The Venom of Luxur (Anok, Heretic of Stygia #3) (Age of Conan Hyborian Adventures)

Second of three epic trilogies set in the legendary world of Conan the Barbarian. Cursed with an unspeakable power, Anok Wati, the heretic of Set, has unknowingly unleashed a hideous evil. And unless he can find the hero within himself, and destroy a god given flesh, all of Hyboria will be enslaved.