Xu Feiyang sat cross-legged, operating the true yuan according to the exercises given by Uncle Muyun, and attracted strands of silver to the flesh and blood.

To be precise, the so-called refining of the Qi of Heavenly Killing is actually the use of Qi and blood as nourishment to nourish the Qi of Heavenly Killing into the acupoints. This process is extremely dangerous, and if you don't pay attention to the heavenly killing qi, it will destroy the body, corrode the meridians and acupoints, and even devour the soul, making people die. If it weren't for the last resort, Xu Feiyang wouldn't dare to try this method, after all, no one knew what would happen during the guidance process.

What's more, according to the introduction of the refining method, even if the trick point is introduced, the heavenly killing qi accumulated by the sun and moon will continue to wash away the barrier of the trick point, and if the physical body is not strong enough, it is also very easy to be eaten by the heavenly killing qi. Unless the Mahayana realm of returning to the void is reached, and the physical body acupoints have reached the ability to transform reality and return to the void, it will not have a negative impact on the physical body.

Xu Fei raised his eyebrows and tightened his eyebrows, reciting the Fa over and over again, running the true yuan and qi and blood back and forth, so that the silver filament was attached to the qi and blood while absorbing the true element, and then constantly introduced the qi and blood into the meridians.

The whole process seems simple, but it is dangerous. I saw that as soon as that trace of heavenly killing qi entered the meridians, it rushed straight into the bloodline, frantically absorbing the power of the true yuan contained in it. With the loss of spiritual power, the silver filaments became thicker and thicker, and there was a tendency to differentiate again.

Xu Feiyang sensed this scene, his heart was ruthless, and he suddenly increased the infusion of the true yuan, wanting to forcibly pull this trace of heavenly killing qi into the trick with a huge true yuan.

That strand of silver filament went like a bottomless pit, and as soon as the huge true yuan touched the silver filament, it instantly turned into nothing. On the contrary, it contributes to the activity of silver wires.

The silver filaments rushed into the flesh from the blood like loaches, bringing up the blood and oozing out of the skin, but they slid into the veins like fish playing in the water, and instantly came to the wound on the waist, and joined the other dozen or so silver filaments.

Xu Feiyang's face turned pale, he took off his clothes, and found a deep blood mark from his waist to his armpit. His breath was chaotic, and he sighed a little weakly, and continued to repeat the action just now.

Time flickered, a day had passed, and the remnant sun in the west had once again set west under the distant mountain peaks.

In the fifth layer of the space cave of Lingji Peak, Xu Feiyang's clothes had already faded, and at this time, his whole body was blood-red, like a bloody person, his breath was completely chaotic, his face was pale, his body was no longer straight, but slightly bent, and his big palm was caressing the wound on his waist with some pain.

It's just that the wound at this time is no longer a small sword mark, but a blood-red mark the size of a palm, and that piece of flesh has already rotted and fallen under the erosion of the repeated heavenly killing qi. If you get closer, you can also see the white bones around your waist and the internal organs connected to them.

"This aura is really difficult, if it goes on like this, I'm afraid that sooner or later I will fall on the spot. Xu Feiyang muttered to himself, a look of defeat appeared on his face, obviously he had no confidence in refining the Heavenly Killing Qi.

"There is nothing wrong with the Fa, there is nothing wrong with the order of guidance, and I even channeled it with my divine sense, but unfortunately it was also devoured. How can I refine it? Can I, Xu Feiyang, really have to accept my fate?" Xu Feiyang shouted in his heart, constantly recalling the guidance process of the past day.

"No, I can't accept my fate!" Xu Feiyang secretly shouted in his heart, took out two medium-grade spirit stones, clenched them with his left and right hands, and frantically absorbed the spirit stones to restore the true yuan.

After the repeated absorption of the true element by the silver wire, at this time, his true element was no longer the third layer in his heyday, and he could only continue to guide after making up for the true element.

It's just that at this time, the silver filaments are no longer the more than ten at the beginning, but have reached as many as thirty-five! Under the condition of repeatedly absorbing qi, blood, and true yuan, the heavenly killing qi is also constantly differentiating, and the wound on the waist is spreading faster and faster.

