Mephisto's Hell is one of many demonic realms found in the Marvel Comics universe, ruled over by the arch-demon and cosmic entity known as Mephisto - who has fashioned himself upon the mortal concept of Satan and thus fashioned his own world upon humanity's primitive concept of the netherworld, only to rivaled by another powerful demon known as Marduk Kurios, who also likes to call himself Satan and rules a personal Hell of his own.