Precursor (Earth-8725)

The Precursors were an ancient advanced sentient species whom were classified as Tier 0 in the Forerunner Technological Achievement Tiersm capable of traveling between galaxies and conceiving life. The creators of both Forerunners and Humans, the Precursors choose the latter to claim their Mantle, which did mean Humanity would guard and protect the galaxy. This action would extremely frustate the Forerunners, that then waged war against their creators that took both species to beyond the Milky Way, to the Andromeda Galaxy.

The surviving Precursors would later hide in the depths of the Andromeda Galaxy and convert themselves to an powder form until they could be strong to return once more. However, after millions of years, the powder became defective, infecting and corrupting the Precursors, until this infection would become the parasictic species known as the Flood.