He exuded an imposing aura. He was clad in long robes.
Back then, He opened up a realm in the lower world of Azure Mystic and recruited people from there. Those who joined had to treat him like their master. In truth, he only wanted to make use of them to control Azure Mystic. He's nothing but a trickster, trying to fool the world under a false title. After that, Qin Wentian spoiled his plan back in Azure Mystic by becoming himself the Overlord.
After the events at the Lifelong Realm, Qin Wentian established the Qingcheng Realm who's the Heavenly Talisman Realm neighbor. So they were not far away. They finally met at the Convention of the Myriad Realms where he tried to have conflicts with Qin Wentian by provoking him.
After the events of the convention, the Heaven Talisman Reamlord as well as his disciple came beg forgiveness from Qin Wentian for their previous attitute. It's Jun Mengchen who came out and chose to clean the grudge by simply telling him to scram because even if he loath him, without him he may not have ever met Qin Wentian, Bai Wuya or the senior brother who invited in the sect.