Imprisoned in Stone — Helen B. Henderson

For the crime of healing without payment, the Brethren imprisoned Dylan's soul in stone. Centuries later, he senses the touch of another's mind and hope for escape soars. However, his potential savor is unaware of her latent magic.

Cuhlwch, the current head of the Brethren plans to control any and all who have magic. Although displeased with his son, Colwynn, who like the long-imprisoned Dylan, uses his powers to heal those unable to pay the Brethren's toll, Cuhlwch orders Colwynn to father a child by a woman of the Brethren's choosing. The Brethren will have their demand met, even if it means using magic to enforce their will. Only Colwynn wants to choose his own mate--an unknown woman calls him from afar.

Caught in the middle of this tempest is a young woman trapped by fate. She has the power to free him, but her only knowledge of him comes from an eerie message on the wall and nightmarish dreams. A spell kept secret for generations.
A brotherhood thirsting for power.
Demands that cannot be obeyed.
A woman who stands to lose everything.
Four paths--one destiny
With the power to bind souls and control all magic in the balance