Just in time for that bloodmoon, right? Oh wait, that was yesterday.....nevermind.
Pic used: http://apoljak.deviantart.com/art/MLP-FiM-Princess-Luna-wallpaper-288839108 (credit goes to artist)

MP3: https://db.tt/8HKPFu8w
WAV: https://db.tt/P6T7krZJ