Demon Virus

Discovery
The demon Virus was discovered in 41 million BC, on an unspecified world. The first demon to be infected by the virus was Airdanexia, who soon after became the leader of the Virus Class demons. Soon after this, a war broke out with Airdanexia leading the Virus Demons, and Baroth leading the demon legions against them.

Eventually Baroth had to enlist the aid of Crisis and the legions of Undead Class demons at his disposal, as the Undead Class were discovered to be the only class, that could not be infected with the Virus. During the 'battle of Salokin', Crisis sent his apprentice, and adopted child Voto to lead their forces, as he himself went to battle Airdanexia in another location, unbeknownst to him, Airdanexia was leading the viral forces at the battle of Saolkin. Voto was able to kill Airdanexia, but not until after all of the forces of both sides of the conflict had been killed, making him the soul survivor. He was also unknowingly infected with the demon Virus.

After this, Voto was disowned by Crisis and he became the new leader of the virus demons. Shortly thereafter, Dracoryuzarn stopped the war before its damage could truly affect the demon world. Voto was then made into the Demon Lord of the Virus Class, and all surviving Virus Class demons were sent to Desentia to live out their existence.

Affects
The virus affects all demons, some however in different ways to others. Some demons are carriers of a very special demon antibody, this antibody enables the demon in question to merge with virus on a level causing them an increase in physical prowess and overall power. This increase in power will also increase over the lifespan of the infected demons, as their normal powers will increase, eventually however after prolonged infection, the virus will begin to kill the infected demon, in a very slow and agonising death. This antibody is a random occurrence capable of appearing in almost any demon.

Those demons without the antibody are affected in a far more damaging way, after exposure, varying from three to ten minutes the virus will begin to affect the demon, beginning with enhanced strength and rage, the demon will then have only a few minutes to live before their bodies burn out, from the excess amounts of heat produced by the rage and power increase. Causing spontaneous combustion, from the inside out.

The only demon known to have survived exposure to the virus is Baroth, how he accomplished this is still a mystery.