In a second-grade state boundary, Foundation Establishment is the peak. If one can establish a second-grade large formation, they can almost ascend to the pinnacle of the state boundary, securing an invincible position forever.
Even if numerous Demon Golden Cores, or even the Feather Transformation Old Demon come, under the restrictions of the Heavenly Dao, it would be impossible to break through this second-grade large formation.
Unless they are willing to perish and dissipate the Dao, facing Tribulation Thunder, and forcefully attacking with their "life."
Furthermore, Mo Hua had considered, if there were truly great changes in the heavens and the earth, chaos in the cultivation world, with warfare extending, blood flowing like rivers, and endless slaughter...
The second-grade large formation under the second-grade state boundary could instead become an extremely safe "pure land."
Using this as a base, there might be much that could be done.
