The desire to power just like lies is common and known trait of humans, beasts and other races. A lot of life forms and other unnatural things are born out from that and one simply can not throw these away.
Even Ruler himself.
Xue Ren knew that everyone has their own reasons and he himself was rising in strength. Though he had no knowledge about other universes, it's clear that there is some scheme going on. And the solution to everything else is the power itself.
Raising his divinities can bring him a lot of aspects that will surely help him defeat every problem on the way.
"Ahh!"
As Xue Ren assimilated his powers with Mother Nature of this world, his perception rose tremendously high. He felt really good just from knowing the exact number of the elves, trees, leaves and roots.
These were all his weapons right now.