A visual of the artistic form change of "Set", the Egyptian god of evil (1700BC), a red-skin colored fallen god, who does battle each night with the sun god Ra, in the form of a serpent, to the "Devil", the Christian angel of evil, a red-skin colored fallen angel, who also appears in the form of a serpent, who does battle with the forces of good, in modern terms.

“Set, though the antagonist of light in the myths of Ra, Osiris and Horus, is not a god of evil. He represents a physical reality, a constant and everlasting law of nature, and is as true a god as his opponents. His worship is as ancient as any. The kings of Egypt were as devoted to Set as to Horus, and derived from them the sovereignty over north and south. On some monuments one god is represented with two heads, one being that of Horus, the other that of Set.”

“The name of the great conqueror, 'Seti' [1290BC] signifies 'he that is devoted to Set.' It was not till the decline of the Empire that this deity came to be regarded as an evil demon, that his name was effaced from monuments, and other names substituted for his in the ritual.”

“Set was the devil of the later Egyptian mythology.”

“In the early dynastic times, it is tolerably certain that the worship of Set was widespread, and his cult seems to have flourished until the period which lies between the XII and the XVIIIth Dynasties; but about BC 1700 a change came over his fortunes, and the Egyptians began to show the greatest detestation for him. He had, of course, always been connected with evil, but it appears that the popularity of his cult suffered greatly at this period because he was associated with the occupation of Northern Egypt by the Hyksos, who identified him with certain Semitic, Syrian gods.”

“No deity ever becomes the principle of evil, but in one god, Seth [Set], the destructive and unharmonious element is more evident than in others. The myth of Seth as the antagonist of the sky god Hor or Horus (hor = ‘face’ or ‘sky’) is as ancient as the Pyramid Texts; the hostility between the two grows in time, and finally in the Hellenistic period [323BC-30BC], Seth has become almost entirely evil. Some scholars interpret the origin of the myth as political: Horus is a god of lower Egypt, the north, and Seth is a god of upper Egypt, the south. Others insist that Seth and Horus (or Osiris in the myths) are deities of opposite ecologies, Seth representing the dry desert and Horus or Osiris the black earth [keme] or the fertilizing Nile. Egypt is one of the few cultures in which black is not the color of evil, but the color of the fertile, life-giving alluvial plains of the delta. Red was the evil color, the hostile hue of the scorching sands. Because of Seth's association with the desert, his color most commonly is red, and red-haired or ruddy people were considered in some special way his own.”

“Set is sometimes portrayed with horns, which made him the ideal image for the devil in Egyptian Christianity.”

“In the North and South of Egypt, Set was called both Nubti and Sutekh, , and there is no doubt whatsoever that he was endowed by the peoples in the Delta with all the attributes of the Semitic god Baal, בעל, whose name appears in Egyptian under the form Bar, or Balu .”

“Satan's ancestry is the result of an elaborate cross-breeding of traditions that has spanned millennia. Numerous faiths and folklores have contributed to his bloodline as it has passed through history, creating a figure rich in resonance and lore. Though widely regarded in the present day as a single supernatural entity, the preeminent embodiment of evil, Satan is actually a reduction or hybridization of a number of individual demons and mythical beings. The list of his progenitors, kinsmen and co-conspirators includes Lucifer, Mephistopheles, Beelzebub, Belial, Azazel, the Devil, various lesser devils, Ahriman, and even the Egyptian deity Set (Seth). This impressive gallery of seducers, liars, and destroyers gradually coalesced into the grand figure of the archfiend as he is now known, the great adversity of god and humanity.”

“I do not intend to do here what other scholars already have done well. Jeffrey Russell [1970] and others, e.g., have attempted to investigate cross-cultural parallels between the figure of Satan [Devil] and such figures as the Egyptian god Set or the Zoroastrian evil power Ahriman. What interest me are the specific social implications of the figure of Satan.”

— Elaine Pagels (1995), The Origin of Satin [3]