King Slayer (Witch Hunter Book 2‪)‬

The usurper
Elizabeth Grey's former master Blackwell, now revealed as terrifying dark wizard, has crowned himself King of Anglia.
The healer
And little did she expect that handing over the powers of her stigma to save the life of the boy she loves would change him beyond all recognition.
The assassin
With only her own strength and skill to rely on now, can Elizabeth hope to overcome Blackwell?
And must she sacrifice herself in the attempt?