Crossing Paths Finding no adamantine left on the original mountaintop, Heron and his friends discover that the Keres are feeding on survivors of Heron’s polis in the mines. They are nearly overwhelmed until Heron summons lightning to kill all the Keres but one, with a warning to only feed on the dead. The survivors’ leader suggests that Elecktra was buried in their graveyard for fallen heroes. Demeter confronts Hades over his conspiracy but offers to remain silent if she, Hades, and Persephone rule as a triumvirate when they win Gaia's challenge. Heron finds Seraphim passed out from his wound, not recognizing him in his human form, and revives him. After recovering, Seraphim refrains from murdering Heron after overhearing him confess his desire to save Seraphim. Heron discovers adamantine in the engravings on Elecktra’s grave. Gaia releases her summons to the hidden realm, where the contenders will face three challenges for the Eleusinian Stone.