Upon hearing the voice, Kunpeng became defensive and started the Demon Palace that was hanging over his head. And Demon characters carved on it descended down like curtains. Kunpeng was safeguarded as if in iron walls.
No wonder Kunpeng was so cautious. Even though both Kunpeng and Hongyun were Sages-to-be at Secondary Stage who had achieved one separation, they didn't find someone hidden nearby watching them fighting. The hider must have had a higher cultivation or some Magic Weapon which could hide his vital force so that he could manage to hide around but not be found.
Cold sweat appeared on Kunpeng's forehead. If that man didn't show up, he probably would still not be aware of his existence. He would probably have died, or at least be badly wounded if the man had made a sudden attack.