After all, once Ghost Soul's identity showed signs of being discovered by the demonic cultivators, Ghost Soul would likely find it difficult to withdraw from the demonic path's sphere of influence.
When that time came, He Song would lose a powerful Nascent Soul Puppet.
However, He Song had only just learned of this method from Han Yuezi.
He did not know whether this method would truly cause no harm to the Nascent Soul Puppets he had refined.
Therefore, to ensure that Ghost Soul would not completely lose his identity as a demonic cultivator after being altered by He Song,
He Song chose to proceed cautiously.
He would first let Clear Wind and Idle Cloud try it.
Only after confirming that this method posed no harm to these puppets
would he alter Ghost Soul, as well as Mingyue when she returned later.
This was naturally more prudent than altering Ghost Soul from the outset.
After all, the first one He Song altered had actually been Idle Cloud.
Even with Clear Wind, He Song had waited until Idle Cloud's alteration was completely finished before making his move.
And even if something went wrong with Idle Cloud, He Song could use his own puppet-refining skills to modify him.
He would not suffer too great a loss.
However, He Song had now successfully completed the alterations to Clear Wind and Idle Cloud.
He had ensured that even cultivators with profound expertise in the Spiritual Artifact Puppet Refinement Technique would be wholly unable to detect their identities.
With that, He Song naturally had greater confidence in altering Ghost Soul and Mingyue.
The alterations to Mingyue and Ghost Soul, like the previous alterations to Clear Wind and Idle Cloud, did not take He Song very long.
Very quickly,
He Song had completely finished altering all four