Triumph Of The Darksword by Margaret Weis

A young man born without magic in a world defined by sorcery must embrace the mysterious weapon he has become linked to and race across fractured realms with a small band of allies to confront the immortal powers that oppress his people; as long-buried secrets about his origins and the nature of life and death are revealed, he is forced into wrenching choices and a climactic confrontation that will reshape the balance of power and determine whether a new, more humane future can arise from a world built on magic.

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