Have you ever wondered if the Elements of Harmony exist outside of Equestria? Well, they do. As Equestria loses its grip on kindness, loyalty, laughter, and other positive traits, it gains negative traits along with it.. As the Elements are based around the existing harmony, its powers are weakened, and therefore Equestria's defenses are weakened, too. Princess Celestia must call upon another universe's powers to aid them.