Lu Kun was suspended in mid-air, looking at the cloudless blue sky, and a look of worry gradually appeared in his eyes.

It took him three months to refine the bone treasure by himself, and he had to add a third type of underworld magic attribute to prevent the fusion of mana and qi and blood magic.

And the bone treasures of these disciples are much weaker than his Chaos Demon Bones, even if the qi and blood magic power is only in the late stage of the Formation Dan, the refining speed should far surpass him.

But now more than a month has passed, and none of the disciples have generated physical source power, which is a bit strange.

"Hey, it's coming!"

Lu Kun suddenly raised his head and looked at the sky, layers of black clouds appeared out of thin air, and one after another spiritual energy vortex and demonic energy clouds were surging from all directions.

"It's Qingtian, this kid!"

Directly below this calamity cloud was Zhao Qingtian's temporary cave mansion, where the demonic qi and spiritual energy were also extremely active, frantically converging inward.

Lu Kun raised his eyebrows: "Strange, the moment the physical body source power is generated, the magic power and mana are in a semi-fused state, and there will be a force field within a range of five zhang, and the cave should be shattered by this force field." ”

He hesitated, and did not forcibly break Zhao Qingtian's cave mansion, for fear that his joining would lead to the variables of the thunder tribulation.

Although Lu Kun didn't know the number and power of the Thunder Tribulation, the first few Thunder Tribulations had to be passed by himself, otherwise the rules of heaven and earth would not produce special life force, and without this energy, magic and mana would not be able to merge.

The magic energy generated by the two is the foundation for maintaining the source power of the physical body, otherwise the remaining thunder tribulation will not be able to fight at all.

The heavy thunder of "boom ......" came, as if it hit people's hearts, which made people tremble.

A cyan thunder pillar with a grinding disc thickness fell from the sky, this thunder tribulation was different from what Lu Kun had crossed, and it contained another kind of destructive power, which seemed to be a combination of wood demon attributes, and this power was no less than the full force of the early Yuan Infant monk.

Lu Kun looked towards the location of the cave mansion, and suddenly his face changed greatly, and he lost his voice: "Qingtian!

Yue Longfei on the side also looked over, and couldn't help but gasp.

The prohibition of the temporary cave and a large number of rocks were split into nothingness, and the thick cyan thunder pillar was wrapped in a vague shadow,

It was a dull humanoid skeleton with only one leg, and a number of green spots on the surface of the bone, as if it had been poisoned by some kind of poison.

On the ground on the side, there were two arm bones and a whole leg bone, and there were small holes densely laid on them, and a layer of black liquid was faintly visible inside.

The humanoid skeleton seemed to be unable to move, and could only passively accept the destruction of the lightning tribulation, and the aura on the skeleton became more and more dim, and even appeared scorched black.

The limb bones that fell off on the ground melted at a speed visible to the naked eye, and the black liquid inside was also annihilated by the power of the thunderstorm.

After more than a dozen breaths, this cyan thunder pillar exhausted its power, turned into a blue-black energy mass, and submerged into the broken human bones, the original extremely weak breath gradually stabilized, and there seemed to be a lot of energy surging and creaking inside the bones.

Lu Kun's face was extremely heavy, and he found that Zhao Qingtian's bone spirituality had been greatly damaged, and it had even weakened to the strength of ordinary magic weapons, and the amount of mana and magic power was extremely small.

The arms and leg bones on the ground before had lost their spirituality, and they were not even as good as ordinary materials, if he was not mistaken, the liquid in them was qi and blood magic.

His face was pale: "Qi and blood magic power has devoured the mature bone treasure? How can this be, even if the bones are refined, the qi and blood magic power has bone mana to confront each other, and there is no way to devour it." ”

At this time, a faint divine thought came: "Master...... The level of qi and blood magic...... Much higher than the mana of the poison wood...... Possession of toxic ...... Attack the treasure with poison...... Devour bones. ”

Lu Kun's expression was sluggish: "The energy level of qi and blood magic power is high, how can I ...... when I break through?" Could it be because of the Five Elements Chaos Mana?"

He looked at this broken skeleton again, and soon understood Zhao Qingtian's approach, this disciple was very alert, and after discovering that the qi and blood magic power was uncontrollable, he strangled his wrist, sacrificed his limbs and bones, and forced out most of the qi and blood magic power.

forcibly suppressed the remaining mana, which refined the bone treasure and generated the physical source power, but because the remaining magic power and mana in the body were very scarce, the physical source power generated was somewhat weak.

