At this moment, the Hongmeng Vast Expanse Body mentioned by Shen Shao was at the edge of the Great Thunder Marsh.
The Great Thunder Marsh was a sea of thunder, the largest forbidden realm within Yuezhou.
The reason it was called a forbidden realm was that the entire area with millions of miles of thunder sea was covered by heaven-sent thunder.
The edge of the Great Thunder Marsh was fairly safe, but venturing millions of miles deep into it was something even land immortals couldn't withstand.
The Rakshasa army that had traveled across the sea and arrived from the southern region of Yuezhou, after leaving countless corpses, had no choice but to retreat.
Legend had it that the predecessor of the Great Thunder Marsh was the site of an ancient sect, which somehow enraged the will of the heavens and earth, thereby bringing down the heavenly punishment of the thunder sea and forcibly transforming the entire sect into the Great Thunder Marsh.