The lightning strikes and the rumbling thunder was making the ghosts who were observing the fight frightened.
There was never thunder or lightning in the Ghost Realm, but the sheer aura of this martial technique that Xue Wei used, combined with the Lightning Elemental Qi, made them all feel their souls trembling in fright.
The ghost that Xue Wei was up against also sensed the danger. While he was unable to escape the first lightning bolt, he still managed to retreat from the second, and the third only caused him slight injuries when compared to the first that hit him accurately.
Although Xue Wei had managed to catch the ghost unprepared, and in turn, caused him some severe damage, the ghost was not at a point where his soul would shatter.
He was injured, and his body began to release something that looked like steam, but any ghost who saw this scene would be shocked. What was slowly rising from this ghost's body was not steam, but his spirit power.