Writing a magic system can be fun, interesting, and challenging at times. Each magic system will have its own rules, patterns, quirks, and exceptions. A reader might never know all of them, but it is essential for the author to know each and every one so they can write from a place of knowledge, understanding, and authority.
Write a story based on this prompt. The best will be published here with accreditation. "There was a candle that never lost its flame. Everyone thought it was magical. You go to visit it and for the first time in over a hundred and fifty years, it goes out."