Dark Old Demon

Roy's life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
...
It's really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!

Custom Made Demon King

As Sargeras's apprentice and lieutenant, Aggramar had made an agreement with Sargeras that they would each go in one direction to eliminate demons. But he never expected that in the short few years after they separated, Lord Sargeras, whom he worshiped the most, not only sentenced the Pantheon but also degenerated into a demon!

During the three years that the Burning Legion was preparing, the Pantheon had summoned Aggramar back and informed him about Sargeras's situation. They also got him to take over Sargeras's position as the Champion of the Pantheon.

A few years was like a nap for titans. The situation changed so quickly that when Aggramar heard this news, he was dumbfounded and still couldn't believe it.

Dark Seether