"These Beast Cores appear to be from low-grade Spirit Beasts. For many Ying Tian Realm cultivators, they are already extremely valuable treasures."
Lin Feng's gaze continually swept across the fist-sized, exceptionally smooth crystals, his interest clearly piqued.
After all, he had rarely seen such high-grade Beast Cores.
Before Origin Beasts on the Hundred Source Continent assumed human form, they were divided into low-grade Origin Beasts, mid-grade Origin Beasts, high-grade Origin Beasts, and peak Origin Beasts.
Their strength respectively corresponded to the human realms of Na Yuan, Tong Mai, Ju Dan, and the Lower Three Tribulations.
Once peak-grade Origin Beasts completed their cultivation, they would undergo a lightning tribulation.
If they passed it safely, they could assume human form!
At the same time, they would no longer resemble their former beastly selves. Their intelligence and capacity for learning would both greatly improve.
Therefore, Origin Beasts that had survived the lightning tribulation were called Spirit Beasts by the people of the Hundred Source Continent!
Furthermore, after an Origin Beast became a Spirit Beast, its rank was no longer measured by grade, but by tier.
They too were divided into four ranks: low-grade Spirit Beasts, mid-grade Spirit Beasts, high-grade Spirit Beasts, and peak Spirit Beasts.
These ranks respectively corresponded to the Ying Tian Realm, He Tian Realm, and Upper Three Tribulations realms of human cultivators.
After all, the gap between realms within the Upper Three Tribulations was enormous, which was why it covered both high-grade Spirit Beasts and peak Spirit Beasts.
As for what came after that, Spirit Beasts would face another lightning tribulation.
Once they safely passed it, they would become Source Beasts.
At that point, they would gain the recognition of heaven and earth and would likewise be able to comprehend the power of Sources.
If they could completely comprehend a