The human body is a remarkable machine, but it doesn't just run on energy. Ask any dietologist: it requires vitamins, minerals, and a plethora of other substances in specific doses to run at peak efficiency. So what, pray tell, does a supernatural or alien being require to operate at its normal, super human efficiency? Why, humans! Oh, and in case it isn't obvious, expect the Horror Hunger to be used as a metaphor for addiction. Examples of Horror Hunger include: