As Tentagon drains Éire and targets Fomoire, Roo, Umba, and Metric reunite with family and uncover Holt's power. With Balor's help, they must stop the Blight before Branock wins.

Roo, Umba, and Metric unite Fomoire's forgotten inhabitants for a final battle. As Jeannie unlocks Holt's power they must harness Super-Holt to defeat Branock and free the universe