Shi Feiyang's array, designed to confront Ruan Zheng, Shen Tuhong, and Zhuge Jingwo, three disciples from the Emei Sect, could not be deemed entirely useless, yet it nearly was.
In battles of spell and array, one traditionally employs Qimen Dunjia, a military divination technique incorporating Jia Wood and Geng Metal and the interplay of the Seven Killings.
Liu Ren, on the other hand, is used for mundane daily predictions, such as needle and garlic trivia, not meant for trapping and killing. If Ruan Zheng were inside, he might have directly broken out with the help of Tianxuan Divine Sand, specialized in breaking demon enchantments.
However, everything in the world hinges on the phrase "being opportunistic". A thousand years ago, Elder Kuzhu had reached the end of his cultivation path with nowhere to advance, grappling between the teachings of Buddhism and Daoism.