 After the Didact's exile, things continued to deteriorate on the Forerunner political scene.To remain seen as an asset to the Master Builder, the Librarian proposed an expedition to a local galaxy known as Path Kethona to learn about the Flood's origins.Legend dictated that 10 million years ago, ancient Forerunners journeyed to Path Kethona, but actual records detailing this journey had long since vanished.