"A 10-billion-year-old race of Multusians who migrated to the planet Oa, the Guardians created the Green Lantern Corps to serve as their universal peace-keepers. After falling at the hands of their greatest emerald warrior, Hal Jordan, the last Guardian, Ganthet, gave the only remaining power ring to Kyle Rayner of Earth, the last of the Green Lanterns." *Source: Card Back