The Stellar Sword Dao Diagram was powerful, but it could not be used as a conventional method. This treasure consumed too much magic power.
If Perfected Lord Ming Huang's body was stronger today, or if he had a superior-grade fifth-tier spiritual armor to protect his body, Chen Daoxuan might not have been able to defeat him.
If he couldn't outlast the other party, Chen Daoxuan would be defeated and flee. With the Stellar Sword Dao Diagram, it was basically impossible for the other party to kill Chen Daoxuan.
Not to mention Perfected Lord Ming Huang, even a top Perfected Lord would find it extremely difficult to kill Chen Daoxuan if he wasn't good at spatial laws.
The Stellar Sword Dao Diagram suppressed him and he teleported to escape.