“You have been warned.” So read the tagline for the scariest hit of 1976, The Omen, which featured an unexpected embodiment of the ultimate evil: a young boy. Damien, the Antichrist (played by Harvey Spencer Stephens), was just an ordinary kid—except, you know, for all of the death and mayhem that followed him (including his mother, his unborn sibling, his nanny, his priest…).