The Heart of the Dragon

The Emperor and his sister, the Empress, discover the location of a supremely powerful, mystical artifact known as "the Heart of the Black Dragon." However, Ang and Ling are in search of the mystical Heart of the Golden Dragon itself. With it, Ang and Ling succeed in finally obliterating the Emperor of the Darkest Ying, and break the dark Heart of the Black Dragon in the process.