Dumped by My Ex, Chosen by the Dragon King

Cecilia spent seven years as a servant in the Leon family, a half-blood overlooked by her husband Leon, the heir to a famed magical line. Forced to brew potions and bear constant humiliation, she also watched her half-sister Lilian win Leon's heart and turn her own daughter against her. The moment she signed the divorce papers, the egg her in-laws had mocked as worthless hatched to reveal Loki, an ancient Dragon Lord who had waited six centuries for her. Now she is being reborn as Luna Sera, a magical prodigy, and the people who once scorned her must bow to her, while Leon begins to see what he threw away.