Prisoner of the horned helmet

the long version

"In an age before Atlantis rose, an age rife with sorcery and violence, the earth trembled beneath the all-conquering hoooves of the Kitzaak Horde, and only one man, Garth of Baal, dares to confront the Kitzaak lances, to stand between the never-defeated armies and the lush valley that will, long millennia in the future, be known as the Mediterranean Sea. To save the peaceful People of the Forest, Gath must dice with the gods, and the price he must pay is to become death made flesh, the Prisoner of the Horned Helmet."--Back cover.