Unbonded (First of the Blade #1)

Taught to fear magic. Trained from a young age to destroy those who wield it. The First of the Blade Series begins.
Trained to destroy sorcery from a young age, Imogen Inaratha left that life behind, having come to see magic differently. When her brother asks for help, she embarks on a dangerous journey—and must face a part of her past she wanted to forget.
An encounter with one of the mythical Porapeth changes the course of the journey. Protecting him forces her to face dark magical creatures and a powerful sorcerer determined to destroy the Porapeth in his quest for even more power.
To succeed, she must learn the truth of the blade she’d long thought she’d mastered.
She must truly become the First of the Blade.