Upon learning that Ling Tian was going to try attacking the firmament, countless cultivators were fired up. After all, they knew that if Ling Tian could break through the firmament and open a path to the Outer Realm, they would be able to free themselves from the Lord of the Universe's restraints. It was what they had dreamed of for ages.
Of course, they didn't just stand by and watch. They unleashed their strongest attacks, hoping to affect the eighth and ninth layers of Tribulation Clouds as much as possible. That way, the clouds would have less of an impact on Ling Tian's next attack, giving him a better chance of breaking through the firmament.
It had to be said that everyone's attacks were quite effective. They came within a hair's breadth of dispersing the eighth layer of Tribulation Clouds, and by then, many cultivators' attacks could already affect the ninth layer. They had done all they could to weaken the ninth layer as much as possible.
Po Tian and Chi Xue's attacks were the most effective. Not only did they tear open the Tribulation Clouds above Ling Tian and the others even further and draw the lightning strikes, they also directly attacked the clouds and achieved some results. Under Po Tian's assault, an energy barrier appeared. According to Po Qiong and the others, if they could break through this energy barrier, they would have broken through the firmament—and opened a path to the Outer Realm.
However, the Enlightenment Sacred Tree frankly stated that the energy barrier's defenses were extraordinarily powerful, far surpassing even the Myriad Sword Demon Extermination Grand Formation fused with the Buddha Kingdom World Formation arranged by Ling Tian. Even Ling Tian would have a hard time breaking through it, let alone Chi Xue and the others.