The world is dying, and she might be the key to saving it.

In the divided realms of Arien and Sykandor, life is fading. The Bone God's curse ravages the lands, draining the mage courts' magic and leaving the warrior territories barren. But legend tells of the White Raven, a relic of the gods that could restore balance to the realms. Every five years, five mages and five warriors-the Summoned-are chosen to enter the Bone Temple to retrieve it. None have returned.

Seventeen-year-old Vaidryn Eldergrove was never meant to be summoned. Untested, uncertain, and with barely a flicker of magic, she's the least likely to survive. Yet when the Summoning Sphere chooses her, she's thrust into a deadly journey alongside her fellow mages and Sykandor's fierce warriors-most notably Casimir Brenvar, her reluctant partner. He warns her not to enter the temple. But the darkness inside Vaidryn is awakening... and it remembers things she's locked away.

As her magic rises and the temple walls close in, Vaidryn must confront the truth of who she is, what she's capable of, and the god who has been watching her all along.