Jiang Tang observed this dragon vein location. Throughout history, ancient emperors had numerous sinister methods, including burial artifacts and some gold and silver treasures, good items used by emperors, and companion burial items!
There was an even more cruel method, where in every tomb, besides the actual resting owner, there were other rooms within the tombstone containing numerous coffins of various sizes!
Those coffins were, of course, not as luxurious as the one for the actual resting owner, and the burial items inside were not as many nor as good!
Jiang Tang truly witnessed that even in the Mortal Realm, there were methods to mercilessly bury the living within the grave markers of the dead.
Why could she know that in this place with a dragon cave, there were innocent souls hovering within the tombstones, with resentment and reluctance to become vengeful spirits?