And no sooner than we had completed our rituals and begun to discover our new-found powers, the Daedra Lord Azura appeared and cursed us for our foresworn oaths. By her powers of prophecy, she assured us that her champion, Nerevar, true to his oath, would return to punish us for our perfidy, and to make sure such profane knowledge might never again be used to mock and defy the will of the gods. But Sotha Sil said to her, "The old gods are cruel and arbitrary, and distant from the hopes and fears of mer. Your age is past. We are the new gods, born of the flesh, and wise and caring of the needs of our people. Spare us your threats and chiding, inconstant spirit. We are bold and fresh, and will not fear you."
And then, in that moment, all Chimer were changed into Dunmer, and our skins turned ashen and our eyes into fire. Of course, we only knew at that time that this had happened to us, but Azura said, "This is not my act, but your act. You have chosen your fate, and the fate of your people, and all the Dunmer shall share your fate, from now to the end of time. You think yourselves gods, but you are blind, and all is darkness." And Azura left us alone, in darkness, and we were all afraid, but we put on brave faces, and went forth from Red Mountain to build the new world of our dreams. --http://www.imperial-library.info/mwbooks/battle_redmountain.shtml