Reaper of Souls by Rena Barron

After so many years yearning for the gift of magic, Arrah has the one thing she’s always wanted—at a terrible price. Now the last surviving witchdoctor, she’s been left to pick up the shattered pieces of a family that betrayed her, a kingdom in shambles, and long-buried secrets about who she is.

Desperate not to repeat her mother’s mistakes, Arrah must return to the tribal lands to search for help from the remnants of her parents’ people. But the Demon King’s shadow looms closer than she thinks. And as Arrah struggles to unravel her connection to him, defeating him begins to seem more and more impossible—if it’s something she can bring herself to do at all.