Not long ago, when Dugu Ao entered the central region of the Tomb of Eternal Swords, he was also shrouded by a mysterious power and couldn't move at all.
Moreover, that mysterious power would automatically seep into his body.
Only those whose Sword Dao Proficiency was strong enough could repel this power.
Otherwise, they would be forcibly sent out of the Tomb of Eternal Swords by this power.
And in the process of resisting this power, it might even cause the power within their bodies to become chaotic, making it hard to recover for a time.
When going through the Second Layer test, Dugu Ao's power became chaotic exactly because he fought too desperately.
Unfortunately, in the end he still failed to pass the test.
"For all I know, he might not even be able to pass the First Layer test, unless he has mastered more than two kinds of Sword Dao Laws." Dugu Ao muttered in his heart.
