Renalla was one of the ancient Astrologers, and her prowess was so great that she founded a royal family, the Carians. She and the princesses of the Carians were famous for their sorcery, specifically cold and moon sorceries. With her Full Moon Sorcery, Renalla captivated the Raya Lucarian academy, and her and her family's power was so great that it could repel even the forces of the Erdtree. The stalemate was so resolute that peace could only be found through marriage between Renalla and Radagon. When Radagon returned to Leyndell to become the second Elden Lord, Renalla was left with the Amber Egg bearing the Rune of the Unborn, which she would hold so dear, to the detriment and eventual collapse of the Carians. Perhaps it was all a scheme to ruin the Carians, or perhaps it was just happenstance.
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https://beehaw.org/post/6727795
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