"There was a sudden shout and the chilling blast of a hunting horn. The dragon's heart sank. The soldiers had spotted him. This truly was the end." In his boundless quest for power, Lord Jezail has unearthed the terrible sword, Dragonslayer, from the depths of Edinburgh Castle, where it has lain buried for centuries. But the sword has its own agenda and, ensnared by its magic, Jezail becomes obsessed with the idea of killing Arthur, the MacArthurs' wonderful dragon, and attacking the fabled Valley of the Dragons. His actions so enrage the Lords of the North that they set off after him, as the World of Magic finds itself on the brink of war. Can friends and foes unite to save the world they know and love? What is Count Vassili's secret? And how did Arthur end up with the MacArthurs in the first place? Witches, wolf people, MacArthurs and magicians join forces with Neil and Clara MacLean in this final dragon-filled adventure (book six in the Dragonfire series).