[Best keep the blood magic a secret as long as possible, unless Yaha wants an extremely unpleasant reaction. As it is now, the agreement has him somewhat calming from his prickly caution.]

Our realities may not be so different. It's believed elves were once more plentiful than any other race, but they were overtaken by the invasion of humans and forcefully enslaved. [History isn't his highest interest. He doesn't care for what may have happened in the past; it doesn't change the present.] You managed to survive. How?