City of Fractured Souls by Olivia Ash

If you’re banished to the shadowy realm within Ripthorn Mountain, you die.
The mountain’s fractured magic seeps into the bones of humans, slowly draining the life from their bodies with every step they take. It has been a death sentence for as long as anyone in the kingdom of Nighthelm can remember.
And now, it’s Sophia’s fate. .
Banished to the depths of the savage mountain, Sophia and her men are left with a choice: find their way to the surface, or die.
But there are hungry beasts in the mountain. .
An ancient evil hunts Andreas, determined to end an old feud the wraith shifter had nothing to do with. And as it stalks them, ever closer, the clock is ticking for Zeke and Edric. Even with all their strength and magic, their human bodies can’t survive the mountain much longer.
But in the darkness, there’s a glimmer of light. .
In the depths of the mountain, in the farthest shadow of the darkest cavern, a young woman lies suspended in glowing crystal. Wounded and bloody, the girl stokes the depths of Sophia’s memory, reminding her of another time, of a life when she wasn’t broken. Close to death and unable to move, it’s clear the girl has the answers Sophia needs.
And now, Sophia has a new choice to make—between her mission, or her men.
Her men are slowly dying. Monsters stalk her every step. But Sophia is a survivor, and she won’t let the mountain win. .