Soul Fire.

The person he suspects of ratting him out is the child of the plane. He knows the child of the plane has been created and that whoever it is will hate him. It doesn't take him much to suspect that the child of the plane is working with the Celestial Supreme to suppress him. After all, she is the strongest being in the plane. 

He thought to himself with confidence, "It seems this plane will not be easy to subdue. But it is good too. I like a challenge. Let it not be said that I bullied them."

Then he chuckled evilly as he said, "Enjoy your peace for now. You won't have it for much longer."

He can use this communication system set up by the Celestial of Knowledge to attack the Celestial of Knowledge or the other gods connected to the system. It is a spiritual network formed with divine power which means it is an avenue of attack for him. But he didn't attack.