The beast Duan Ling Tian and the villagers of the Duan Clan Village encountered was a demon beast. Ordinarily, beasts that were not Celestial Beasts and Divine Beasts were known as demon beasts. Most Celestial Beasts and the Divine Beasts in Realms of Gods were all intelligent and possessed human forms. Those without intelligence and did not possess human forms were considered demon beasts. Despite their lack of intelligence and human forms, they were rather strong.
Duan Ling Tian learned about this from the World Cleansing Divine Water. The World Cleansing Divine Water had also voiced her suspicion that it was the supreme powerhouses who had set the demon beasts loose in the Realms of Gods to maintain the ecological balance.