Part 25: Chronopolis - Chrono Cross Guide - IGN

Once everything is done, go to the Dead Sea Ruins (Home), and interact with one of the three glowing points in the water.

Part 05: Nikki's Path - Chrono Cross Guide - IGN

Part 25: Chronopolis - Chrono Cross Guide - IGN

Part 25: Chronopolis - Chrono Cross Guide - IGN

Part 05: Nikki's Path - Chrono Cross Guide - IGN

Part 27: Into Terra Tower - Chrono Cross Guide - IGN

Part 25: Chronopolis - Chrono Cross Guide - IGN

Part 28: Terra Tower - Chrono Cross Guide - IGN

Part 23: The Dragon Tear - Chrono Cross Guide - IGN

Part 25: Chronopolis - Chrono Cross Guide - IGN