She couldn’t explain how she had one day been playing her lyre, and her horn began to glow softly, a strange globe of golden light at the very tip. A new song flowed out of her, sounding the strings at its whim. She suddenly felt a one-ness with Equestria as the pure melody—far beyond her prior talents—flowed forth from the wooden instrument. It was only when the song was finished that she discovered the new markings on her flanks, as pure a gold as the delicate leaf on her instrument.