Guo Lin knew that his big brother was not only a Grade Nine Alchemist but also the big brother of the Lake Master. The formations he arranged were incredibly impressive. Everyone in his circle wouldn't be ordinary people; they were either Grade Nine Alchemists, High-Level Formation Masters, or someone like their Lake Master with significant power.
Thus, when his big brother mentioned that this item was extremely rare in the entire Cultivation World, it implied that even among Grade Nine Alchemists, High-Level Formation Masters, or people like the Lake Master, it might not exist. For a regular disciple like himself from the Thirty-Six Caves, it was essentially nonexistent.
Even if it existed, it wasn't something someone like him could obtain, and even someone like the Lake Master might not be able to acquire it.
