The gray war between two powerful devil and god.

A long time ago there was a war that rages throughout the world. A world between angles and demons. There was no life in the world just black and white. Two persons have hate each other for a long time, they declare war to each other, they killed each other and die. The war last for 30 years but nothing can stop between two powerful beings in the world. But one devil can end this war... he has a plan to use his secret ability on the god however something odd inside him...something that Devil's don't have.