Cthulhu

Cthulhu, the Old God, the Sleeper in R'lyeh. This ancient being of immense power has been hailed as a deity by many groups of people throughout history, his follower often acting in small, hidden and concealed groups, communities and cults.

Although never depicted in any known records, there are surprisingly frequent hints towards the influence of Cthulhu in ancient carvings and mosaics. His influence is often marked with the presence of unnatural tentacles either coming out of creatures or entangling them, depending on the myth being presented.

The Old God is often considered as a side-effect of hysterical insanity and in any respectable literature the deity is considered a boogeyman and nothing more.