Showers!

Ooh. I get it. After Amelia finds her brother she goes stomping off alone to fight Sebastian. She fails, her dragon is killed, and then her brother catches up to her in the abandoned place and they get together with Gregor and Zemia and Miranda and agree that the GZM contingent (with Watson) will lead the mass of black dragons off while Joe kills Sebastian.

Showers are wonderful things for thinking straight.