Cthulhu, the terrifying Primordial created by horror writer H.P. Lovecraft, is a cosmic entity first represented in the short story "The Call of Cthulhu". To describe Cthulhu is to delve into the convergence between an octopus, a dragon, and a humanoid-shaped creature. This powerful being is one of the most popular within the Cthulhu Mythos, a literary universe of cosmic horror.

In Lovecraft's stories, Cthulhu is portrayed as an extraterrestrial creature with the ability of communicate in dreams. Its scaly and indestructible body made of an unknown substance makes it practically invincible. Dormant under a seal in the underwater city of R'lyeh, Cthulhu waits to awaken one day and reclaim its power over Earth, dictating destruction and chaos. The followers of this dark being recite ancient words in its honor, awaiting its glorious resurrection from the depths of the ocean. The influence of Cthulhu in popular culture is undeniable, making it an icon of cosmic horror and literary mythology.