Book Appearances: The Lion, the Witch and the Wardrobe Prince Caspian
Overview: Susan’s horn is the magical horn Father Christmas gives Susan, whose blast brings help in times of greatest need.
In the story
Susan’s horn is one of the most narratively useful gifts in the series because it bridges books. In Prince Caspian, the horn’s call is what draws the Pevensies back into Narnia centuries later.
That makes it more than a keepsake. It is an object of recall, rescue, and continuity between ages.