Shen Yuan had already comprehended a large part of the Pot's Heaven Divine Power, that he received as a gift from Gong Buyu when he took her as his disciple.
Although the previous Sect Master managed to elevate his Pot's Heaven Divine Power practice to the extreme, becoming an Earth Immortal in control of a grotto heaven, the enlightenment book on Pot's Heaven Divine Power, which led Gong Buyu to the door, did not entail many profound notions of this divine power.
Despite that, Shen Yuan had made substantial progress in the Pot's Heaven Divine Power, even potentially reaching the peak of the Divine Skills Third Realm.
At that point, Shen Yuan would be fully qualified to take control of a blessed land, utilizing the strength far surpassing his own from this land to become a false Earth Immortal.
If he steps into the fourth realm, with the added boost of his cultivation base, opening up a blessed land would not be a difficult task.