In the battle with the Demon Realm army, Zhou Shu had once used the Hundred Steps Flying Sword.
At the time, Zhou Shu had just learned it, and the Abyss Rainbow Sword had not completed many kills. His mastery of the Hundred Steps Flying Sword wasn't high, so the outcome was naturally not satisfactory.
The strike only injured a first-rank demonic beast without killing him.
But Zhou Shu's Hundred Steps Flying Sword was no longer the same as before.
Just now, Lu Wenshuang had used the Abyss Rainbow Sword to kill hundreds of demonic beasts.
Moreover, Zhou Shu's spiritual essence cultivation was already at the first rank. Under the enhancements, his Hundred Steps Flying Sword didn't achieve anything. This surprised Zhou Shu.
Logically speaking, ordinary first-rank martial artists might not be able to withstand his sword strike. Even the Great Qin emperor back then might not have been able to withstand it so easily.