Qin Yun listened carefully.
After reaping a huge harvest from slaying three fiendcelestials, he became a lot more wary. He did not think it would be wise to probe the core areas of the perilous area he was in, but he could make more attempts in the periphery.
"This Grotto-heaven is actually rather safe," said Yu Yan with a smile. "We were really nervous as we tried to probe it. However, none of us could open the Grotto-heaven's entrance! Naturally, there were no injuries or deaths. Even the two second Firmament fiendcelestials made an attempt but they failed to open the Grotto-heaven's entrance as well."
"Oh?" Qin Yun was surprised.
"After exploring for so long, we only found these two spots to be special," said Yu Yan. "Of course, we have not gone into the core areas. If not for your help, the other prisoners and I would have probably perished while scouting."