The Calorians had prayed to their sacred tree spirit Ka-Ma for help in getting rid of Dryg, a monstrous creature that had been terrorizing them. Little did they know, it was the Guardians of the Universe that responded to their distressing plea and they sent their champion, Green Lantern, to combat this creature. The Guardians sent Green Lantern to the planet Calor to help these Calorians. The Calorians led Green Lantern to a volcanic valley which served as the home of Dryg. Green Lantern defeated Dryg and the Calorians showed their appreciation by thanking their wonderful tree spirit.