Pangong Tso muttered to himself irresolutely. Qin Mu's suggestion was indeed sincere, but also very scheming. If Pangong Tso went against the oath, it would be equivalent to making his soul worship shaman spell useless.
If he executed it, he would die immediately.
When that art turned useless, his abilities would no longer be that terrifying. His divine art would also become extinct and no one would be able to use it again.
Pangong Tso's threat level and existence would be enormously lowered.
In fact, the reason why Qin Mu could be a match for Pangong Tso and was able to beat him up miserably was because the soul worship shaman spell didn't work on him.
If he was faced with anyone else, even if they were a realm or two higher than him, they would still die under his art. There was no other end result!
Only Qin Mu whose name was fake could withstand Pangong Tso's strongest attack, forcing the other to fight him normally.