The Serpent Riders Trilogy contains Heretic, Hexen: Beyond Heretic, and Hexen II. There are three Serpent Riders, D'Sparil, Korax, and Eidolon, who are also the primary antagonists of the Trilogy.

D'Sparil, the youngest and weakest brother is slain by Corvus in Heretic. Korax, the middle brother, is slain by a hero in Hexen: Beyond Heretic (the player picks one of the three characters). Finally, Eidolon, the eldest and most evil of the three, is slain by a hero (the player picks the hero) in Hexen II.

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