Scale of the Dragon by Richard Fierce

Mina is an outcast. A childhood accident left her scarred and with a curse that her master exploits to hunt dragons for sport.
She wants freedom, from both her master and the curse, but unless the right dragon is killed, she'll be a bondservant for the rest of her days.
With Mina's uncanny ability and her master's magical strength, the beast responsible for her misery will fall ... even if she has to take matters into her own hands.
Scale of the Dragon is the first episode in the series Marked by the Dragon.