Everything Shang Xia did was clearly noticed by Gao Yun. However, Gao Yun was too distracted by Youshang to do a thing. The only thing he could do was to redirect the way the energy fell into the spirit cave underground, but Shang Xia sucked up all the world origin with his Spirit Extermination Gourd before Gao Yun could try anything. 

Gao Yun understood that getting tangled up like that wasn’t the way to go. There were 18 wells that formed an opening to the spirit cave in the City Lord Manor. If Shang Xia continued to destroy them, they would no longer be able to steal the Tongyou Institution’s world essence.

That was also why Gao Yun was dragging out the battle as long as he could.

When the amount of energy decreased by half earlier, he didn’t break out into full-blown panic. In his eyes, even if Kou Chongxue was alive, he wouldn’t be able to change the tide of the battle. An accident might have happened, but the energy was still being sent back to the Ji Continent. That clearly meant that things hadn’t gone to shit yet.

Moreover, he felt that Ancestor Yun Lu would definitely be able to discover what was going on in the Changfeng City.

Gao Yun was dragging things...