Taobao from Another World

The ruthless killer Cheng Jingling traveled through the Lingwu Continent and got a Taobao Ring of All Realms, which can buy various secrets, weapons, treasures, and elixirs in all the worlds... "The "Sword Controlling Technique of Shushan" from the Xianxia plane? It looks pretty good. Anyway, the martial arts secret book is cheap, so I bought it!" "The [Zhuxian Sword] from the prehistoric plane? It's a bit expensive, but I happened to need a set of formations to guard the house, so I bought it!" "The Golden Muscle and Jade Bone Pill comes from the magical spirit world. Can you cultivate into a pure divine body after eating it? Give me ten bottles to try first!" "You can even buy people? Fairies, goddesses, Nine Heavens Mysteries? Great! Let's buy these two big guys home first and try to see if they work..." … Cheng Jingling: I am a killer, I am very cold!