Cthulu is a bloated humanoid form 100 feet high with an octopoid head and a face of tentacle-like cilia. It has scaly, rubbery skin, and prodigious hands and feet with curved talons. A pair of folded bat-like wings protrude from between it's shoulders.
"Ph'nglui mglw'nafh Cthulu R'lyeh wagh'nagl fhtagn" - "In his house in R'lyeh dead Cthulu waits dreaming." R'lyeh is a great sunken city of non-Euclidean geometry hidden somewhere beneath the ocean. So bizarre is its construction that anyone entering the city (which occassionally rises above the waves) must make saving throws at +4 against fear and insanity. Cthulu lies in a huge stone structure sealed with the Elder Sign (q.v.). If the seal is broken and the god released, everyone (and/or everything) in a 100 mile radius must make a saving throw against death or go insane. This insanity lasts for a number of months equal to the creatures intelligence.
Cthulu usually attacks both physically and psionically. He can regenerate 10 hit points per melee round. He teleports up to one-half mile at will and it totally immune to the effects of water, cold, and vacuum. He can call up from the sea 10-100 Deep Ones. He will retreat into his lair if confronted with an intact Elder Sign, another of the Old Ones (such as Hastur), or some natural catastrophe, such as the re-sinking of the city of R'lyeh into the sea.
Cthulu is served by the Deep Ones as well as his human worshippers, who often interbreed with the fish men. Cthulu's cult is usually hidden and secret, and is dedicated to bringing about Cthulu's return and conquest of the world.
