Fallen Angel by damnGod

Hidden away from the prying eyes of the Lord and the other archangels, Lucifer and Michael push the bounds of a forbidden love in secret. In those tender moments, Michael gazed deeply into Lucifer's fire and listened to his ambitions of a bold new way of law over the universe. Ambitions of rebellion. But Lucifer was blinded by love, and Michael's own ambitions outweighed his heart. When the time of insurrection was finally at hand, in the final hour, Michael betrayed Lucifer, siding instead with the graces of God. Engulfed in grief, pain, and rage, Lucifer embraced his most inner darkness as the two angels fought a mournful battle. The most devastating battle in all the universe that shattered the Heavens and the Earth. In the end, when the final blow was struck, the blades of the two warriors pierced each other's hearts. And while Michael was embraced by the light of God, Lucifer fell to the lowest, deepest pit. Farthest from Heaven. There in the dark, he clutches his wounds. And weeps for the love he lost.