En Sabah Nur, also known as the Apocalypse, is one of the two overarching antagonists(alongside Sebastian Shaw) of the X-Men film series, appearing as the overarching antagonist of X-Men: Days of Future Past and the titular main antagonist of X-Men: Apocalypse.
Initially the pharaoh of Ancient Egypt, he was betrayed by his followers and left to die in a pyramid. However, his Four Horsemen sacrificed themselves and protected Apocalypse with an enchantment that allowed him to survive in a comatose, entombed state for several millennia. Released by an ancient cult in 1983, he assembled his new Four Horsemen (Magneto, Storm, Archangel and Psylocke) to assist him in his plan to destroy the modern world. Kidnapping Charles Xavier, also known as Professor X, Apocalypse came into conflict with the X-Men, and would have succeeded had Magneto and Storm turned against him and Jean Grey embraced the Phoenix Force to destroy him.