Liu Ziru naturally had more information as the Five Star Executor of the Dark Domain.
The Portrait Of Emptiness was one of the Ancestral Artifacts from ancient times.
It played a huge role in resisting the Nefarious Demon Region.
The reason was that one of the functions of the Portrait Of Emptiness was to have powerful spatial power and the ability to affect time.
A day in the Portrait Of Emptiness that could suck a living person in was equivalent to a year in the outside world!
Back then, in ancient times, the Human Ancestor not only used the Portrait Of Emptiness to nurture prodigies, he could even place injured cultivators into the Portrait Of Emptiness to treat their injuries.
This was one of the important reasons.
The second reason was that the Portrait Of Emptiness could exert an array. As long as one sucked the enemy in, they could activate the array to attack them.