Luo Zheng naturally knows what the essence of yin and Yang is, but he has never seen it himself.


    There is a record of the essence of yin and Yang in the refining instrument volume of Tongtian record. This is the necessary material for refining immortal level instruments. Any magic weapon made of high-grade materials must be injected with the essence of yin and Yang before it can become immortal instruments.


    The essence of yin and yang can make weapons communicate Yin and Yang and integrate into heaven and earth. Only such weapons can produce wisdom and play the most terrible power.


    However, how can we get the essence of yin and Yang? It is even more rare than something like divine spring and holy water. Even in the refining roll, there is no record of where it will be born and find it there.


    Unless, it is to get the immortal ware and absorb the essence of yin and Yang in the immortal ware to Xuan!


    Such a thing is crazy. Don''t know what kind of existence a person who can control an immortal product will be. Even if it is an immortal tool, Luo Zhengfa can''t deal with it.


    However, the essence of yin and Yang is actually something Luo Zheng is determined to obtain. In the future, Tongtian 81 sword needs to be promoted to the level of immortal tools, and it also needs to absorb a lot of the essence of yin and Yang.


    "Tongtian sword array already needs so many yin-yang essence, and listening to Xuan''s tone, he needs more yin-yang essence..."


    When Luo Zheng thought of this, he suddenly felt that the pressure increased greatly, and there was a heavy task and a long way to go.


    "Xuan, since you need a lot of yin and Yang essence, you must know there are such things there?"


    Luo Zheng felt that since he also needed the essence of yin and Yang, he could just prepare the parts needed by Tongtian sword array.


    "Naturally, I know there are many places with Yin-Yang essence. However, they are not in the Yuan Wu world. Even in such a low-level world, the number of Yin-Yang essence must be very rare, which is far from enough. You have to find a way to get some immortal tools for me to absorb."


    The way of Xuan disdain.


    "Some immortals? Are they Chinese cabbage in the field? How many do you want?"


    Luo Zheng couldn''t laugh or cry. He didn''t want to continue this topic. He felt that it was useless to talk to him.


    "By the way, this Xuan is an old monster who has lived for thousands of years. Maybe he can know where to find Xuan ghost fruit!"


    Suddenly, Luo Zheng had an idea and was ecstatic.


    After leaving the hundred battles Dynasty, Luo Zheng went all the way. Every time he entered the city, he would inquire about the mysterious ghost fruit. After arriving at Feiyun City, he also inquired from Yuyun business alliance and Shi Zizhen, but they seemed to have never heard of this kind of ghost fruit.


    Thinking of this, Luo Zheng immediately asked.


    "Mysterious ghost fruit? This seems to be a unique spiritual fruit in the Xianwu world. Few people know it. The Xianwu world is a big world and the upper world of the Yuan Wu world. It''s a higher level. How can you know? And what are you doing?"


    Xuan heard a rather surprised voice.


    At this time, Luo Zheng was also shocked. He had heard Xuan say that there are multiple worlds between heaven and earth. These worlds are independent and have unbreakable barriers. Only powerful warriors can break through the barriers of the world. Moreover, the higher the level of the world, the thicker the barrier, and it is difficult to break through. How could father Luo Li know the mysterious ghost fruit of Xianwu world.


    Besides, Xuan is also in the Xianwu world. Few people know the existence of Xuan ghost fruit. How could my father know?


    Luo Zheng suddenly felt that his father was more mysterious.


    "My father was originally from an unknown source. He was saved by my mother inadvertently and was seriously injured at that time. Is it true that my father was not born in Yuanwu world, but from Xianwu world!"


    Luo Zheng felt a great shock. He suddenly found that the origin of his father Luo Zheng had exceeded his imagination.


    "What are you thinking, boy?"


    Seeing Luo Zheng''s sudden sinking, Xuan couldn''t help being more curious.


    "Nothing..."


    Luo Zheng shook his head. There are some things that can''t be revealed to Xuan until he has found out. Who knows what the consequences will be?


    "Well, you can improve your accomplishments as soon as possible. If you have any questions, you can ask me. Although my strength has decreased, less than one ten thousandth of that before, with my countless experience, I can still give you a lot of advice."


    Although Luo Zheng didn''t say what was on his mind, Xuan didn''t care. No one had his own secret, and he didn''t tell Luo Zheng his origin.


    Now, there is no distinction between the two. As long as Luo Zheng''s strength is improved, Xuan has the hope of restoring his strength.


    So Xuan now wants to help Luo Zheng with all his strength, and won''t have any reservations.


    "What I need to improve now is swordsmanship. I want to cultivate Xinyuan sword code to a small level. After all, my sword array is not used casually to avoid being coveted by the strong. It can only be used as a killer mace!"


    Luo Zheng nodded.


    "OK, let me help you. Martial arts, martial arts and even magical powers in the world operate according to the laws of heaven and earth. The more they fit the laws of heaven and earth, the greater their power will be..."


    Xuan explained, no shallow into deep, from simplification to complexity.