The Dark Kings Downfall

Ethelinda is just a normal human in a world ruled by the fear of the Others, Vampires, Werewolves, Fae, Fairies, Witches. The humans live in constant fear of being taken, people have been disappearing and turning up days to weeks later, strange things happening to their now dead bodies.
Changes are happening in Ethelinda's body, and its. All. Their. Fault. Her eye site better than is humanly possible, her speed increasing, her beauty unchallenged, her hunting and fighting abilities inhuman. The witches took Ethelinda as a young child. They experimented on her, mixing her blood with all the Others, High Fae blood from the seeli and unseeli courts, Alpha werewolf blood from each pack, Fairy royalty blood from each kind of fairy, vampire blood from the oldest vampire still alive, and blood from a Great White Witch. As the days went by, nothing happened in young Ethelinda's body, except that her hair went from golden like her mothers, to a blackish blue so dark, even the witches were jealous, and her eyes changed colour. After a few more days, the witches decided that nothing more was going to happen, so they returned her to her family. Years later and the changes have began again, and no one can tell her what's happening but the witches who made her.