Drilling into the cave, Yang Fan discovered that the tunnel was longer than he thought. After thinking about it, Yang Fan knew that this was because his body shape was too different from that of the Silver-Horned Python, and the distance had been misaligned in his memory. However, for him who had the Exquisite Heart with Seven Apertures and could see in the dark, this was No matter how long the tunnel is, it always has an end. Half an hour later, he finally passed through the tunnel and emerged from the water. In front of him was a large stone wall with several human figures carved on it. After a cursory glance, Yang Fan felt a little familiar, but soon, his eyes were attracted by a wide sword in front of the stone wall. . The sword was completely black and looked ordinary, but Yang Fan felt that the sword was as heavy as a mountain. Although he did not pick it up or even touch it, he felt this way in his heart. At the same time, the egg in his arms trembled slightly, as if he was very familiar with this sword. Yang Fan walked over, walked to the wide black sword, put down the python egg in his arms, and looked at it carefully. After careful inspection, the original mountain-like heaviness disappeared. Yang Fan was stunned, stretched out his hand to grasp the hilt of the sword, and applied force without pulling it out. When Yang Fan exerted all his strength, the sword moved slightly. . Although he still didn't pull it out, Yang Fan instantly understood that this sword was probably just an ordinary giant sword, and there was nothing surprising about it. Thinking of this, he looked up at the mountain wall in front of him. The humanoid pictures on the mountain wall come into view. "This, isn't this the pattern on the Six Yang True Solution?" Yang Fan was stunned for a moment, and hurriedly took out the booklet hidden in his arms. Before he had time to flip through it, he saw the graphics on the booklet. Suddenly it moved. At the same time, the graphics on the mountain wall also moved. The faster he moved, the faster and faster he moved. Finally, all the human figures turned into one. The booklet in Yang Fan's hand turned into powder with a bang, while the stone wall in front of him slowly opened. "What kind of trouble is this?" Yang Fan was stunned. He never expected that a pamphlet on the True Explanation of Six Yangs could actually open up the mountain wall in front of him. The true solution to Liuyang! Is this the secret cave of Chunyang Sword Immortal Li Daotong? In an instant, Yang Fan's eyes became intense. Without saying a word, he took a step forward, but then he stopped again. He calmed down and looked at the cave opened on the mountain wall. Inside, there was a faint light yellow light, and a cold air rushed towards the face. The cold air was very cold. This coldness came from the body and the soul, and seemed to be able to freeze everything, everything tangible and intangible. "Yellow Spring Warm Jade!" Yang Fan was shocked. Inside the cave, the ground floor is covered with light yellow Huangquan Warm Jade. The so-called Huangquan Warm Jade comes from Huangquan, the netherworld. A small piece of Huangquan Warm Jade contains endless Huangquan cold air. No wonder, no wonder that the silver-horned cold python was promoted to the fourth level after entering here. It turned out that the cold air of the underworld in the warm jade inspired the blood of the underworld cold snake king in its body! Yang Fan, who understood clearly in his heart, was also even more surprised. These warm jade from the underworld, through the cave, could stimulate the blood of the silver-horned cold python outside the mountain wall. So, if you walk inside, what changes will happen? Will he directly turn into an ice corpse, or will he become the Cold Snake King of Underworld in one fell swoop? Just as he was thinking about it, Yang Fan noticed a trace of the underworld's cold air and was pulled over. The egg that pulled the underworld's cold air was the egg that the Silver-horned Cold Python risked his life to lay. This egg came out of nowhere in the Silver Horned Python's memory. It has not mated with any male pythons, because it is the only one here, the Silver-horned Cold Python, and the black water pythons that are lower in rank than it cannot arouse its interest at all. The first time I felt the presence of bone and blood in my belly was after entering this place. That time, the silver-horned cold python, which had already entered the threshold of the fifth-level monster beast, came here to transform, but the result was that not only did it not succeed in transforming, but its strength was greatly reduced, and it had blood and bones in its belly. This makes it strange that although the spirituality of the silver-horned python is far inferior to that of humans, the nature of the mother's body does not resist the existence of the child. As the days get longer, the motherly love for the child in her belly becomes stronger. , the more I want it to be born safely. This is also the reason why the Silver-horned Cold Python will not hesitate to hurt itself again and forcefully give birth to the egg before it explodes. Now, this egg is so strange that it can attract the cold air of the underworld before it is born, which makes Yang Fan even more curious. What is going on with this egg? Is it something divine??A demon spirit, reincarnated? Thinking of this, he walked to the python egg. "No matter how you came here, since you have chosen to follow me, I will accept you." Yang Fan swiped his finger and cut a blood mark on his arm, and a stream of blood poured out. All the blood fell on the big egg. Only when the entire egg was submerged did Yang Fan stop the wound. "Fortunately, I sucked the blood of a whole black anaconda before, otherwise it would be really not enough now." Feeling slightly weak, Yang Fan carefully drew strange runes on the egg. He cannot have true energy and spiritual power in his body. If he wants to form a contract with a monster, he can only choose a blood contract. The blood contract is the most original contract between heaven and earth, and it is also the most unbreakable contract. Da Dan seemed to feel something, and suddenly started to tremble violently. Not only that, the big sword inserted in front of the mountain wall also trembled at the same frequency, as if it was about to fly out. Yang Fan was shocked and started to attack even faster. Fortunately, he inherited Li Changfeng's memory, and Li Changfeng was also the best at this kind of blood contract runes. Soon, the runes were condensed. Dadan instantly became quiet. The sword was also quiet. Immediately afterwards, the blood that Yang Fan poured on the egg began to blend into the egg's body, disappearing bit by bit as if it had been absorbed. As all the blood disappeared, a blood contract was formed. Yang Fan seemed to have a connection with the big egg in his mind. At the same time, when he looked at the big sword, Yang Fan actually had a feeling that he could master it. Could it be that the formation of this egg is related to this sword? At this moment, no matter how slow Yang Fan was, he noticed that there seemed to be some connection between Big Dan and the black sword. However, he did not make a judgment immediately, but walked towards the sword. As soon as his hand came closer, the big sword jumped out on its own and fell into Yang Fan's hand. This sword is very heavy, probably weighing more than a thousand kilograms. Although Yang Fan has nearly 20,000 kilograms of strength, it is still difficult to swing this sword. Every time he cuts, he has to use all his strength to do it. However, the weight of this sword can make up for some of the lack of strength in his body. The weakness of Zhenqi, if you slash it with a sword, it would be very difficult for even an innate martial artist to resist head-on. "What a sword!" After waving it a few times, Yang Fan smiled and praised it. After inserting the sword back into the ground, Yang Fan took his hand away, and a deep feeling of reluctance appeared in his heart, as if he had lost the most precious treasure. "It looks like I'm going to get along with this sword day and night from now on." With a wry smile, Yang Fan picked up the sword again. After thinking about it, he tore off a piece of cloth and tied the sword to his back. This time, I feel much more relaxed. After doing this, Yang Fan once again cast his eyes on the cave that was suspected to be Li Daotong, the Pure Yang Sword Immortal, and was covered with warm jade from the underworld. "I'm afraid this is really the cave of Chunyang Sword Immortal. Otherwise, who could have such a big hand to pave this entire cave with warm jade from the underworld that is rarely seen in the underworld?" Turning around, Yang Fan He laughed out loud: "What am I doing with all these guesses here? You'll know if you go in and take a look, right?" Facing the cold air that hit his face, Yang Fan stepped into the cave.