In front of the two of them was a majestic mountain, with its high tip reaching into the sky, a rich aura lingering around the mountainside, and there was silence all around, except for the occasional chirping of a few geese flying by. A sheep's intestine trail winds through the valley, and the trail is crowded with mornings, as if no one has been here for a long time.

For some unknown reason, the mountain is not shown on the map. If it weren't for Duan Yun and Duan Long stumbling into each other by mistake, it would have been really difficult to find here.

Along the path, a huge mountain gate stood in front of the two of them. Outside the mountain gate, there are two pillars, these two pillars are as white as jade, but the strange thing is that these pillars are not as thick as up and down, but the higher they go, the sharper they become. When I looked up, I saw that there were two identical pillars hanging down from the opposite position below.

This strange scene made Duan Yun suspicious in his heart. Just when he hesitated, the impatient Duan Long had already walked in.

Anyway, wealth and wealth are in danger, even if it is the tiger's den in Longtan, you can only go to break through now.

Duan Yun thought so and walked towards the mountain gate.

However, just as he stepped into the mountain gate, he felt a strong and incomparable repulsion coming towards him. Caught off guard, Duan Yun was thrown out.

"Dragon Holy Land, death to foreign trespassers! For the sake of you being that little fellow's companion, spare your life. Hurry away, the little guy who just went in has a relationship with us dragons, and I won't hurt him. When the time comes, you will see each other. An ancient voice sounded in Duan Yun's heart.

"Who is the senior?" Duan Yun shouted loudly.

However, in the valley, there was no movement except for his echoes.

Along the way, Mu Lin and Duan Long, who were closest to him, left him one after another, which made Duan Yun's heart empty. But he didn't feel any malice in the voice's words.

In fact, Duan Yun also knew that if the owner of the voice really wanted to deal with him, he might be able to crush himself to death with a single finger. Since this is Xiaolong's chance, Duan Yun will naturally not be emotional. Caring for someone is not about taking them with you every day, and letting go is sometimes a kind of love.

Glancing nostalgically in the direction where Duan Long had disappeared, Duan Yun walked alone in the direction he had come.

However, before he could go far, Duan Yun heard the valley shake violently, and huge rocks rolled down from the top of the mountain, rolling up the dust. And just after everything had quieted down, he was taken aback.

It turned out that the location of the mountain gate was empty, and an incomparably huge deep ditch appeared in front of him. Duan Yun could vaguely see a giant dragon several hundred meters long in the distance drilling into the ground.

He finally knew what the mountain gate was before. Where is the mountain gate, it is clearly the mouth of this dragon, and the two pairs of corresponding pillars up and down are the teeth of the dragon!

Thinking of this terrifying scene, Duan Yun's heart palpitated, even if the dragon had no malicious intent, but the thought of almost entering someone else's stomach made him feel uncomfortable.

Take care, little dragon!

Duan Yun thought silently in his heart and quickly left this mysterious valley.

He had been busy with Mu Lin's affairs before, and Duan Yun couldn't be separated. But he naturally came to the secret realm for his own purpose, that is, to find a fire for alchemy.

It was a fool's dream that ordinary furnace fire was used to refine pills above the third level, and with the improvement of Duan Yun's realm, the low-level pills could no longer meet his needs, so a good fire was especially important.

Taking out the map, Duan Yun began to search for nearby places where there might be fire.

But all kindling is generally found in the coldest or hottest places, which can be said to be a secret that alchemists know. But if you want to really subdue the fire, you have to risk great danger, which is also the reason why high-level alchemists are scarce.

Staring at the map, Duan Yun's brows tightened.

The map does mark a place called the Ice Valley, but it is heavily crossed with a red cross. After this period of experience, Duan Yun knew that all the places with red crosses on the map were forbidden areas.

It's not that there is only one place in this secret realm, but other places that are extremely cold and hot are too far away from his current location, and the time to close the secret realm is running out, and it is a question of whether he can reach those places, let alone subdue the fire.

Duan Yunya gritted, his heart was horizontal, and he fought hard! Putting away the map, he still galloped towards the cold ice valley thousands of miles away.

There was no trouble along the way, and after more than ten days of long-distance travel, Duan Yun finally stood in front of the Cold Ice Valley.

It's a frozen world, and the remains of creatures frozen in ice can be seen everywhere. The bitter cold wind blew on a person's body like a knife.

Just standing at the entrance of this cold ice valley, Duan Yun's clothes crumbled like tattered, blood marks appeared from his body, and he turned into a bloody person, looking extremely terrifying.

Fortunately, the Vajra Body gave him a strong recovery ability, and after taking a deep breath, Duan Yun braved the cold wind and walked inside with difficulty.

As it progressed, the cold wind became several times stronger than before. Duan Yun's flesh and blood had gradually begun to separate from his bones, and continuing to move forward was tantamount to seeking death, in fact, he couldn't take a step at all.

It seems that he still underestimated the horror of this cold ice valley, and endured the severe pain, Duan Yun cried out in pain. But he was quite unwilling to go back like this.

In desperation, Duan Yun had no choice but to stop, and while thinking of a way, he took out the pill and recovered his broken body as soon as possible.

After taking the Healing Pill, a stream of heat flowed through his whole body from the dantian. The separation of flesh and blood was finally suppressed for the time being. New flesh and blood are gradually growing at a rate visible to the naked eye.

And the newly born flesh and blood was obviously much stronger than the previous ability to withstand cold, and in this extreme environment, Duan Yun's vajra body faintly showed signs of breaking through the sixth fold.

Seeing this situation, Duan Yun's eyes lit up. Maybe that's the turning point.

So, he gave up his intention to move on for the time being. The Healing Pill was sent to his mouth desperately, although the speed of taking the pill made Duan Yun a little painful, and it would even bring huge hidden dangers. But he couldn't care about that much.

As the last healing pill turned into a stream of heat, Duan Yun's vajra body finally broke through to the sixth level in the midst of repeated destruction and repair. At this time, Duan Yun was like a serious illness, and his whole person collapsed.

However, to his surprise, the Sixfold Vajra Body that had broken through in this environment not only made his body stronger than steel, but also formed a layer of ice on the surface of his skin. This layer of ice kept the biting cold out of the body, so the previous painful feeling was instantly eliminated.

After a brief rest, Duan Yun stood up and continued to walk towards the depths of the Cold Ice Valley.