In some Marvel Comics publications, a "Lucifer" has been mentioned as being a Hell-lord with the same "fallen from Heaven" backstory. In the "Ghost Rider" series, Johnny Blaze faces a demon who claims to be Lucifer. In other Marvel plotlines, several high-level demons, such as Mephisto, Azazel, Marduk Kurios, and Satannish, have claimed to be the biblical Satan. In Marvel Comics, the Norse trickster-god Loki is shown as the main adversary of his adopted brother Thor and a common enemy of both Earth and Asgard. Although Loki has conjured up somewhat demonic magic, he is not a demon, but a misshapen frost giant. Among the characters related to Norse mythology, the fire giant Surtur is more reminiscent of a demon. The Egyptian demon-god Seth and the Japanese demon-god Amatsu-Mikaboshi have Satan-like roles in Marvel Comics.