"Ma ha ma ha!"
In Qin Mu's dream realm, small Qin Mus shook their heads and spoke in a language no one understood. They arranged Celestial Venerable Ling's letter, which allowed them to have their own comprehensions before they sat together arguing.
They fought on top of arguing, as they each used Celestial Venerable Ling's divine art that they had comprehended. A bunch of them yelled and beat each other up.
The various small Qin Mus had their own strengths, but none of them could perfectly replicate Celestial Venerable Ling's divine art. They could only replicate part of it at best.
Even so, Qin Mu's dream world was made into a mess as dream realms were shattered.
When one dream realm was broken, another one was formed, causing them to remain stuck in Qin Mu's dream realms.