Isn’t the Brothers Grimm fairy tale "Hansel and Gretel" of the same theme? A witch trying to trick the children and fattening them up so she could eat them? Edit: I guess the Disney movie “Hocus Pocus” is displaying a lot of similar themes as well, now that I think about it. Witches sucking the life force out of the children to stay young.. Adrenochrome? “Stardust” is a bit similar but they eat the heart out of a fallen star to regain their youthful complexion.