Without mentioning the efforts the Ancient Powerful Beings put into destroying magic crystal weapons, Zhou Tian seized the opportunity to launch numerous attacks against them. During those times, as the ancient beings tried to evade Zhou Tian and attack the magic crystal weapons, their depletion of power was also correspondingly tremendous.
Thus...
Without their own realization, their strength was continuously being worn down in the process. Although they could recover given enough time, if Zhou Tian did not allow them this recovery time, their strength would surely become weaker and weaker.
Following Zhou Tian's original plan, now was the very moment he could weaken the ancient beings' strength, which was indeed achieving his goal. As long as their strength was reduced to a certain extent, Zhou Tian believed they would no longer pose any threat to him.
