Many persons and beings have falsely pretended to be gods or demons during history; in particular, none of the ones claiming to be major figures from Judeo-Christian beliefs have turned out to be the real article, although several angels have appeared in recent years, as well as an apparent true rebellion and expulsion of angels from a higher realm known as Paradise, proving that some form of Heaven and Hell do exist in this Universe, seemingly like those in keeping with common real-world religious belief. Similarly, demons are evil magical beings who take affairs in the matters of the universe. Some of the most powerful are Blackheart, Mephisto, Nightmare, Satannish, Thog the Nether-Spawn and Zom. There are also powerful benevolent mystical entities such as the Vishanti; or amoral and malevolent entities who are not truly demonic, such as Dormammu and the Octessence, or ones heavily drawing upon the mythologies of H. P. Lovecraft and Robert E. Howard. Some supernatural beings, entities and human characters created by Lovecraft and Howard, who were friends and influenced each other's work, have been adapted by Marvel and include Abdul Alhazred, Conan the Barbarian Nyarlathotep and Set. Some deities or demonic beings that are original characters of Marvel have been heavily influenced by these mythologies, such as Shuma-Gorath.