This Saiyan was a man by the name of Yamoshi. He was gifted his power from that of five righteous Saiyans, but was unable to stop the evil Saiyans due to losing his power before the job had been finished. According to Shenron, a Super Saiyan God once appeared on planet Vegeta in response to the growth of the evil Saiyans. Like the traditional Super Saiyan transformation, the Super Saiyan God originated as a tale told in Saiyan mythology about the god of the Saiyan race.
Yamoshi, the Super Saiyan God of ancient lore.