Four-fold Reference the the (s)erpent:

1. … “And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out unto the earth, and his angels were cast out with him.” (Rev. 12:9). (Emphasis added).
2. … “And to the woman were given two wings of a great eagle, that she might fly into the wilderness, into her place, where she is nourished for a time, and times, and half a time, from the face of the serpent.” (Rev. 12:14). (Emphasis added).
3. … “And the serpent cast out of his mouth water as a flood after the woman, that he might cause her to be carried away of the flood.” (Rev. 12:15). (Emphasis added).
4. … “And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years.” (Rev. 20:2). (Emphasis added).

Commentary: Notice that (s)erpent in not capitalized, serpent is used as a descriptive element. It is intended to describe Satan/Devil as a serpent. In the garden of Eden, a serpent deceived and lied to Eve. (s)erpent is thus a reference to describe Satan/Devil as a liar and deceiver. Using the meaning of universalness and foursquareness, Satan/Devil is universally and completely a liar and deceiver, no matter from which angle you view him. Lying and deception envelope him on all sides of his being.