Michael Langdon is the secondary antagonist of the American Horror Story franchise. He is considered to be the bringer of the End of Days, as well as the biological grandson and the adopted son of Constance Langdon. He is also the birth child of a ghost, Tate Langdon, and his human raped victim, Vivien Harmon. At the start of the show, he is a seemingly innocent child, but in fact, he is the Anti-Christ, as prophesied by Billie Dean Howard, and his true father is revealed to be none other than Satan himself, having used Tate as an unwilling conduit/vessel to conceive Michael with Vivien.