Ahriman

ripvanwormer's picture

Ahriman is a Zoroastrian god of anger, death, disease, fear, and hate. He is chaotic evil. His brother and opposite is Ahura Mazda.

Sources: 
Dragon magazine #12
Dragon magazine #288
Planescape, Dungeons & Dragons, their logos, Wizards of the Coast, and the Wizards of the Coast logo are ©2008, Wizards of the Coast, a subsidiary of Hasbro Inc. and used with permission.