Barely moving forward sixteen feet, Mu Fei was forced to stop.

This distance of sixteen zhang, he paid a great price. In the sea of dantian qi, the two wood qi vortices, which were originally like surging rivers, were finally completely exhausted, turning into empty exhaustion vortices.

Sitting cross-legged, Mu Fei continued to frantically absorb the black vitality.

Soon, another ten days passed, and the condensation of the black air vortex had reached as much as ninety. Sure enough, the closer you get to the depths, the faster the condensation of the black gas vortex, but at the same time, the danger is also extremely high.

The place where the black mountains and rivers meet, suspected to be a place of extreme yin, and the bone-eating chill it exudes is becoming more and more obvious. Even Mu Fei gradually felt the need to exsert his vitality to fight against it.

Mu Fei noticed that after two more feet ahead, it seemed to be a little different.

There was a full fifty zhang distance from the black stone platform, and it was slightly different from the black here where Mu Fei had traveled hard, there was still some dark red color in it, and there seemed to be a blurry halo that could not be perceived clearly.

This is yet another new discovery.

Mu Fei could be sure that when the condensation of his black qi vortex did not reach ninety percent, even if his soul perception was strong, he did not notice the difference there.

Taking a deep breath, Mu Fei decided to rush out of the somewhat terrifying 'two-zhang distance' in front of him.

The reason why I said horror was because Mu Fei had already felt that the vitality of one of the Earth Qi Vortex was also completely depleted at this time. In other words, the consumption of vitality in his qi vortex increased dramatically, and the speed was amazing.

If you stay here, maybe within ten days, the black air vortex will truly condense successfully. But now that he had come here, and a very likely rare 'Extreme Yin Land' was in front of him, Mu Fei had no reason to give up.

After carefully taking a shallow sip of Tianer wine, Mu Fei took a step forward with a solemn expression.

The terrifying gravitational oppression is instantaneous!

When Mu Fei stepped out of the half-zhang, he already felt that he was about to reach his limit.

Gritting his teeth, Mu Fei immediately frantically operated the Golden Qi Vortex to the limit, almost completely ignoring the consumption.

When the golden qi vortex dried up, Mu Fei finally stepped out again.

Then, the remaining Wood Qi whirlpooled wildly, and finally when it was completely exhausted, Mu Fei stepped out half a foot again.

This was followed by the water whirlpool!

In just two zhang distance, Mu Fei used three qi vortices.

Now his dantian qi sea has all six qi vortexes exhausted. There was only one fire whirlpool and one earth whirlpool left, which were not exhausted. He was unable to absorb the Five Elements Vitality between Heaven and Earth, and after the Qi Vortex was exhausted, it was extremely difficult to replenish it.

Fortunately, after finally carrying the distance of these two zhang, Mu Fei suddenly felt light. He was pleased to feel that even if he didn't use the repulsion of the Gravity Dao Technique, he would be able to withstand the current gravity oppression.

It seems that his guess is not wrong, and there is really a difference between this and the fifty zhang distance.

As far as the eye could see, it was still endlessly black, except for a faint dark red and eerie halo on the earth, extending to the black foot of the mountain in front of it.

Mu Fei followed the black and red earth, penetrated the halo, and cautiously walked towards the foot of the black mountain.

Gradually, the chill grew worse, and he could clearly feel the frozen ground beneath his feet, hard and cold. His eyebrows began to frost, and his clothes began to become cold and hard.

In order to retain his vitality and strength, Mu Fei deliberately did not use the Fire Qi Vortex and Dao Fire. Only relying on the flesh and blood body that had been transformed by the gravity Dao fruit and the remnants of the distant ancestors, he fought against this cold.

When he came to the foot of the mountain, Mu Fei was already a little trembling, but it was far from his limit, and he was still trying his best to resist. The slightest trace of cold qi penetrated through the flesh and blood tendons, and gradually penetrated into all parts of his body, leaving countless traces of hoarfrost everywhere the cold qi passed.

Half of the mountains in front of me were dark red. The strange halo became more and more obvious, and it faintly formed the shape of a 'gate' on the huge rock wall.

There's still an endless amount of black all around, and black always seems to be the dominant color here.

For a moment, Mu Fei couldn't help but want to step into this 'door', and the thought was extremely strong.

It's just that at the moment when his footsteps were raised, the Aoki token in his dantian qi sea suddenly flowed out a dark black light strangely, heading straight for Mu Fei's soul sea.

Mu Fei was a spirit, and immediately suppressed the idea of wanting to enter this 'gate', quickly retreated, and then glanced at it from a distance, and then hurriedly rushed towards the other side of the mountain, which was extremely calm, like a stagnant river.

The calm water of the river, still eeriely black, could be seen to be flowing slowly, but the flow speed was extremely slow, and the river surface was endless, which also blocked Mu Fei's way forward.

He couldn't sense the other side of the river, and he couldn't see it at all, Mu Fei knew that with his current strength, there was no way to cross the river at all.

But his goal was not here, but the extremely cold place where the mountains and rivers meet.

The air seemed to be frozen, and Mu Fei didn't take a few steps towards the intersection before he felt a little difficult to breathe.

At the foot of the mountain there was a huge rock, over which the black river flowed, and every ten breaths, it was completely exposed, and then it was submerged by the black river, and so on.

The bone-eating chill emanated from under the rock.

Mu Fei was about to walk under the rocks at this moment. It's just that he felt that it was getting harder and harder to breathe, and a bad feeling rose in his heart. If you force yourself near the rock, you may be in danger of your life.

Mu Fei thought for a moment and didn't rush forward. Be careful to sail the ship of ten thousand years, Mu Fei understands it well.

So he sat down cross-legged, and Mu Fei decided to be right here, condensing a complete black qi vortex.

The Nine Turns Immortal Technique was running wildly, and with the special breath inducing, the black vitality gathered towards Mu Fei like a storm.

The condensation speed of the black air vortex was unprecedentedly fast, and even Mu Fei himself was stunned.

However, the surprise quickly turned into a shock.

The black air vortex was about to close end to end and become a real air vortex, but no matter how hard Mu Fei tried, the air vortex could never close.

Mu Fei was naturally unwilling, and spent several days in a row, but still unsuccessful.

"It's weird. What the hell is going on?The previous Qi Vortex was all so easy to condense successfully, why is this Black Qi Vortex so difficult?" Mu Fei forced himself to calm down and began to seriously think about the reason.

Gradually, Mu Fei's mind suddenly became clear.

"Yes, the previous Qi Vortex was all condensed by the powerful Yuan Qi of Dao Fruit or Yuan Stone, and I couldn't sense the Five Elements Yuan Qi in Heaven and Earth at all. And this black vortex can be sensed by me, and it completely relies on a little bit of absorption into the body for condensation. Is this the difference? Is there a bottleneck or a special method to coagulate by inhaling into the body by itself?"