Y'Golonac

Y'Golonac is a Great Old One of the Cthulhu Mythos. Known as "The Defiler", he (it?) is a god of perversion and depravity, not just sexual perversion/depravity, but any perversions or deprivations that can be conceived of by sentient minds (sane or otherwise). Y'Golonac is sometimes summoned simply by reading his name (not reading out loud, merely reading).

In appearance, he is humanoid in form, but without a head or neck, and with mouth in the palm of each hand.