Demonic Storm
http://www.drstrange.nl/coh/id/ID_DemonicStorm.jpg
Demonic Storm was taken from a dimensionwhere the old ones resided. Selwyn Strange took him from his dimension to guard the portal, this portal is knownby another name however his real name should never be uttered amongst mortal men, he is known as Azarath.
Azarath and Demonic were created in the same dimension, they were never born and are the only two of their race. They act as Yin Yang to each other holding each other in place. However they are mortal enemies and will try to destroy each other to the bitter end.
Each demon vies mana from eachothers life force to fight and survive so what happens to one happens to the other, the unfortunate side effect of this is that if Azarath were to be destroyed, Demonic would also leave this realm and his life would return to the life stream.
