"We could practice together?" Luna offered with another smile as she turned and led Katherine inside the castle. The doors opened with a faint blue glow of the alicorn's magic and she walked on in.
"You asked what I was jealous of, why I would attack my sister," she then began without much hesitation. It both was painful for Luna to discuss and healing to make known. "A very long time ago my sister, Celestia, and I came into ruling over the entirety of Equestria. She is gifted with the most magic, more powerful than I, and her magic aligns with the sun and the day. Mine with the moon and night." Luna made a passing of her hand and the grand foyer they entered of the castle glimmered in the stars of light the princess produced. Twinkling dots lined their path up the stairs and to the right, toward the princess's tower.
"There are, for the record, princesses of other powers. Cadance of the Crystal Empire, her magic encompasses love. There is also newly appointed Twilight Sparkle, her magic embodies friendship."