The Enchanter’s Soul by Michele Notaro

Many fall as the last enchanter rises…
The first line of the ancient prophecy keeps playing over and over in my head, but I’m afraid to remember the rest. I don’t want to think about what’s coming for us—what’s coming for him. I’ve been keeping Brinnswick safe for years; I’ve been keeping my coven safe my whole life; and now I was responsible for keeping Sebastian safe, too. It shouldn’t have been a problem, he was my vitmea viramore, after all, and I was used to having the weight of the world on my shoulders.
What Seb doesn’t know is that everyone in the magical community is after him—even if they don’t realize it yet. They’ve been looking for him for centuries; not only for him, but for his soul. But they never counted on him having me. I will protect him with my every breath and take down anyone that gets in our way. His soul belongs with me, not in the arms of evil.