Back in the Spirit Jade Palace before, Zi Jin had heard Granny Yue mention that Jun Wu's powers was not what disciples of the Spirit Jade Palace like her could take on and had given them strict orders to not go provoke Jun Wu. Even their Palace Lord himself had also been helpless against Jun Wu.
It could be seen from that that Jun Wu's powers were surely not weak. Hence, with that power, it shouldn't be unable to teach Zhuge Yin a lesson.
Jun Wu could have very well defeated Zhuge Yin up on the arena stage, to save Yue Yi, and teach Zhuge Yin a deserving lesson.
But Jun Wu had not done that. Just as Zi Jin had thought that with Jun Wu's appearance, he would be able to turn the tables completely around, the words that Jun Wu said had instead chilled Zi Jin's heart felt like it had fallen into a icy lake.
