But his removal from Paranor was not altogether a terrible thing, for Bremen learned that dark forces were on the move from the Northlands. That seemingly invincible armies of trolls were fast conquering all that lay to their south. That the scouts for the army--and its principal assassins--were Skull Bearers, disfigured and transformed Druids who had fallen prey to the seductions of the magic arts. And that at the heart of the evil tide was an archmage and former Druid named Brona!
Using the special skills he had acquired through his own study of Magic, Bremen was able to penetrate the huge camp of the Troll army and learn many of its secrets. And he immediately understood that if the peoples of the Four Lands were to escape eternal subjugation they would need to unite. But, even united, they would need a weapon, something so powerful that the evil magic of Brona, the Warlock Lord, would fail before its might...