A stronger, smarter shadow returns to the Morton attic. Peter and Nix prepare with mirrors, charms, and protective powders, working in perfect coordination. The battle is fierce as the cunning creature adapts and strikes back, but trust and strategy turn the tide. Trapped in reflected light and magic, the shadow finally dissipates at dawn. Victorious but wary, Peter commits to learning the gremlins’ hidden history, embracing his role as Nix’s partner and guardian against future darkness in Greendale.