It was an indisputable fact that Ling Tian and Devouring Monster were stronger than Po Tian and Chi Xue. Ling Tian, in particular, was vastly more powerful than the two of them.
That made sense. Thanks to his cultivation method and the advantage of his Small World's scale, Ling Tian was far stronger than Chi Xue and Po Tian even at the same cultivation level. And now his cultivation realm was an entire major stage above theirs. It was no exaggeration to say that he could kill them with ease, leaving them no chance to escape.
Ling Tian was so much stronger than Chi Xue and Po Tian that if he triggered his final tribulation early, his chances of finding Primordial Chaos Qi first would increase greatly. He would almost certainly find it ahead of them. And if that happened, Chi Xue, Po Tian, and the others would have only one fate: death.
Thinking of this, Shi Ling and Devouring Monster grew worried. In particular, they realized that Ling Tian and Devouring Monster had no need to worry about being unable to break free from the Lord of the Universe's constraints.
Chi Xue and Po Tian, however, weren't worried about that at all. They were certain Ling Tian couldn't trigger his final tribulation before them. He would either undergo tribulation alongside them or a little later. Po Tian also offered Shi Ling and the others a reasonable explanation: Ling Tian was worried Chi Xue and Po Tian would attack his friends and family.
That made sense. If Ling Tian and Devouring Monster really broke free from the Lord of the Universe's constraints early, Chi Xue and Po Tian would surely attack Ling Chou and Hua Min'er. With their strength, they would have little trouble killing Ling Chou and the others.