The first, second, third, and fourth pages of the Myriad Races Atlas introduced the celestial, immortal, demon, and mortal races respectively. Moreover, the four races had something in common. They had all risen during the third Great Dao era, and had all disappeared from the nine zones at the end of the eighth Great Dao era.
The celestial and immortal races had completely disappeared.
The demon race had left behind mixed-blood descendants that were still active in the nine zones.
The monster race's overlord tribes had disappeared from the nine zones, but still had many other tribes that were still active in the nine regions.
From the information contained within the introductions, the four races were all very powerful, though from the introduction, it seemed that the immortal race had the advantage.
"Despite experiencing challenges, they remained exalted and mighty."