Wu Hong nodded. "Their origin makes them unique." Many cultivators are dedicated to studying history and culture throughout the Chaos Universe, and they discovered something: most cultures developed the same way. It's like there is a blueprint to ensure people's naming sense, language, philosophy, values, and many other factors developed the same culturally.
There are a few outliers, but most are mutations of the outline. However, this fact has two true outliers: Buddhism and the Barbarian Race. Although these two have assimilated with the "blueprint culture," it did not change the fact that the origin and essence of these two factions are entirely different.
"If I guess correctly, their origin should have something to do with the Prehistoric World," Wu Hong continued. "Heavenly Dao might give them a spot, just for the potential that the Barbarian Race might become the key to finally gaining access to that world."