Unless this person's cultivation exceeded He Song's by an entire major realm.
Otherwise, even if this person truly broke through to the Spirit Transformation Realm, they would still be able to live only under He Song's control.
And this was also the Ten-Thousand Tribulation Soul-Enslaving Contract's most powerful effect.
Ordinary secret arts used to control others were basically incapable of controlling cultivators of the same rank.
Just as Spirit Transformation controlled Nascent Soul, and Nascent Soul controlled Golden Core.
Only when the two sides' cultivation levels differed by an entire major realm could such secret arts used to control others function normally.
But once the controlled party's cultivation broke through, successfully raising their cultivation by a major realm.
The person who had originally been able to control them perfectly.
Would immediately lose control over that person after their cultivation successfully broke through by a major realm.
This was the limitation of other secret arts.
Those secret arts could only allow cultivators to forcibly control others through their own strength.
And such forcible control naturally required the cultivator's own strength to surpass that of the person being controlled.
Once both parties were in the same realm.
Then, with no disparity in cultivation, the secret art naturally could no longer take effect.
But the Ten-Thousand Tribulation Soul-Enslaving Contract He Song cultivated this time was different.
Once this art was cast.
Not only could it forcibly control beings whose cultivation was a full major realm below He Song's.
After it was cast, the contract formed within the enslaved person's soul.
Could also, little by little, make that person truly develop the mindset of being He Song's servant.
This was enslavement on the level of the soul.
Not merely making the other party submit through one's own overwhelming power.
Therefore, even if that person's