Dominion of Darkness

In a land where Light and Shadow are bastions of power, the Draska are healers and magicians of the Light. Elainya and her beloved Drenil serve in the court of King Cydril. But Cydril covets Elainya for his own.
  When the king threatens Drenil’s life, a mysterious traveler helps the couple escape. But not all helpful travelers can be trusted.
  Eighty years later, Elainya awakens as if from a restless night’s sleep. She is greeted by Nian, servant of the traveler-demon known as the Shadow Lord. Nian informs her that her beloved is dead, the kingdom at war, and the Draska destroyed by a plague that only she could have prevented.
  Caught between the powers of Shadow and Light, Elainya must find a way beyond her grief to defeat the demon, redeem the kingdom, and restore a magical race doomed by her own desperation.