Child of a Dead God (Noble Dead Series #6)

For years, Magiere and Leesil have sought a long-forgotten artifact, even though its purpose has been shrouded in mystery. All Magiere knows is that she must keep the orb from falling into the hands of a murdering Noble Dead, her half- brother Welstiel. And now, dreams of a castle locked in ice lead her south, on a journey that has become nothing less than an obsession?