Aflame by Roseanna M. White

In a land of fire and ice, love is considered a weakness.

Princess Valkyrja has always been deemed “pretty and useless” by her family, who rule the kingdom of Fjordlandi. Though she has the same magical Blessing over ice and snow as her brother, sister, and father, she can never seem to use it for the brute-force ruling they require, choosing instead to make art that makes her people smile. But when a horrific attack shakes their whole world, she has to step up…and find a strength she didn’t know she had.
Nikanor has lived his life under the greenhouse domes, a commoner with no opportunities to do things he most desires—to study the Words or the law, to be something other than a farmer. When he and his best friend follow his father to the capital, he hopes only for a nice holiday. Instead, the attack throws him into the path of a princess, and his world is never the same.
But the Blessed aren’t the only ones with magic in Fjordlandi. There are others already Awakened in the volcano, those called the Cursed, with lava in their veins and rebellion in their hearts. And once the fires of revolution ignite, they won’t stop until all of Fjordlandi is Aflame.