys from Hellraiser look merciful in comparison