Opalessence

Abbey Shader's world split apart the moment she was summoned to Ethra, but yet another shocking revelation has thrown her into a spin and a battle she was not prepared to face.
With Wade, Zac and the Essences determined to locate the Dark Mouth - believed to be a Possession Point left behind by the Essence of Evil herself - Abbey must look beyond the past to focus on the task before her.
In the aftermath of Preo's fiery destruction, Finn Hunt and Neason Morton are enlisted to accompany Altan Gorgon on the same perilous mission south. Altan, denied support by the Gage and fuelled by a desperate desire to fulfill his father's dying wish, will stop at nothing to reach the Dark Mouth before Wade Hakes.
As the race ensues, the Dark Mouth waits, armed for a fight that no tangible weapon can hope to match.
Opalessence is the third and final instalment of The Essence Chronicles trilogy.