The origin power of heaven and earth in the Great Pantheon Plane was stable and complete, and without entering the Dao Realm, it was impossible to achieve Sword Flight with the strength of one's own condensed Dao Fruit.
Han Muye's physical cultivation reached the peak of the Initial Knowing Realm because he had not yet condensed a Dao Fruit that belonged to the Great Pantheon Plane.
In reality, after numerous refinements through trials, his strength had already breached the barrier of life and death and was close to breaking the cycle of karma and nearing the Dominion Realm.
However, constrained by the Origin shackles of the Great Pantheon Plane, he had already condensed most of his power into a True Spirit Sword, and his body needed to refine from scratch to re-gather its strength.
Once his own strength was combined with the True Spirit Sword in his hands, achieving unity of man and sword, he would be able to directly enter Dominion.