He had already killed two and didn't care about adding another.
If it were anywhere else, he might have had some reservations, but this was Ninefold Spring, where the space would not exist for long. Once he left, this space might disappear, and even a Hollow Void Expert from Nirvana Sect searching for traces would find nothing.
Xu Ruobing stood on the Flying Boat, watching Chu Ning almost instantaneously kill the three adversaries in silence.
Her man was excessively strong.
As for Chu Ning's killing of these three, Xu Ruobing had no particular feelings about it. The cultivation world had always been like this: during the struggle for treasures, if one had no self-awareness of their own strength or underestimated others, then being killed was just bad luck.
