A century after dragons abandoned humanity, the impossible happens. An ancient obsidian dragon returns to Hogwarts—but instead of choosing the heir to the famous Riddle dragon-riding bloodline, he chooses Y/N. Forced into an uneasy partnership with the arrogant Mattheo Riddle, Y/N must master dragon riding while uncovering why dragons are disappearing and why the East Court is preparing for war. As kingdoms fracture and long-buried secrets emerge, the fate of both dragons and humanity may rest in the hands of two people who can barely stand each other.