Cthulhu in Lorrimor’s Legacy | World Anvil

Cthulhu (kuh-THOOL-hu)

"They were not composed altogether of flesh and blood. They had shape... but that shape was not made of matter. When the stars were right, They could plunge from world to world through the sky; but when the stars were wrong, They could not live. But although They no longer lived, They would never really die. They all lay in stone houses in Their great city of R'lyeh, preserved by the spells of mighty Cthulhu for a glorious resurrection when the stars and the earth might once more be ready for Them."
  Ancient Cthulhu is thought to be the most powerful of a group of demigods known as the Great Old Ones, and is regarded as the herald of the Outer Gods.  

Description

The most detailed descriptions of Cthulhu are based on statues of the creature and appears to be the subject of the Sea-Sage Effigy It is represented as a monster of vaguely anthropoid outline, but with an octopus-like head whose face was a mass of feelers, a scaly, rubbery-looking body, prodigious claws on hind and fore feet, and long, narrow wings behind.  

Worshippers

Cthulhu is worshipped by various aquatic races (mostly notably the Skum), those dwelling near coasts, and those driven to madness by haunted dreams. They are careful to hide their faith and only meet in barely trodden places, infecting others with terrible visions of their master rising from his sunken city. They know that when the stars are right, R'lyeh will rise again, and it will be only a matter of time before their master arrives on Golarion and wipes it clean to prepare for the Outer Gods' return. They believe that their obeisance will cause Cthulhu to reward then, but in truth Cthulhu is unlikely to notice them at all. Cthulhu's temples are stark, cyclopean, monolithic buildings, but since most of his worshippers lack the resources to build them, they usually make do with simple hidden shrines.  

Related or Referenced