In the endless mountains behind the city, in a large enough secret room, Ji Fei sat cross-legged, and in front of him were hundreds of magic cores of different colors.

Ji Fei picked up a magic core and looked through it, but saw that the magic core was bright and translucent, like glass beads. However, there are impurities in it, containing a lot of innumerable dross.

This is the magic core that Ji Fei collected on this trip, and the number of them is very considerable, there are two hundred and fifty magic cores.

These monsters have different colors, which represent the different attributes of the demon core.

All things are one, all things in life.

And all things run in the five elements, implying a certain rule in the five elements.

The red core is the fire attribute, the blue one is the water attribute, the gray one is the earth attribute, the yellow one is metallic, and the green one is the wood attribute.

Ji Fei learned about these secrets from Sun Ming's jade slips.

He picked out five magic cores of different colors, yellow, green, blue, red, and gray, arranged according to the five elements of gold, wood, water, fire, and earth.

Ji Fei's divine sense slowly probed into it, and the spiritual power circulated in the demon core, and each demon core had to be carefully experienced, and the difference between them should be carefully experienced.

Five attributes, five different properties exist in these five different colored cores.

After a long time, Ji Fei, who was frowning, exhaled, feeling at a loss in his heart.

He didn't feel the difference between the five elements......

"Could it be because the demon core is not pure......" Ji Fei muttered alone.

With that, he slapped the storage bag and flew out a piece of jade slip, which recorded the information he had obtained from Sun Ming's jade slip.

Pasting the jade slip on his forehead, Ji Fei's divine sense probed in, and suddenly a large amount of information poured into his mind like flowing water.

After a moment, Ji Fei sighed, still at a loss.

"Forget it, let's purify these magic cores first. ”

Then Ji Fei opened his hand, and more than 200 demon cores on the ground floated in the void.

With a big move, a demon core was grasped in his left hand, and between the flow of spiritual power, the anti-heaven divine wood at the dantian turned around, and the colorful light circulated in the body.

In a moment, the demon core in his left hand turned into a puddle of gray-black powder.

Spreading out his left hand, the powder in Ji Fei's left hand slowly slipped down. These powders are impurities in the Demon Core, and this is the first step in purifying the Demon Core.

After that, Ji Fei used a simple internal vision technique, but he saw a red light lingering on the Heaven-Defying Divine Tree, and there was always the possibility of being absorbed by the Heaven-Defying Divine Tree.

This rich red glow is the essence contained in the demon beast core.

Seeing this, Ji Fei closed his eyes, and without saying a word, his spiritual power secretly guided the red light in his body to condense on his right hand.

In just a few moments, a pure demon core the size of a soybean appeared on his right hand.

This magic core was obtained by Ji Fei from the red wasp, and the original size of this magic core was not large, so it appeared smaller after purification.

This demon core should belong to the fire attribute, not to mention, Ji Fei's spiritual power and divine sense poured into it, and the spirit was extremely concentrated on feeling the fire attribute elements in the demon core.

At this time, his brain was blank, his mind was clear, and Ji Fei used all his strength to feel the fire element attribute in the pure demon core.

Ji Fei sat cross-legged, he didn't expect him to meditate like this until midnight......

It was an extremely long and painful process, with both inner expectations and disappointments.

At this time, Ji Fei's frowning brows finally relaxed, and a look of understanding appeared on his face.

A little red glow appeared in his mind, as small as a star in the infinite distance.

However, this little bit of red light is the nature of the fire element contained in the Pure Demon Core!

Ji Fei was overjoyed in his heart, purifying the magic core and feeling the different elemental attributes in it, which was the first step.

Sun Ming's jade slip records a secret technique, the material is the pure Five Elements Demon Core, and the premise is to feel the different Five Elements attributes in the Five Elements Demon Core.

Then Ji Fei took a deep breath and began to purify the remaining demon core.

Due to the existence of the Heavenly Divine Tree, the matter of refining the demon core may seem very simple to others, but this matter is a huge test for spiritual power and divine sense.

Putting aside the divine sense, the spiritual power alone must be controlled to an appropriate degree, if it is small, the demon beast demon core cannot be purified and clean, and if it is too big, it is too much, and the essence in the demon core is directly absorbed by the anti-heaven divine wood.

In this way, every detail of this process must be noted, and if you accidentally purify the demon core, it will turn into a waste product, or it will be swallowed by the anti-heaven divine wood at the dantian.

The spiritual power alone is so complicated, not to mention the requirements of the divine consciousness for this process. Every link and detail must be carefully explored with divine sense, if there is the slightest carelessness, it is very likely to fall short!

Therefore, Ji Fei first took out a spirit stone to absorb some spiritual power, meditated and recuperated for a period of time, and then began to purify the demon core.

