Because he was unfamiliar with the second layer region.
As soon as he entered the second layer region, Lu Changsheng activated his Perception Domain.
"Buzz."
The Perception Domain unfolded and transitioned from void to reality.
A layer of white light enveloped Lu Changsheng.
However, he quickly minimized the coverage of the Perception Domain.
He narrowed it directly to the surface of his body.
This way, his Perception Domain wouldn't stand out much.
Also, within the Perception Domain, external demonic beasts, spirit beasts, and martial artists couldn't sense him.
As for whether Immortal Masters could detect it using their divine sense, Lu Changsheng wasn't sure.
Perhaps they could, given how unique divine sense is.
Even if they could detect the Perception Domain, they wouldn't be able to tell what was happening inside it.
They could only sense the existence of the domain.
