"Every Martian of age had one-- received after completion of the Journey of Souls. A spiritual conduit of sorts-- it connected the past to the present. A massive memory core, downloading our ancestral memories into the consciousness of all who came next. The medallion was the last vestigial trace of a people whose history was once preserved orally-- but who had developed an ability for telepathy that became our greatest achievement-- and our ultimate curse when a plague annihilated our race, one thought at a time."
First Appearance: DCU: Brave New World #1 (August, 2006)