The sprite was sitting on a thick limb with catlike nonchalance, steadily combing her long tresses. Her comb was the rusalka’s greatest treasure, for if her hair dried, she would die; but the comb could conjure water anywhere. When she looked closely, Vasya could see the water flowing from the comb’s teeth.
Kind of reminds me of the magical comb from The Grimm Legacy by Polly Shulman
