The Last Flight: A Dark Dragon Romantasy of Forbidden Bonds, Academy Trials, Ancient Magic, and a Morally Grey Enemy Rider (The Firebond Trials) by Ariana Valewood

She failed the trial. Then a dead dragon chose her. Mira Veyr has been ignored by dragons twice. At Drakethorne Academy, a third failure does not mean bad luck. It means proof that she was never meant to fly. So when Mira steps into the Ember Ring for her final choosing, she expects humiliation, exile, or worse. She does not expect the flame to die. She does not expect the mountain to crack open. And she definitely does not expect Aurelix, an ancient dragon everyone believed dead, to rise from beneath the academy and answer her blood. Riven Ashkeir was sent by the capital to watch what happens after the choosing. Cold, controlled, and trained to serve the laws that keep dragons obedient, he should treat Mira’s impossible bond as a threat. Instead, when the academy moves to sever her from the dragon, Riven breaks command and helps her run. Read more