Of Blades and Wings by Eliza Raine

Princess Madivia is broken. Her fae magic doesn’t work, her illness will kill her, and nobody knows she exists.
So when the gods select her to leave her tower in the Ice Court and train to be a Valkyrie at Featherblade, she is sure they’ve made a terrible mistake.
So is every other fae at Featherblade. All except the disgraced fire-fae Valkyrie, Kain. His burning gaze never leaves her. Nobody knows what he did to have his wings taken away, but he is as dangerous as the deadly world Maddy has been drawn into.
And she has the key to his revenge.
If he discovers her secret, it won’t just be Maddy’s life that is in danger. She knows she should avoid him.
But, the only thing harder than becoming a Valkyrie? Conquering her searing fascination with the unhinged fire-fae.

If she is to survive Featherblade, she must earn her wings. If she is to survive Kain, she must make a choice that could burn their world to ash.