 This has caused the Polypontians to break up and many civil wars have started to take their place with the defeat of the Polypontians at the end of the second book, The role of antagonist then settles on Erinor of Artemision and her Tri-horns (Triceratops used as command platforms/siege weapons, similar to war elephants), and Oskan's father Cronus, his Ice Demons and his granddaughter, Medea.Erinor's dinosaur cavalry move in on what remains of the Polypontian Empire, fully intending to move on to the Icemark afterward.Responding to a plea for help from the Empire, a reluctant Thirrin leads her army into the heart of what was once enemy territory.