The Night Parade: Forgotten Realms: The Harpers, Book 4 (Unabridged‪)‬

"The dream was always the same. Myrmeen looked up and saw she was an adult dressed in silver armor with a phoenix headdress."

When a war against the Night Parade proves too much for her, Myrmeen Lhal, the ruler of Arabel, enlists the aid of the Harpers to win her battle against this group of creatures who gain sustenance from human fear.