First, it could disguise one's own aura.
No matter what cultivation technique you practiced or what kind of power your body contained, Myriad Disguise could perfectly conceal it or disguise it as another aura.
For example, Qin Yan had Demon Qi within him.
If he did not want others to discover it, he could use Myriad Disguise to hide the Demon Qi, leaving others unable to sense anything at all.
Or, he could disguise the Demon Qi as ordinary True Qi, making others believe that he merely cultivated an ordinary technique.
Second, it could alter one's appearance.
Height, build, facial features, hair color... all external traits could be changed at will.
You could become someone else, or become a completely different person.
Unless someone was two major realms above the user, they would be unable to see through the disguise.
Two major realms!
In other words, with Qin Yan currently at Sixth Grade, a Seventh-Rank Grandmaster could not see through his disguise, nor could an Eighth-Rank Grandmaster.
Only Ninth-Rank Venerables and stronger experts might be able to expose it.
The third secret art—Void Guard.
This was a defensive skill, and an extremely special one at that.
It had two forms: passive and active.
In its passive form, Void Guard activated automatically—however strong one's Mental Strength was, it could ignore attacks of equal strength.
This was an absolute defense. It consumed no energy, had no cooldown, and remained active at all times.
In its active form, Void Guard could unleash even greater power—enough to defend against attacks from someone one major realm above oneself!
Of course, such a heaven-defying skill could not come without a cost.
Actively using Void Guard came with a rather lengthy cooldown.
It could not be used lightly unless absolutely necessary.
Even so, the value of this