“Monstrum: Black Annis” explores the English folklore of Black Annis, a blue-faced hag said to haunt the Dane Hills near Leicester, and investigates whether the legend grew from real history. Using title deeds, maps, oral tradition, and John Heyrick’s 1797 poem, the video examines folklore, mythology, historical evidence, and source analysis. It introduces terms such as hagstone, anchoress, Dominican nun, Protestant Reformation, and Celtic goddess, while comparing legend with documented accounts of Agnes Scott, a medieval religious recluse. The episode supports curriculum-aligned study of world history, English folklore, religion, gender, and critical thinking by showing how cultural change, prejudice, and storytelling can transform a historical figure into a regional monster. Part of the "Monstrum" series.