Thank you for noticing the similarity, Nicola!
THE CTHULHU MYTHOS (WIKI)
The Cthulhu Mythos is a shared fictional universe, based on the work of American horror writer H. P. Lovecraft.
The term was first coined by August Derleth, a contemporary correspondent of Lovecraft, who used the name of the creatureCthulhu—a central figure in Lovecraft literature and the focus of Lovecraft's short story "The Call of Cthulhu" (first published inpulp magazine Weird Tales in 1928)—to identify the system of lore employed by Lovecraft and his literary successors. The writer Richard L. Tierney later applied the term "Derleth Mythos" to distinguish between Lovecraft's works and Derleth's later stories.
Authors of Lovecraftian horror use elements of the Mythos in an ongoing expansion of the fictional universe.
THE CTHULHU MYTHOS EXPLAINED (Youtube Video)
COMPLETE MYTHOS TALES
10 SCARIEST MONSTERS