One vs Two

After Su Mo left Earth Pagoda, he returned to the residence of Wu Chen. Sitting cross-legged in a cultivation room, he continued cultivating.

With regards to Wu Lie and Wu Yu'er, he did not have to worry too much. He was able to kill with a few strokes.

However, when killing the two, he must be careful not to reveal his true identity.

First, he could not use his Natal Spiritual Sword and Grand Firmament Swordplay.

The reason being that, once these tactics were used, they would be instantly recognized by Wu Tian Yu, Wu Chang Yuan, and those who had visited the Firmament World before.

He either had to not use any martial arts skill at all, or use some ordinary skills which he had learned in his early years of training.

Even so, there was no major difficulty in murdering Wu Lie and Wu Yu'er.