A quarter of an hour later, feeling that the True Yuan had reached a full state again, he temporarily left it by his side, and began to inject the True Yuan again, differentiating and guiding the Heavenly Killing Qi.

"The true element that the qi filament absorbs every time is limited, what if I can concentrate the true element of my whole body and forcibly drag the silver filament into the acupoint?

Xu Feiyang thought of a detail, every time the Heavenly Killing Qi absorbs a certain amount of true yuan, once it is full, it will enter the skin, and then follow the blood veins back to the skin and flesh around the waist.

Do what you think. Xu Feiyang concentrated the power of the true yuan of his whole body, forcibly wrapped a trace of heavenly killing qi, and then ran the law to pull it fiercely towards the Qi Sea Acupoint.

Sure enough, after this and silver filament were fully absorbed, the remaining true yuan was still as stable as ever.

Xu Feiyang was overjoyed in his heart, and the speed of pulling increased sharply, and he pulled into the Qi Sea Cave with a "whoosh". He suddenly breathed a sigh of relief, as long as this method was feasible, then as long as it took a little more time, the guidance of the roots would sooner or later be able to introduce all of them into the acupoints.

Before he had time to rejoice, that heavenly killing qi was divided into two and two into four in the sea of qi, and it was divided into four silver wires at once.

The four silver filaments suddenly scurried in the hole, and no matter what means Xu Feiyang adopted, the silver filaments were still not at peace.

Xu Feiyang eagerly wrapped it in his essence and blood, wanting to use it to nurture it in the acupoint. It's just that what he didn't expect was that before he could make a move, the four silver threads "smacked", and all of them returned to the rotten rotten flesh around their waists along the blood, as if this was their home.

Seeing this scene, Xu Feiyang couldn't support it anymore, a mouthful of old blood spurted out, his fists clenched, his head hung down, he was half-bent, his forehead was on the ground, and he didn't get up for a long time.

Although he had worked hard, the results were consistent, which made his little confidence wear down.

"Is it really going to die? Is it true that I, Xu Feiyang, will die in a mundane attack?" Xu Feiyang kept asking himself in his heart, and he was very remorseful for his previous heroic deeds.

"Even the attack of the meteorite outside the sky has not made me fall, can a mortal take my Xu Feiyang's life?" Xu Feiyang thought that he was hit by a meteorite and accidentally obtained the Qiankun Tower, and at first he thought that he was going to die on the spot, but then he survived strongly.

"Fate is really so unfair! I, Xu Feiyang, have a peerless school, and the Heaven and Earth Supreme Treasure Qiankun Tower, but I have to fall on the spot because of an attack by a mortal boy, it's really ridiculous, ridiculous!" Xu Feiyang seemed to be crazy before, and kept talking to himself there.

"yes, no! There is a way, there must be a way. No matter what this god-killing aura is, the Qiankun Tower, as the treasure of heaven and earth, can definitely deal with it. Xu Feiyang seemed to suddenly open his mind, and he almost laughed.

I sensed the true yuan on my body, and found that there was not much true yuan left, so I had to pick up the remaining spirit stones again and replenish the true yuan.

"How can we use the Qiankun Tower to refine the Heavenly Killing Qi? The use of Qiankun is still only limited to the storage function. The biggest role of the Qiankun Pagoda now is that it can transform the qi that is really thought to be chaotic, and the chaotic qi cannot be stored with the current cultivation, but the chaotic qi can circulate in the meridians. ”

According to legend, the Qi of Chaos is also the most primitive Qi of the beginning of heaven and earth, and the Primordial Stone is also transformed by the primordial qi of the beginning of heaven and earth. When Xu Feiyang thought of this, he seemed to have found a breakthrough, and he had to restore the power of the true yuan to try it.

He glanced down at the thirty-eight and Heavenly Killing Threads that were constantly eroding flesh and blood, and the speed was already several times faster than before. He didn't even think in his heart, this might be his last hope, right?!