Soon enough, this lingering worry was dispelled by Instructor Duan.
According to Instructor Duan, when Taixi City was first built, Mystic Cultivator rune-masters had carved ancestral mysterious runes upon the foundation stones beneath the perimeter walls, all to ensure that evil entities would be halted outside the walls and demonic forces barred from entering the city.
This was a mystic method commonly employed before most cities were established, and it was truly wondrous and extraordinary.
Chapter 35