What is the purpose of the story cask of amontillado?

"The Cask of Amontillado" by Edgar Allan Poe explores the themes of revenge, betrayal, and deception. The story reveals the dark and twisted nature of the protagonist, Montresor, as he seeks vengeance on his perceived enemy, Fortunato, in a chilling and calculated manner. Ultimately, the purpose of the story is to showcase the destructive power of obsession and the consequences of harboring hatred and resentment.