The tale type ATU 302, "The Giant (Ogre) who had no heart in his body" or "Ogre's Heart in the Egg", is as "world folklore tale type". These stories tell of a villain who hides his life force or "heart" in a place outside his body, in a box or inside a series of animals, like a Russian matryoshka. The hero must seek and destroy the heart to vanquish the villain. With the help of the villain's wife or female prisoner (a princess), he locates the ogre's weakness and, aided by grateful animals or his animal brothers-in-law, destroys the heart.