The legend predicts that in the end times, a last emperor would appear on earth to reestablish the Roman Empire and assume his function as biblical katechon who stalls the coming of the Antichrist.
[1] The work proposes a Last Emperor who will fight against religious enemies, most notably the then-recent spread of Islam during the Early Muslim conquests:[2] he will "go forth against them [the enemies of the faith] from the Ethiopian sea and will send the sword and desolation into Ethribus their homeland, capturing their women and children living in the Land of Promise".
[4] The concept of the Great King features prominently in mystical and folk traditions, as well as writings of people thought to have been granted gifts of prophecy or special visitations by messengers from heaven (such as angels, saints, or Christ).
[7] It speaks of this manifestation as associated by his recognition by "all Israel"[8] and preceded by the Church's ultimate trial, "a religious deception offering men an apparent solution to their problems at the price of apostasy from the truth.
The supreme religious deception is that of the Antichrist, a pseudo-messianism by which man glorifies himself in place of God and of his Messiah come in the flesh".