In the following weeks leading up to the arrival of the lord from the Heavenly Dragon temple, Xuan Hao found a relatively deserted location in the middle of the empire that the outpost was located in before beginning to prepare a trap, while also asking both Yi Min and Pei Yang to come and help. Making sure that Pei Yang picked up Yi Min before coming, as it would take her at least a few weeks to reach his current location on her own.
Although Yi Min wouldn't be of much help when it came to fighting the lord of the Heavenly Dragon Temple, she was the strongest formation master that he knew about and only person who would be able to guide him and Pei Yang in setting up a killing formation strong enough to have any effect against someone in the Earth Immortal Realm.