C75 Master Is the Best 15

External Soul could enter and leave all parts of the palace, including Weiyang Palace, but these Weiyang Palace did not belong to External Soul.

Later on, after Si Yu died, the External Soul ordered someone to burn his Weiyang Palace, making it known to others that his Weiyang Palace had been accidentally set on fire.

In just half a day, Si Muxi was coaxed into speaking normally with Si Yu