This is an entry-level assessment.
Those entering this place must learn this mental method and then use this cultivation technique to strike a round area on the metal wall. Doing so will open a passage, allowing entry to the next room.
If they fail to learn it, their progress ends here, and after a period, this place will expel them all.
Using an advanced technique as an entry-level assessment shows just how formidable the master of this place is.
Perhaps he is also a great power similar to Alvin Bernard?
Carson turned his head and said, "You've all seen the rules. This thing can't be helped by others, everyone must try their best on their own."
The metal plate had a clear warning: only those who learn the cultivation technique may pass onto the next stage, and any cheater would be immediately eradicated. Clearly, methods like the Windroll Banner had already been anticipated by others.