Arithon must seek the heartcore of his talent, even while embroiled in a savage battle against those he has vowed to protect. But treachery strikes from deep within the duke's ranks. Lysaer's fanatics will be unleashed to claim their bloody revenge. With the Fellowship Sorcerers in mortal danger, and all under threat from a collapsing grimward, Davien the betrayer is unable to intercede to save his colleagues and so will be forced to invoke the dire terms of an ancient and most secretive bargain.