He had defeated a Golden Core, and then returned...
Zhang Fei Xuan spoke cautiously, "Is it because the other Golden Cores are difficult to handle? Senior Brother, there's no need to rush. After all, the Demonic Path is powerful, and we have plenty of time..."
Before Zhang Fei Xuan could finish his sentence, Song Yin said:
"I was able to return because the Demonic Aura here couldn't sustain my journey to the Upper Realm for long. When I return I'll just find another pathway; I've locked on to them, no one can escape."
"Locked... locked on?" Zhang Fei Xuan was puzzled.
What did it mean to lock on to something after reaching the Upper Realm?