1) Egyptian god 2) Egyptian legendary creature 3) Egyptian mythology 
Apep (p or p) or Apophis (s; Ἄποφις; also spelled Apepi or Aapep) was an evil god in ancient Egyptian religion depicted as a snake/serpent and a dragon, the deification of darkness and chaos (ı͗zft in Egyptian), and thus opponent of light and Ma`at (order/truth), whose existence was believed from the 8th Dynasty (mentioned at Moalla) onw....
Apep (Aapep) is an evil serpent in ancient Egyptian mythology. He is the eternal enemy of Ra. He swallows light, chasing Ra across the sky, but his main task was to snatch the souls of the dead as they passed between one life and the next.
Armour-Piercing Enhancement Programme
see Apopis