Evil

''I am the spirit that negates. And rightly so, for all that comes to be Deserves to perish wretchedly; 'Twere better nothing would begin. Thus everything that that your terms, sin, Destruction, evil represent— That is my proper element.''

Evil was a Celestial, but he determined that Good was wrong to create the world, Mishtar. And so he became Good's adversary, the ultimate enemy of all creation.

Evil became incarnate in Rojopotis in the form of Tiamat to give birth to the race of dragons, but was slain by the god Marduk.

Evil's followers became the fiends, who later split into two camps, of devils and demons, over a dispute over how to carry out Evil's plan. Eventually even the camps became internally divided, as their denizens feel prey to every sin and became ever more self-serving.