Tang Yin smirked, all 4 sides of the chamber looked identical. However, from the Patriarch's memory, he knew how to access the real treasury. Tang Yin lightly tapped random parts of the wall with extreme care and precision. To access the treasury, one had to know the pattern to open the formation.
Although the chamber looked like a normal room, it was in fact an Array Formation. Array Formations were formations created by Formation Masters. Formation Masters was a very popular profession in the cultivation world, it was only third to Alchemists and Forgers.
Formation Masters could create an Array Formation using a wide range of materials. The Array Formation created by Formation Masters were a sort of formation that could be laid out to serve different purposes.
