According to the J.R.R. Tolkein’s cosmology of elves, the Eldar who lived with Valar in Aman “were also called Calaquendi (Elves of the Light).” The Eldar developed their faith in magic and became magical elements in the tail of a powerful comet. As long as the Eldar drove the comet, the comet would not die. Because they left Aman, these elves did not live in the world of Arda and were subsequently unkown to the inhabitants of Middle Earth. These comet-dwelling Eldar sailed through the universe, developing new weapons and magic until they attracted the attention of an enemy.
Carrot Ranch Literary Community August 16, 2018, prompt: In 99 words (no more, no less) write a story about a comet. You can consider how it features into a story, influences a character, or creates a mood. Go where the prompt leads.