The Creeping Chaos was a powerful creature that originated from another dimension. It is said that the powerful artefact known as the Crown of Genghis was capable of summoning this creature. A demon possessed Frank Stone who accompanied Aline Cedrac to the mythical land of Aggartha in order to find and use the powerful Crown of Ghenghis to unleash the Creeping Chaos into the world.
The appearance of the Creeping Chaos is based off one of the H.P. Lovecroft's Old Gods, Shub-Niggurath.