The Razehunter

The Danish nation of Gedra is under attack by a disease so great not even the black death could compete. It infects by touch and turns its victims black with hate.  They call them Blooddevils, a demonic entity built in the image of a demon that will stop at nothing to kill everyone and everything in their wake. Worse still, They're impossible to slay.  All seems lost until a friendly Witch proposes a plan amidst the ashes to preserve human life in Scandinavia.
The plan: The Razehunter-A war machine chosen from the most unlikely places: young girls.  The Witch crafts a potion for the chosen to consume, which should make the Hunter invincible. Then, a strange request: the girl will be wed to the young Prince David. She will bear the prince's young and continue the bloody cycle until every last demon is destroyed.  But Rosemary of the Jalatto is one stubborn girl.
She doubts everything and everyone. She's rebellious and erratic, and ultimately, she will only answer to one.  God.  Even so, the Devil has more than enough tricks up his sleeve to plunge the world into hell and destroy everything once and for all. He is the king of deceit, no less, and the fruit of love is a powerful thing. After all, it was Eve who convinced Adam to take that forbidden fruit.