Long before the age of man they walked our planet:

THE TIME GUARDIANS

In the ages of the ancient advanced civilizations the presence of the Guardians of Time was recognized with respect, reverence and humility. Over the millennia a new mystery was formed and only a few chosen ones, like high priests, spiritual masters and shamans were granted to study it. They were the ones that got a deeper insight in the secret of THE TIME GUARDIANS. The beings were referred to as visitors from other systems, protectors or destroyers and even gods.