Stags' forces have overrun the city of Nuuma. But just when it looks like the fourth Oracle Key is within his grasp, the Oracle creates a force field around the Castle and levitates it into the sky. Meanwhile, the Spider Riders help reinforce Arachna against another invasion but Hunter can't understand why the others don't want to leave to help Nuuma. Lumen reveals Nuuma is far away across a treacherous sea and fears for the safety of Arachna if the Spider Riders leave it undefended. Meanwhile, Grasshop is banished from the Big Four and all the Invectid lands for losing two Oracle Keys to Hunter Steele. When Grasshop mistakenly thinks even his family has abandoned him, he flees into the wasteland. After much debate and the timely arrival of Slate to assume command of the Arachnan forces, the Spider Riders decide to answer Nuuma's cry for help no matter what dangers may lie in the attempt. But as they leave Arachna, Grasshop vows revenge.
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