From the personal notes of Larissa Moonshadow, tiefling scholar:
The Age of Myths
In the Age of Myths, the gods walked the earth. Mortals vied for their favor, and were gifted with artifacts of untold power. The first Elven War was waged and won; and the elves left their homeland of Fayre in order to dwell in the world as mortals. Creatures of monstrous might and exceeding strangeness were defeated and destroyed by the first chosen heroes, and their like has not been seen in this world before or since.
((More history from this era still remains undiscovered))