He was from the town of Magidus in Parnphylia, and was tortured for the Christian faith in the time of the Emperor Aurelian (270- 75). While undergoing harsh torture, he heard a voice from heaven: "Fear not; I am with thee!" Thrown into a white- hot copper ox, he prayed fervently to God, and God saved him. The white- hot ox was suddenly cooled, and Heliodorus emerged alive. The judge cried to him that some sort of magic had done that, but to this the martyr replied: "My magic is Christ!" He was then beheaded and went to the Lord.