The problem was that the Lord of Order had already gone mad. If the Lord of Chaos completely fused with him, he would most likely go mad as well. Even if he did not at first, he would probably go mad eventually, because Andrew's Curse was still inside the Lord of Order.
In other words, Andrew could continue exerting influence. With his experience dealing with the Lord of Order, he would be even more adept at it. The Lord of Chaos was practically courting death, which was why God Andrew had thanked him earlier.
The Lord of Chaos chose to completely fuse with the Lord of Order not only to avoid leaving the stage, but also to save him. He could not simply watch the Lord of Order become a madman.
The Lord of Chaos and the Lord of Order had an extremely close relationship. Either of them could sacrifice himself for the other.
Moreover, the Lord of Chaos believed he could suppress the Lord of Order and gradually set him straight again.
Outside the Black Robe Ability Universe, the Fusion Body of the Lord of Chaos and the Lord of Order fully took shape. The Lord of Chaos was on its left, while the Lord of Order was on its right, making for a very bizarre sight.
The Fusion Body stared coldly at God Andrew and said, "I am The Intermediary. Mechanical Demon King, we will have plenty more chances to play."
The Lord of Order and the Lord of Chaos had fused completely, rather than merely being stacked together. In other words, they had become an entirely new lifeform: The Intermediary. He possessed only one consciousness, a new consciousness born from the fusion.
In fact, "The Intermediary" had been the Lord of Order and the Lord of Chaos's