Across X-Men history, there have been many different versions of the Horsemen of Apocalypse - typically a group of four mutants enhanced by the villain's Celestial technology and brainwashed into his service.
Across X-Men history, there have been many different versions of the Horsemen of Apocalypse - typically a group of four mutants enhanced by the villain's Celestial technology and brainwashed into his service.