In the end, under Li Xinghe's suppression, that evil spirit let out one last scream and died on the spot.
After it died, a special aura appeared and was instantly absorbed by the region behind them.
Then, under their shocked gazes, a large amount of Primordial Source appeared within the area where the Primordial Source Beasts moved. Then, astonishingly, those Primordial Sources rapidly nurtured into Source Beasts one after another.
"This..." Dragon Emperor and Feng Jiutian were stunned.
Li Xinghe had not expected that the so-called Primordial Source was actually something born after the evil spirits here died.
These Outer-Domain Evil Spirits, in theory, could also become cultivation resources for them.
No wonder Primordial Source Beasts had been appearing in an endless stream all these years. So the root of it all was here.
Li Xinghe did not go chase after those Source Beasts.
The Source Beasts did not seem to step into this region on their own initiative, but the evil spirits inside would often charge outward.
It was just that their final outcome was certainly being killed by the Primordial Source Beasts.
And those Primordial Source Beasts could use this to continuously strengthen themselves.
In the end, this was the Primordial World, Primordial's territory. Those Outer-Domain Evil Spirits were merely losers and could only become nourishment for the Primordial Source Beasts.
As the years passed, this chaotic region would be devoured sooner or later. In the future, the Primordial Grotto-Heaven would contain only Source Beasts.
But was that truly the case?
If everything went smoothly, then there would definitely be no problem. But that evil spirit just now had said there might be an evil spirit king inside.
And the reason the Primordial Rules had opened the Primordial Grotto-Heaven was probably because the situation inside was not optimistic.