[He hesitates, weighing the options. Then he nods, shifting the swords in his grip so the one that Koschei promised would protect his senses from Baba Yaga's magic is closer for her to take.

The blades he was warned should not be parted - but if he has to choose, he'd rather risk losing that one, than the one that might enable him to find her at all. He's trusting Lydia not to be the type that will steal the swords away for a lark. So far she has seemed kindly and innocent enough to him.]

She steals the lives of some, bewitches others. She took the heart of the one who sent me on this quest - he wants hers given to him in return.