As for the methods of prevention and defense, there are more methods, perhaps that's why it can only be applied to sneak attacks. ,Furthermore, it seems to be something obtained, most of it is self-practice or merit, but Liu Nai doesn't remember any lamp-shaped magic weapon, and even Tu Xingsun doesn't have it in his memory. If there is, Liu Nai remembers one, it is the enameled cup in front of Buddha Tathagata mentioned in Journey to the West.