Inside the Cloud Mark Cave in the Divine Land.
Ye Yun had once seen one of the Eight Great Black Dragon Kings, who served under the Dark Heavenly Dragon of the Ancient Times, when he broke the restrictions around the Black Stone Treasury. Of course, that was merely a wisp of the Black Dragon King's will.
From the Black Dragon King's description, Ye Yun learned that after the incident with the Moon Star, the Dark Heavenly Dragon of the Sumeru Dark Realm had led all its clan members in an all-out assault on the Divine Land. There, they engaged the three Divine Kings in a world-shaking battle. Later, one of the Divine Kings used the Blood-colored Broken Sword, which sealed the Ancestor Dragon, to sever one of the Dark Heavenly Dragon's claws. The Dark Heavenly Dragon fled, wounded, and vanished without a trace.
According to the Black Dragon King, the Sumeru Dark Realm should have been empty. So why were spirits invading now?
