Perhaps the only one who might know something here is Elder Sword.
Elder Sword recalled his past experiences at the Sword Intent Chongxiao Pavilion, where he had spent most of his time cultivating and had little exposure to the outside world.
Suddenly, a thought flickered in his mind; he remembered a book he had seen at the Sword Intent Chongxiao Pavilion, which mentioned that Great Mahayana Cultivators used Grotto Heavens as their dwelling places.
"Perhaps that place is a Grotto Heaven, only a Great Mahayana Cultivator can open one!" Elder Sword communicated through transmitted sound.
"Then it must indeed be a Grotto Heaven. We on the Beishu Continent know nothing about them, and that's why we were aware that there was something abnormal there, but we couldn't detect the existence of the Grotto Heaven!" Ancestor Lu transmitted back.