With the replenishment of life force and pure energy, a unique power gradually gushed out of Zhao Qingtian's dim bones, and layers of flesh and blood emerged from the bones one by one, gradually recovering his flesh and blood.

"One Thunder Tribulation completes the fusion of the life force of the Thunder Tribulation, and I am the Five Thunder Tribulations, which means that the body cultivation of Qingtiandu is likely to only have two or three Thunder Tribulations?"

"Bang ......" At this moment, a cave ten miles away suddenly burst open, a dark golden skeleton was quietly suspended, and the surrounding gravel was suspended under the action of an invisible force, but within the range of human bones, it was directly shocked into powder.

Lu Kun looked over and saw that this skeleton was full of spirituality, and couldn't help but breathe a sigh of relief: "Xiaoyun didn't have an accident......

Then he looked at Zhao Qingtian and said in a deep voice: "Qingtian, there are two thunder tribulations at most, you don't have to think about anything, go all out to comprehend the source force vortex I taught you, the current state, only by focusing on defense, can you have a chance." ”

With this exercise, Zhao Qingtian has already recovered his physical body, but the flesh and blood of his arms and one leg have dissipated with the bones, and there is not much demonic energy in his body, and his breath is not strong.

For physical cultivation, the bones of the body are especially important, if there is a deficiency, I think that the mana of the physical body is insufficient, plus Zhao Qingtian has fought with qi and blood magic power, and the magic energy is only less than thirty percent of Lu Kun's at that time.

Zhao Qingtian listened to Lu Kun's words, took a deep breath, sensed the physical source power in his body, and tried to operate the source force vortex, the simplest defensive technique, according to the method taught by Lu Kun before.

Huang Xiaoyun's Thunder Tribulation was also brewing, and the convergence of Heaven and Earth Yuan Qi became a little slow, causing his second Thunder Tribulation to appear before he had a certain amount of time to comprehend the operation of the source force.

It didn't take long for Zhao Qingtian to show a little dazed, looking at his body in a daze, and on his body surface, there was a vague force field wrapping.

But the range of this force field is only one foot! It is not the three feet that Lu Kun said......

In the bone transformation period, the body cultivation shows the brute force in various forms through the physical source force, forming a unique combat skill, and the key is the use of the passive source force field.

But the range of his force field is only one foot, and such a narrow range cannot superimpose the force field at all, and it is difficult to achieve even a vortex.

Lu Kun obviously also discovered this, he clenched his fists tightly, his eyes were bloodshot: "Damn, why is it a foot!"

"Boom ......"

A dark cyan thunder pillar burst down, although the size did not change much, but the destructive power inside directly reached the peak of the early stage of the Yuan Infant, and the power skyrocketed.

Lu Kun roared: "Qingtian, your physical body is weak, you can't make a hard connection, use the power of the void to cast the source force vortex!"

Zhao Qingtian's face turned blue, he stepped on the ground with one leg, trying his best to control the magic energy in his body, the physical source power was divided into passive source force field and void power, although the latter consumed amazing magic energy, but it could exert the invisible force field ten zhang away.

As Lei Zhu was about to die, the air above his head distorted slightly, and a pale cyan force field vortex appeared, barely blocking his body.

The dark cyan power of destruction and the vortex of source force competed with each other, although this was a defensive combat skill of physical cultivation, but the strength of Zhao Qingtian's physical body was far weaker than Lu Kun's, and the demonic energy in his body was even more insufficient, and his power was too far behind.

After supporting it for a few breaths, the vortex collapsed, but it also consumed a small half of the power of destruction, and the remaining thunder pillar wrapped its body.

Zhao Qingtian's flesh and blood gradually withered, revealing the faint bones inside, but under the support of the flesh and blood, the power of the Thunder Tribulation was further reduced, and when it reached the bones, only thirty percent of the power remained.

With a plop, Zhao Qingtian half-knelt on the ground, and his physical body was steadily recovering under the blessing of the pure energy fed back by the thunder tribulation and the surrounding demonic aura.

Seeing this, Lu Kun breathed a sigh of relief slightly, and he said with a solemn expression: "Qingtian, the next one should be the middle level of the Yuan Infant, the bone treasure has recovered some spirituality, and if you concentrate on defense, you should be able to get through!"

Zhao Qingtian nodded silently and quickly recovered the energy in his body.

And at this time, Huang Xiaoyun's side also lowered the first golden thunder pillar, which contained the power of the early stage of the Yuan Infant, but its bones were intact, and with the defense of the mature bone treasure, it resisted.

On the other side, Pan Yan's cave mansion also cracked, and the clouds above it slowly converged......