Schwanensee

Lily and Sirius have been trying to unite their kingdoms through a wedding between their children but it's not working. Harry, Lily's son, and Cristal, Sirius' daughter, simply hate each other. It is when this love blooms that the kingdoms are torn apart by Lord Voldemort and Harry loses the thing that makes him so very powerful—his own heart. Can Cristal return his heart to him?