Igniting Spirit by Regan Claire

Della Deare spent most of her life unable to rely on anyone but herself. Until she discovered a family she never knew and a destiny she never expected.

Now, her cousin is in danger and Della will do anything she can to save him, even if that means betraying everything she's been taught. She knows the Clades — her enemies — are the only people who can help, but they want something from her first -- Protection.

There's a different evil afoot, larger than anyone had anticipated, and to stop it the Clades and Elfennol need to band together. Della must rely on old enemies, new friends, and the dark power that Ezra has inherited before his father unleashes destruction on our world.