A story that ends up by saying the wind blew up on the mountain and we all died.

What literary device is used in this story's ending?

The literary device used in this story's ending is foreshadowing. Foreshadowing is a technique in which an author gives a hint or clue about what is going to happen later in the story. In this case, the mention of the wind blowing up on the mountain implies that something catastrophic is about to happen. This creates tension and suspense, making the reader wonder what will happen next. The final revelation, that "we all died," comes as a surprise, yet it also feels inevitable given the earlier foreshadowing.