X-Men: Apocalypse: Comic Book Origins of The Four Horsemen

The inclusion of Apocalypse/En Sabah Nur's Four Horsemen is an exciting turn for the franchise.

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Famine (Horseman of the Apocalypse)

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Marvel Reveals the Heartbreaking Secret Behind Apocalypse's Villainy - IGN

X-Men: Apocalypse

Powers of X #4: All the secrets, hidden references, and sinister plans - Polygon

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X-Men: Apocalypse: Comic Book Origins of The Four Horsemen

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