This is the story told, that all the civilizations call “The Fall of Light”
“Once, in the before-time, the vault of the heavens was blue. The Lord of Light’s golden vessel shine high at noon in that last moment. Then the Great Darkness descended. It consumed the sea and sky. It devoured hope and the very souls of men. For a year a day we dwelt in darkness, forelorned by the gods and at the mercy of the underworld. The drow and deugar slaughtered their kin while civilization was ground to ruins as the crops, forests, fish, and game died away.
Only by divine blood could the veil pierced. The Light Bringer’s sacrifice permitted the Lady of Mysteries to renew the gods’ connection to this land. Though faintly, the priests could once again hear their patrons – all save the Scions of the Light. Their lord no longer walked among the heavens. But then there arose from Kalithor a beacon, radiating hope for those clinging to life within and about her walls. So it came to pass that the city and others like it became as islands in a sea of eternal darkness. The final gift of the Light Bringer had come to dwell among men."