Zhong Tian Yun understood what it meant because they didn't need trust in their cooperation. Tang Shaoyang wanted to use him as bait to lure the Heaven Founder. That was a good plan, and it was indeed more convincing with the death of the four family heads from the four great families.
However, the Murim Alliance must bear the risk. First, they would announce to the realm that Ximen, Jaegal, Situ, and the Murong Family lost their pillars. There was a chance the demonic faction would stir up trouble again, trying to take the four families down.
Second, the Heaven Founder might attack the four great families instead of coming for him. It would be bad if the Heaven Founder or the demonic faction took down the remaining four great families. It might even give a weird idea to the mid-sized sects. They might create an alliance to break free from the Murim Alliance while the Murim Alliance's influence weakened.
