According to the information provided, the weapons in different Wuxia novels are all very powerful. However, if I had to choose the most powerful weapon, I would recommend the Seven-Orifice Myriad Manifestation Umbrella in the hands of Great Escort Leader Ye from the Great Escort Agency System. It was said that this umbrella could conjure 19 different kinds of extremely powerful weapons in an instant. It was very powerful! I hope you like my recommendation.