Claws of Death by Angelina J. Steffort

“Together, Ayna… Together, we’re eternal.”
Trading one prison for another, one kingdom for the next—there’s no escape for Ayna.
Myron is free, but freedom comes at steep cost.
Back in Erina’s gilded prison, Ayna has one goal: escape. But with the King of Tavras holding her captive and her sister’s sacrifice keeping her from running, she’s forced to play a dangerous game. If she fails to outmaneuver Erina, she’ll never break free. But waiting for Myron to return might risk everything they’ve fought for.
As long as Myron remains free, there’s still hope.
While Ayna fights to stay strong, Myron is racing to save what’s left of his court. With the help of a fairy princess and an Askarean general, he prepares for the looming threat of Tavras, armed with magic-suppressing weapons. But Tavras isn’t the only enemy. The Flames still seek revenge, and without a powerful ally, Myron’s court is doomed. An ancient enemy might just be the ally he needs.