In the Cultivation World, most well-made defense arrays were engraved onto jade tablets, which were activated or simply smashed when needed.
Yet the formation before them was somewhat different: it was merely a transparent piece of jade about the size of an infant's fist. It bore no visible traces of array engravings, yet the spiritual energy inside could be felt with absolute clarity!
No wonder people always said array masters were rare in the Upper Realm; it seemed they were different from those in the Lower Realm!
Chapter 211