Mu Qing banned every clan member from going out of the clan less the Cao clan use underhand tactics. Now, the entire mu clan was under protection of the grand formation. Even they mobilized their entire clan's power, they won't able to break its defense easily without paying a hefty price.
At this time, Feng Yun was also feeling a little pressure. He was now cultivating in a big room. He surrounded by the small mountains of spirit stones, a high grade spirit gathering formation placed on the floor. This formation was sucking the spirit stone's qi and turning in into a pure spirit energy for Feng Yun to absorb.
The spirit energy in the room was so dense that it looked like white fog.
Feng Yun was sitting in the center of the formation and absorbing the spirit energy with a quick pace.
Feng Yun was not only one who desperately trying to raise his strength, other members of the Mu Clan were also trying their best to raise their strength.