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Dragonheart - timeline
A peasant revolt leaves tyrannical King Freyne dead. Einon inherits the crown just before receiving a fatal blow to the heart. Queen Aislinn brings him before a dragon, Draco, who shares his heart with the boy and saves his life.
Bowen is forced to kill Draco in order to kill Einon. Draco turns to energy and joins his ancient brothers in the constellation Draco.