Let's rewind time a bit.
When the old man was urging Gu Qing Shan to choose between facing his Tribulation and Zhi Luo.
Gu Qing Shan chose to face his Tribulation without hesitation.
Under the protection of his sword array, he successfully passed the Fire Tribulation and left the Mahesvara realm.
While the old man led the other cultivators to destroy Zhi Luo's mountain.
Gu Qing Shan continued to enter his Water Tribulation.
Among the Four Pillar Elements of Earth, Water, Fire, and Wind, the latter two represented destruction and passing respectively, while the first two represented creation and growth.
That was why the Water Tribulation's main goal was not to take away a cultivator's life.
It represented change, an unknown Tribulation.
Gu Qing Shan passed through countless faintly dim lights.
At a certain point, these lights connected to one another to form a net that illuminated the entire world.
