Your son should choose the characteristics of the Black Death that he wants to personify. Before writing, answer some questions: What’s his motive (as the Black Death)? How does he feel about the “work” he is doing? Does he have a visible form or is he invisible? If visible, how do humans see him? Try to keep the personification consistent throughout. Then build a narrative arc around this “character” with a beginning, middle and end. Perhaps tell the story of visiting on a particular family. What does he learn from the experience? What is the point (thesis)?