Several thousand years ago, the wizard Shazam, who at that time, was known as the Champion; created the Rock of Eternity from two large rock formations — one from Heaven and one from Hell — to hold the "Three Faces of Evil", a dragon-like demon, captive.
The Rock of Eternity is a nexus of power in a nearby realm of existence that channels power to anyone utilizing the power of the wizard Shazam. It is a way station of power. As the Guardian of the Rock of Eternity, Marvel is now one with the Rock as it is apart of him. He channels the energies of the primal God-wave and the Greek Lords of Magic through the Rock of Eternity.[?] As such he is infused with the duty to keep the power and the magic of the earth realm in balance. As keeper of the Rock of Eternity he also holds the dark forces at bay.
- From the 1981 Shazam cartoon
- The Seven Sins: Lust, Gluttony, Greed, Sloth, Wrath, Envy, and Pride, were embodiments of the particular sin they were named after. They were held captive in the Rock of Eternity, where they were looked after by Captain Marvel, who was being driven mad by their voices.