While browsing the TV listings last evening, I spotted striga [pronounced STREE-ga] in this write-up of an episode of the show Supernatural:
"Something Wicked." (2006) Sam and Dean hunt a striga, a type of witch that thrives on the life force of children, leaving its young victims prematurely aged and weak. However, it is only vulnerable while feeding. (Drama).
Italian strega 'witch' is from Latin striga 'witch', which in turn is related to strix 'screech-owl'. Life force is a calque (or loan-translation) of the French elan vital coined by Henri Bergson.