War of Two Queens (Blood and Ashes 4)

From the Despair of Golden Crowns...
Castille Da'Nier knows all too well that no one is more cruel and calculating than the Bloody Queen. But no one, not even himself, can imagine what she is hiding. What she has done is almost unthinkable.

Born of mortal flesh...
Nothing will stop Poppy from freeing her King and destroying all that the Bloody Crown represents. With the power of the Ancient God of Life's guardians and the support of the wolves, she'll have to convince the Atlantean generals to start a war her way-there can be no backing down this time. This is the last hope for a future in which the two kingdoms will live in peace.

A great ancient power is rising...
Together, Poppy and Castiel must embrace old and new traditions to protect their loved ones and those who cannot protect themselves. But the war is only the beginning. Ancient forces are stirred, ready to unleash an unseen horror that began millennia ago. To put an end to what the Bloody Queen has started, Poppy must become what the prophecy foretold - what she fears most.

As the Harbinger of death and destruction.