Yang Supreme Sect
When it was time for the second test of Yang Lujia within the territory under the Azure Dragon's rule, Yang Lujia felt cold, because he thought he was really going to die. It was because he was paired with a beast that was more powerful than he currently was. That beast was like a boulder in his heart that he could never lift off.
Moreover, that fight they had was a life-and-death battle. Yang Lujia was even made to believe that it was something real. In the end, it was just a trick to make him suffer and make him think that such a battle could happen in the near future.
That beast actually nearly killed him even after he transformed into his dragon form with chaos swirling around his body. As for the divine beasts that had first seen this transformation from Yang Lujia, they were as much as shocked when that beast appeared.