Demon Haze Valley, regarded as the most terrible taboo place by Wu Xuanzong, is located between the four peaks of Yaoguang, Kaiyang, Yuheng and Tianquan, narrow and far-reaching, looking from the top of the mountain, the valley is shrouded in a layer of haze all year round, and it was once the place where the head of Wu Xuanzong fell.

Zhang Xiaofang is at the bottom at the moment.

When his cultivation realm reached the realm of the first glimpse of the Three Yang Gathering Peaks, after nearly four months of cultivation, he finally discovered a serious problem - there were great congenital defects in his bones and blood.

In order to continue to gain the refinement of cultivation, it is necessary to transform the bone blood, and the transformation of the bone and blood requires a bone and blood essence with strong potency.

Gu Yu once said that she had seen a corpse at the bottom of the Demon Haze Valley, and she estimated that the corpse of the head of many fierce beasts in the Demon Haze Valley a long time ago, and next to the corpse, there was also a human bone, which was probably the skeleton of the head of the legendary Wu Xuanzong who fell.

To be able to become the head of Wu Xuanzong, the cultivation realm must be very high, and the fierce beast that can make a head of the cultivation realm fall can be imagined.

Zhang Xiaofang wanted to find the remains of this fierce beast head, hoping to extract the essence of bone and blood with strong potency from its corpse.

He had been deep into the valley floor for four days, and he had been traveling eastward along the valley floor, and according to Gu Yu, the corpse of the fierce beast was at the thickest place in the east of the valley floor.

Zhang Xiaofang and Gu Yu's illusory figures marched forward in tandem.

The fog here is getting thicker and thicker, and they are very careful, although Gu Yu has a coercive power over the fierce beasts here, which can make them all retreat, but no one dares to ensure that in such a thick and gloomy mist, there will be no other unpredictable dangers.

The fog became thicker, and Gu Yu suddenly said, "I remember that it should be in front!"

There was only fog in front of him, a dense fog surrounded by black and purple gas, and he couldn't see his fingers. Zhang Xiaofang and Gu Yu stepped forward step by step, their surroundings filled with all kinds of strange sounds, and at the same time, they were also surrounded by a strange aura.

"It seems that there is some prestige here, was that how you used to be here?" Zhang Xiaofang asked softly.

Gu Yu nodded slightly, and said, "Yes, this place is more terrifying, I only went here once in order to find a way out, and then I never came here again because I thought it was terrible!"

Zhang Xiaoyan didn't speak, he had already deeply felt the horror here.

Continuing to walk forward, suddenly Zhang Xiaofang's feet seemed to touch something, and when he looked down, there was only fog, so he had to squat down, and then he faintly saw that it was a piece of white bone.

Gu Yu was beside him, and he also squatted down, and exclaimed: "This is it! This should be the tail of the corpse, which has been extending forward for about twenty zhang since then is its head, and not far from the specific head, there is a human bone!"

According to this, more than 20 zhang away is the head, and he is really a big guy!

The two of them followed the skeleton forward, meandering around, and finally saw its skull - a white skull the size of a house, plus a body that stretched for more than 20 zhang, Zhang Xiaofang recognized its identity, this is an exaggerated giant python.

Such a behemoth, its bones are absolutely extraordinary, and Zhang Xiaofang is more confident in extracting the essence of bone and blood from it.

He smiled at Gu Yu, suddenly mentioned his true qi, and released a blue light mana from the palm of his hand to envelop the skull python head the size of a house.

This is a refining technique that can coagulate the blood essence contained in the skull python's head, and the remaining impurities will also be turned into dust and dissipated.

As Zhang Xiaofang continued to refine, the skull python slowly shrank and gradually condensed, and as a result, the black qi mixed in the mist began to gradually weaken, just like this, he refined for more than two hours, and finally got a piece of silver glittering, with countless blood-colored lines, the size of half a palm.

Gu Yu looked at the crystal in Zhang Xiaofang's hand in amazement, and said, "It's really amazing, such a big skull python is actually refined into such a small piece of essence by you, I think it must be very effective!"

Zhang Xiaofang shook his head slightly, and sighed: "Probably the age of the demise of this giant python is too long, and the essence it contains is really a little little, I am afraid that the entire giant python's spine needs to be refined!"

Gu Yu was surprised: "Ah! It's all so much, and it's still less?"

Zhang Xiaofang said: "Although it looks like a lot now, this is just an unrefined appearance, once refined, I am afraid that there will only be one drop left at most." ”

The amount of black contained in the fog is now much reduced, making the fog more purple.

Zhang Xiaofang didn't pay attention to these, and as soon as Zhenyuan moved, he began to refine the giant python's spine again. The giant python of more than 20 zhang is very difficult to refine the spine, and Zhang Xiaofang has been refining it for ten hours before finally refining it into a ball of essence, and the size is only the size of a palm.

The essence refined twice, and then refined, it was probably enough for him, Zhang Xiaofang finally breathed a sigh of relief, after he put the essence of the primary refinement into the Yourong sachet, his body suddenly weakened, and he collapsed to the ground.

He was so tired, the true yuan was depleted, and he needed a rest, and he didn't pay attention to the strange changes in the fog around him.

After the python's head and spine were refined, the black qi in the mist almost completely disappeared, and the remaining purple qi immediately raged, circulating and gathering in the mist, and began to surround Zhang Xiaofang and Gu Yu.

Gu Yu was shocked by this, and exclaimed, "Zhang Xiaofang, let's get out of here quickly!"

Zhang Xiaomad didn't react, Gu Yu was in a hurry, and immediately got into Zhang Xiaomad's body, controlled his body, and used his mana to break through the fog and jump out.

However, the gathered purple qi did not give up, and followed him closely, so fast that it was unexpected, and before he could escape far, he was surrounded by purple qi.

This condensed purple qi is by no means just qi, it is a powerful energy that really exists, and even Gu Yu can clearly feel an absolutely powerful pressing force.

"What should I do?" Gu Yu asked Zhang Xiaofang through his thoughts.

Zhang Xiaofang placed his trust in the heavenly spirit, observing the purple qi around his body, and suddenly realized something.

"Gu Yu, take out the bone and blood essence of the giant python from the sachet of Yourong and throw it out, this purple qi is to imprison the bone and blood essence of the giant python, and it will not harm us, but if those two pieces of bone and blood essence are on us, I am afraid that we will be trapped by the purple qi!"

Gu Yu immediately complied, and sure enough, he saw that the purple qi was converging in the direction where the two pieces of bone and blood essence were thrown.

"What's going on?" Gu Yu asked with trepidation.

Zhang Xiaofang said: "I'm afraid this is the remnants of the obsession breath in the soul of the ancestor of the Wuxuanzong ancestors! He didn't hesitate to kill this murderous python at the beginning, and then he really died with the giant python, but after his soul was broken, this obsession breath did not disappear, and he still imprisoned the remnants of the giant python, so that even if we have refined the remnants of the giant python into essence, we can't take it away!"

Gu Yu said: "Then what should I do? Isn't it a trip for nothing?"

Zhang Xiaofang said: "This will not be, not only will it not come in vain, but you can also get unexpected gains!"

"Windfall?" Gu Yu wondered.

Zhang Xiaofang smiled and said, "This bit of obsession left by the ancestors, if it is used to nourish your Yuan Soul, it will be of great benefit to you!"