Zhou Tian, no matter how high his cultivation level was, could not change the fact that he was currently surrounded by enemies. It was already quite difficult for him to ensure that his opponents would not finish him off too quickly given the situation at the time, let alone having the energy to do anything else then?
Therefore, although the ancient powerful being in front of Zhou Tian using the Time Rule was somewhat like showing off one's skill with the large saber before Guan Gong, even if Zhou Tian had the ability to eliminate the opponent's ability, he had to consider what other ancient powerful beings would do in that time frame. After hesitating for a moment, Zhou Tian had no choice but to abandon that thought at the time.