At that moment.
Everyone knew that someone was targeting the Returning to Truth Sect!
Yet, the perpetrator moved without a trace, specifically choosing scenarios where no masters from the True Qi Realm of the Returning to Truth Sect were present, to strike against the disciples of the Returning to Truth Sect in the Fetal Breathing Realm.
The number of people didn't matter.
As long as it was a suitable target, even if it was a disciple from the Returning to Truth Sect appearing alone, they would not hesitate to strike. Under these circumstances, it was very difficult for the Returning to Truth Sect to identify them.
Several times, the sect dispatched masters to seek them out, but ultimately returned empty-handed.