Sword Marks.
After Pei Ye grasped the Liuli, the sword marks from their exchanges already covered the entire Sword Storing Pavilion.
The old man looked at him with a cold gaze and uttered four syllables, "[Three Lights Encaged]."
...Formation Dao.
Pei Ye didn't know how significant the words "Nurturing Mountain Formation" were, nor could he imagine what kind of extraordinary talent in Formation Dao it took to set up a formation amidst such an intense swordfight... But in that instant, the entire Sword Storing Pavilion suddenly plunged into complete darkness.
It was a familiar situation; Pei Ye immediately understood the old man's intention.
—Pei Ye, Liuli, Ming Qi Tian, within the trinity, the only sensing ability was Pei Ye's five senses. The girl's nearly divine assistance with the sword had always been predicated on the boy's sword movements.