I'll admit it. I have a bit of a dice fetish. There's just something magical about polyhedral dice, even if they never get used by me these days (except for cons, I game exclusively via Roll20).
Cthulhu Insanity Dice are just what my dice collections needs. Not that I need them, but the collection is whispering...
The first die has ten different Insanity results. You never know what your character is going to do that moment they come face to face with the unspeakable horror and your character's mind snaps.
The second die has ten different phobia's your character can pick up later, which often gets forgotten and never added to the character.I wonder if that whispering is linked to an insanity. 1 in 10 chance ;)