Fire-berry

"Every morning a bird brings me a fire-berry from the valleys of the sun, and each fire-berry takes away a little of my age."

―Ramandu

A fire-berry was a magical bright red berry, which came from the valleys of the Narnian sun. Each morning, as Caspian X observed on his voyage to the end of the world, white sunbirds came out of the sun to eat all the food which lay upon Aslan's Table. One of the white birds brought a fire-berry for the star Ramandu to eat. Ramandu said that each fire-berry took away a little of his age. This would continue until the star was as young as an infant, at which point he would resume his dance in the sky.