The old man was Xu Ke's sixth senior brother, the sixth disciple of the Taiyi Cave Master.
The metal-elemental dragons valued the relationship of masters and disciples, but the cultivators must leave their masters and found their own caves after reaching Qian-level or Kun-level since the masters wouldn't keep disciples forever.
Under the cover of Jiang Yuan's art exhibition, Wang Shitong had come to East Ocean City to catch a small demon king.
The small demon kings were demon beasts that had passed the first heaven tribulation. Despite their weaker strengths, they were demon beasts above level 10 and thus were very valuable.
He wouldn't dare to try to catch it if this small demon king was inside or near the Demon Sea. However, the small demon king was in the city without a big demon king around, and Wang Shitong thought it was worth a try since he was at peak Qian-level.