That was the legendary Realm of Kunxu,
a world full of Earth Immortals; there was a chance that even Celestial Immortals were hidden inside.
Only Qian Yexue knew how terrifying the Realm of Kunxu was and how many Overlords there were.
(Chapter 726)
The Heavenly Thunder Sect was a major force in the Realm of Kunxu.
Over the last few thousand years, the Gate of Heaven had been opened many times to allow Kunxu Cultivators to travel to Earth. Nearly all of them considered themselves much more superior and enlightened when compared to the mortals on Earth.
(Chapter 727)