No wonder this old man managed to train a disciple like Wei Ziqing. As a master himself, he was no saint; his methods were jaw-droppingly ruthless and venomously cruel.
Ye Qiu had been deliberating earlier whether to unleash the power of blackened transformation. With his current strength, defeating the opponent was exceptionally difficult. Even with spiritual power as his ace up his sleeve, it might not guarantee effectiveness. Moreover, if his spiritual power were revealed and failed to produce results, it would become harder to use that same method to harm the opponent again.
Only by resorting to the blackened power could he stand a chance against his adversary. The disparity between them was simply too vast to bridge otherwise.