Although the Outer Realm Demon Race cultivators had begun driving Ling Tian and the others away and harassing them, Chi Xue and the others still decided to have some people fuse with even more powerful Ancient Divine Beasts. That included God Devouring Bodies like themselves, as well as those Quasi-Saint Eighth Order experts. Chi Xue and the others worried that Ling Tian's group might get a chance to attack them, so they would need powerful cultivators to hold them off. Having those cultivators fuse with even more powerful Ancient Divine Beasts in advance was a way to guard against that. After all, if they waited until Ling Tian's group attacked before fusing with Ancient Divine Beasts, it would be too late.
At first, some people were unwilling, especially the cultivators Chi Xue and the others had designated to fuse with even more powerful Ancient Divine Beasts. But when they saw God Devouring Bodies such as Chi Xue and Po Tian take the lead and fuse with them, they stopped objecting and followed suit. It would take them time to fuse with the Ancient Divine Beasts, though; it would likely take thousands, or even tens of thousands, of years.
Of course, these people had agreed so quickly to fuse with even more powerful Ancient Divine Beasts because Chi Xue had promised to give them priority when distributing leaves from the Enlightenment Sacred Tree. After all, those leaves could greatly alleviate the stagnation in cultivation that came after fusing with an Ancient Divine Beast.
As mentioned before, capturing powerful Ancient Divine Beasts was quite easy for Chi Xue and the others, even those at the middle, upper, or peak of Quasi-Saint Eighth Order. With their cultivation and archery improving dramatically, it had become much easier for them to work together to heavily