The name of this Demon Battlefield Secret Realm obviously did not live up to its name, and the two began to change the name of this secret realm to the Underground Secret Realm. Along the way, the resources in this underground secret realm are very rich, but the two of them did not stop mining. Cultivation is the foundation of a monk, and it takes a lot of time to mine resources, but it does not bring direct benefits to cultivation.

Zheng Yijian collected some of the ores needed for sword practice, and slowly, the temperature of the two of them became higher and higher, but they gradually came to the edge of a sea, the water in the sea was boiling, and a large amount of water vapor filled the surrounding air.

It took Jiang Lin half a year to walk to this beach, and his injuries were healed. When he saw such a strange sea, he asked in amazement, "What is this, a super-large hot spring?

Zheng Yijian shook his head and said, "I think it's a good thing, you think about what kind of underground we are now." ”

Jiang Lin nodded and replied, "It makes sense, we are now under the ground overseas, and there should be a place where this sea communicates with the ground." ”

Zheng Yijian said with a smile, "With you by your side, although it is the same everywhere, since I have found some clues, it is not bad to be able to go overseas for a walk." ”

Jiang Lin pretended not to hear and did not reply. Since Jiang Lin was injured again and came to his senses, Zheng Yijian occasionally expressed one or two sentences of his inner feelings.

The temperature of the water is not too high, only a few degrees higher than body temperature. The two cut down a few trees, tied them together, and made a simple bamboo raft, but Zheng Yijian used the long sword in his hand as an oar and rowed forward. This also brought Zheng Yijian another kind of feeling, it was the first time to do this with the long sword in his hand.

The temperature of the sea slowly increased as they advanced, and even became a way for the two to control the direction.

As the temperature of the sea rises, the concentration of water vapor on the surface of the sea becomes higher and higher, and the field of view becomes smaller and smaller. A mountain towering into the sky, and a vague outline gradually appeared in front of the two of them.

Jiang Lin carefully swept the surroundings of the mountain with his divine thoughts, and said to Zheng Yijian, "You are right, this is really possible to bring us back to the ground." The water of this sea flows down from the mountain, which is supposed to be directly above the ground, and it is also an active volcano, and there is fire magma flowing under the mountain. ”

Zheng Yijian nodded and said, "The small water on the mountain flows downward, and then erupts through the volcano, but it also forms a cycle. Let's go up and take a look. ”

Jiang Lin said worriedly, "We won't just run into a volcanic eruption, the power of nature is not to be underestimated." ”

Zheng Yijian said with a smile, "Every time a volcano erupts, tens of thousands of years apart, how can there be such a coincidence. ”

Jiang Lin thought about it, but still followed behind Zheng Yijian and climbed up the mountain. This is not the Tianshan Mountains, but the speed of climbing the mountain is hundreds of times faster.

Due to the weathering of the volcanic eruption to form fertile soil, a large forest has formed on the volcanic mountain, and a kind of red nameless flowers and plants grow in the forest, but Jiang Lin has collected some along the way. The water flowing down the hill also provides a good environment for these trees to grow. These streams of water are cool, Jiang Lin squatted by the stream, washed his face with cold water, and beckoned Zheng Yijian to try it too, in this high-temperature environment, washing his face with cold water is also a pleasure.

Zheng Yijian turned around and saw Jiang Lin squatting by the stream, a drop of water slowly flowed down from Jiang Lin's forehead, and the hair on the side of his face was also slightly sticky, drifting slightly in the wind, but it was like seeing a painting. There was a shih in the eyes of the lover, and after Zheng Yijian installed this person in his heart, he felt abnormal when he saw everything.

Jiang Lin froze when he saw Zheng Yijian turn around, covered his forehead and sighed in his heart. In order to interrupt this awkward atmosphere, Jiang Lin asked Zheng Yijian, "Look at this small stream, we shouldn't be able to return to the ground through these gaps. ”

Zheng Yijian came back to his senses and nodded in reply, "Of course, this should just be the stream of water that flows down from the gap in the barrier around the mountain. But don't forget that this is an active volcano, and there must be a passage in the middle of the mountain that leads to the top. I tried it just now, and the material of this mountain is very hard, and I can't dig a passage into the middle of the mountain. Since this is an active volcano, you can definitely find a cave in the middle of the mountain. ”

Jiang Lin nodded in agreement, not all volcanic eruptions erupted to the top of the mountain, and some fire magma would also flow out of the mountain. After many eruptions, some large caves will be formed, and there are many of them.

Sure enough, the two searched for a few hours, and found a huge cave halfway up the mountain, and saw countless forks in the cave, which reminded Jiang Lin of his experience on the mountain in Shennongjia. The bitter taste of the moss plants in that cave still makes Jiang Lin remember it vividly. The bitter taste is always more memorable than the sweet.

The direction is not easy to judge is not a problem for the two of them at all, the two of them are used to walking slowly, and it is not so important for the two of them to get out of the underground secret realm. One is to enjoy this atmosphere, and the other is to use this feeling to dissolve the artistic conception in the divine thoughts.

Under this mentality of the two, no matter how long the cave is, there will eventually come to an end. At the end of the cave is a cliff, looking down at rolling lava, and looking up at finally the blue sky. Sure enough, the volcano goes straight to the ground. Seeing the familiar sky again made Jiang Lin's heart feel relieved.

Zheng Yijian pulled Jiang Lin at this time and motioned him to look up carefully. Jiang Lin scanned it with all his might, and there was indeed a place on the cliff wall above his head that seemed to have something, but he couldn't sense it clearly.

Jiang Lin asked strangely, "What the hell is that, just such a little distance, there is no reason to feel it clearly." ”

Zheng Yijian explained, "You can sense it, it is already considered a very high level of divine thought. It seems to be an immortal hall, but I don't know who would have thought of placing the immortal hall in such a place, it seems that we want to go back to the ground, and we need to plan carefully. The power that can leave the Immortal Hall is not comparable to the powers that have fought with us, not to mention, the Immortal Hall is also the only trace that a person like them at the peak can leave, which will make them use all their efforts. ”

Zheng Yijian said, controlling the long sword and flying up to test it. Sure enough, before the long sword could get close to the Immortal Palace, it was shot down. Zheng Yijian hurriedly withdrew his long sword and was almost knocked down into the magma.

Jiang Lin said with a smile, "This is too simple, the Immortal Hall doesn't know how many years ago, there must be a passage above, let's go up to find a passage, there is no need to find a way to break through, the passages in this volcano are basically connected." ”

Zheng Yijian patted his head, nodded and said, "Yes, this is the most appropriate way." We're not in a hurry anyway. ”

The two turned around and entered a state of slow strolling again. Each passage left a mark, giving preference to the upward passage, and the two returned to the cliff again and again, and after judging the location, they found the way again and again. Finally, half a year later, I found a cave located above the fairy hall.

The higher the mountain, the smaller the channel through which the magma will emerge, due to the reduced pressure. The passage that the two of them found at the end was obviously much smaller than the previous ones. But no matter what, the two of them finally found a way to leave the underground secret realm.