The great megacities of the Central Province always had human experts stationed within. However, just as the demonic race would send out Heavenly Demons, if cultivators of such a realm were to take action, it was a sign that a great war was about to erupt.
At such times, once experts of both races joined the battle, the casualties would only multiply. Therefore, unless the difference in strength between the two sides was overwhelming to the point of a massacre and slaughter of the entire city, high-rank cultivators would not act rashly to escalate the scale of war.
When enemies of the same realm clashed, this too was an unspoken rule in the wars between the races. If today in Cauldron Mountain City only Lesser Earth Fiends and Earth Fiends had come, then Foundation Establishment and Core Formation cultivators would have been the ones to fight.
In the borderlands of the human race, there were many such small-scale battles. But right now, what appeared before Zhao Chun’s eyes were not merely tens of thousands of Lesser Sky Fiends. A demon of Integration Stage strength had to be slain by an Integration Stage True Person!