The Ember and the Throne. Fire and Metal, #3

Two years have passed since the repeal of the Laws of Suppression, and Aethelgard is healing. Grand Warden Elara and Commander Seraphina have built a life in the light, but shadows linger in the corners of the map. When a miner returns from the forbidden north with eyes full of violet fire and a warning of an awakening god, the peace they fought for begins to fracture. Journeying to the heart of the Whispering Peaks to seal a breach in reality, Elara faces a loss that shatters her world.
Driven by a grief that defies reason, she turns to the forbidden Codex of the Void, risking the safety of the kingdom to rewrite the laws of life and death. But the Void extracts a heavy toll, and the thing that returns from the grave is not the hero who fell. As a crystalline corruption consumes the land and a monster wearing a lover's face stalks the capital, Elara is forced to make the ultimate choice.
To save her people from the darkness, the Ember must do the one thing fire fears most: let herself go out.