Douluo: I Spent Twenty Yuan to Become the Strongest Sea God

Xu Miao came across a short video. If you were about to travel to Douluo Continent and only had twenty yuan in your hand, which of the following items would you plan to buy? [Martial Spirit Xuanyuan Sword: Ten Yuan] [Martial Soul Xuanyuan Water Control Flag: Ten Yuan] [Martial Soul Dinghai Shenzhen: Eight Yuan] [Martial Soul Seven Treasures Exquisite Tower: Six Elements] [Martial Soul Seraphim: Five Elements] [Martial Spirit Haotian Hammer: Four Elements] [Martial Soul Seven Killing Sword: Four Elements] [A top-quality fairy grass: four yuan] [All Haotian Sect's secrets: Three Elements] [Bibi Dong's admiration: Sanyuan] [Poseidon's favor: two yuan] [Yu Xiaogang's theoretical knowledge of martial arts: One Yuan] Xu Miao decisively chose Xuanyuan Water Controlling Flag, Dinghai Shenzhen and Poseidon's favor. Just after the selection, Xu Miao was forcibly sent to Douluo Continent, and it was also Poseidon Island, the inheritance place of Poseidon. ... Bo Saixi: "Tang Chen, don't come to me again. I'm afraid Xu Miao will misunderstand." Qian Renxue: "This guy has actually obtained the inheritance of the gods, we must win him over." Tang Hao: "The Clear Sky Hammer is the best weapon spirit in the world. How can there be a stronger weapon spirit." (PS: The protagonist is in the neutral camp, standing in the middle and fighting on both sides.)