Against the Horde (Part 3)

'Who...who was it that found and exposed my secret?' At a loss, Bai Renyi blanked out, staring absentmindedly into the distance with no care for the horde making its way to his sect's doors.

To preserve this secret, Bai Renyi went to extreme lengths, framing, killing and erasing all the traces that could lead to him. Qiu Meng aside, Bai Renyi didn't believe that his secret had leaked to anyone. So how did these disciples find out the truth?

More importantly, why did his sneak attack fail to destroy their leader's soul?