" You said he used human blood to extract the cellular traits to make you human. Whose blood did he use?” Edward shook his head. “I don’t know. I’ve never known.” “What about the animal?” I asked. “He must have started with some kind of creature.” Edward cast a glance at the door, as though remembering the feel of the wild. “It wasn’t just one. He began with a jackal but added cellular traits of others. Heron. Fox. Those are just the ones I know about, but there are more—I can feel them. "

― Megan Shepherd , The Madman’s Daughter (The Madman’s Daughter, #1)