Mu Jinyu indeed killed Wu Dayong in a fit of rage, but did not scatter his soul; instead, he preserved it.
He wanted to see if Xie Chenkun's words were true or false, with how many lies mixed in, and whether Wu Dayong was their sacrificial pawn!
"Soul Search!"
Mu Jinyu looked at the struggling phantom silhouette in his palm, his expression icy and unmoved, softly uttered, and then performed the Soul Searching Secret Technique.
Instantly, Mu Jinyu's vast Divine Sense swept into the soul within his palm.
Wu Dayong's soul, when Mu Jinyu employed the Soul Searching Secret Technique on it, immediately contorted with greater anguish, his already phantasmal appearance seemingly on the brink of collapse.
The Soul Searching Secret Technique, as its name suggests, is used to probe the memories within a person's soul.