Chen Fei this time shattered the Rule Crystal, not like in the Ruins, where he consumed the power of the Rule Crystal to its limits, which was really too wasteful, lasting only thirty to forty breaths of time.
It can only be said that it is a method to be adopted under special circumstances.
However, Chen Fei did not take as long as the initial twenty days or so to completely consume a Rule Crystal, which was too time-consuming.
If it took twenty days for a Rule Crystal, then Chen Fei's five Rule Crystals would need at least a hundred days. While this would maximize the utilization of the Rule Crystals, there would be too many variables.
The Evil Clans' intentions towards the human race were very clear to all races in the Black Stone Domain. At present, the strength of the human race had dropped to an unprecedented low in history.
There was no longer so much time for Chen Fei to slowly cultivate anymore.