Tang Yin's Natural Law Domain, his Natural Law being that of Control, allows him to have perfect control over his Personal Domain, one of the most powerful domains that ever existed, even in the Upper World.
This is why Tang Yin's image changed drastically this time and perfectly matched his soul's form.
Yet, this in itself was not a Phase, as many thought in the area. It is simply a personal domain, created to be the imitation of the Phase that Tang Yin created. A replica was designed to increase the power of the main one.
His entire body was glowing after activating his domains, and the Natural Law Domain spread from side to side across the battlefield.
Nothing could stop it, putting all of this under Tang Yin's control.
