The world of Thamwren is on the brink of change.
With its people whispering about a mysterious substance that draws out unheard of power, warring kings, and more people being sent into the Empty Sea, Thamwren is more dangerous than it's ever been.
The people call it rhydos, a potion made out of the very plant that saves lives, but there are rumors that, when made correctly, it creates immense power. Fire and ice just from thought. Rhydos' introduction creates new alliances, new friends, new opportunities, but the more known about it, the more the people of Thamwren find themselves split.
Rhydos threatens to break an already broken world. Why not let the chaos win?
In the epic conclusion to the Devil's Deal series, Freya has one final chance to discover the full potential of her own power, and to use it to restore balance in the universe - once and for all. After the destruction caused by Roisin, Ferya and Torix come to terms with their losses and mistakes... And prepare for a final battle that will change everything.