Cthulhu does not exist wholly in the physical world, and space and time strain against his presence. This grants Cthulhu a deflection bonus to AC and a racial bonus on Reflex saves equal to his Charisma modifier (+12). His apparent and actual position are never quite the same, granting him a 50% miss chance against all attacks. True seeing can defeat this miss chance, but any creature that looks upon Cthulhu while under the effects of true seeing must succeed at a DC 40 Will save or be afflicted by a random insanity (this is a mind-affecting effect). The save DC is Charisma-based.