The Dragon's King

For a thousand years, a line of kings has hidden a terrible secret under their castle. In defiance of natural law, they have sealed away the malevolent serpent god, Nahash, in an underground chamber. Every full moon, one of royal blood must enter the chamber to satisfy Nahash's lust for cruel pleasures of the flesh. King Erus Carus Cordis, the last of his line, must keep Nahash sealed and prevent hell on earth. Erus has no choice but to seek the help of another. A knight who may also demand the king service him on hands and knees.+