"Do you understand this place?"
Zhang San had been holding the Red Dragon Hammer in his hand the entire time mainly because, right upon entering, he saw the enormous magma pool. Zhang San guessed that in such a place, the Red Dragon Soul would be more familiar and would remind him of things to be cautious about.
On the other hand, the Red Dragon Soul was originally the protective Divine Beast of the Red Dragon Sect, and with the knowledge of a sect, it should have some understanding of such secret realms.
Indeed, the Red Dragon Soul took one look and knew what was going on here.
"If I'm not mistaken, this abandoned secret realm was probably used by a certain sect for their disciples' trials. Normally, there should have been more tests around the magma pool we just entered, but many are gone because it's been abandoned."
"Similarly, within the labyrinth, there are likely to be mechanisms, traps, lurking dangers, as well as some benefits and rewards."