Every process, every detail, has to be taken with care, so the process seems extremely slow.

Fortunately, Ji Fei's grasp of spiritual power and divine sense has already reached a high level, which is by no means comparable to before.

When the day was already bright, Ji Fei looked at the demon core in front of him that had been purified and cleaned by him with a sweaty face, and his heart was filled with incomparable joy.

In front of him were one hundred and seventy-five pure and translucent pure demon cores, of which fifty fire attribute demon cores were obtained from the red wasp.

These fifty fire-attribute cores were too small, so Ji Fei planned to sell them for some of the rest.

The remaining 125 demon cores were exactly divided into twenty-five groups, each of which was five magic cores with different attributes.

And the secret method that Ji Fei wants to cultivate is to need five magic cores with different attributes.

But seeing that Ji Fei slowly closed his eyes, the spiritual power of his whole body flowed, and five demon cores of different attributes of different colors flew out in front of him.

Seeing this, Ji Fei flicked his hand, and five demon cores flew into his hands.

Placing the five demon cores in his hand, Ji Fei's expression spread.

At the same time, his mind remembered the kind of secret technique he had seen earlier.

The essence of this secret technique is to use the magic core to refine a magic weapon, which is infinitely powerful. The five demon cores of different attributes are fused together, and the five elements are mutually reinforcing, so that the violent energy in the five demon cores is fused with each other to reach a clever balance point.

This is called mutual growth.

The five elements of mutual restraint refers to the time to resist the enemy, the balance point of the fusion of the five demon cores is broken, then the power of the five elements collides with each other, and mutual restraint will produce an extremely terrifying energy.

This is called mutual restraint.

"The journey of the avenue is also the birth of the five elements, and the obstacle of the avenue is also the restraint of the five elements......

Ji Fei silently recited the mental method in his mouth, and the spiritual power in his hand controlled the five demon cores with different attributes, and at the same time, his mind and divine sense felt the different attribute elements of the five demon cores.

However, after a stick of incense, Ji Fei's efforts were not in vain. In his mind, there seemed to be a little bit of colorful stars, yellow, green, blue, red, gray, five different colors of light slowly appeared in his mind......

At some point, a little bead of sweat appeared on Ji Fei's forehead, and a white mist formed by water vapor condensed rose from his head.

The muscles of his cheeks twitched slowly, and his brow furrowed in extreme pain.

However, what kind of mind Ji Fei has, at this time, it is the critical time to condense the energy of the five demon core elements into one, and the requirements for divine consciousness and spiritual power have reached a terrifying level.

Without saying a word, he slapped the storage bag with his other hand, and a glittering spirit stone flew out of it. He put it into the palm of his hand with a big hand, and quickly absorbed the spiritual power in the spirit stone.

The surging spiritual power in the spirit stone poured into the veins and dantian, and Ji Fei exhaled comfortably.

At the same time, with the help of this majestic spiritual power, he pressed his big hand fiercely, and the five demon cores in his hand burst out with five brilliant flashes of light.

Click, click...

Invisible cracks opened on the five demon cores at the same time, and then these cracks slowly expanded.

With a thud, five demon cores exploded, and shards fell from his hands.

At the same time, five streamers shot out with a huge amount of energy.

Ji Fei snorted coldly, "I want to run!"

But seeing his big hand stretched forward, a huge big hand phantom appeared in front of him, and the five streamers who wanted to run were fiercely imprisoned in his hand.

He twisted his hands into each other, and suddenly five streamers of light spun in his hands like a spinning top.

A gust of wind suddenly blew out from the center of Jifei for no reason......

The five elements are mutually restrictive, and it is tantamount to a fantasy to condense the energy of five different attributes together. And what Ji Fei did was to make this kind of fantasy come true!

The five streamers swirled wildly in Ji Fei's hands, and what Ji Fei did was to use the furious Liliang to condense the energy of these five different attributes to achieve a balance.

At this moment, the spiritual power in his body frantically surged to his hands along the veins of his body, but seeing that the five streamers in his hands were spinning faster and faster, Zuihou reached a point where he couldn't see clearly with the naked eye at all.

At this time, a chill rose behind Ji Fei's back, and if he felt the slightest discomfort, the rapidly circulating light in his palm would explode in an instant, releasing terrifying energy!

And the energy generated by the five elements will be devastating......

Things have come to such a point that he can't be careless!

Suddenly, at this moment, the light cluster in his hand suddenly emitted a dazzling light, and a terrifying energy poured out of it.

Ji Fei's eyes showed a look of horror, and he looked at the colorful light cluster in his hand in horror.

But then a violent thrust came out directly, pushing his body backwards fiercely.

With a bang, Ji Fei's body slammed into the hard mountain, which was full of bluestone granite, which was extremely hard.

But Rao was like this, Ji Fei's body still smashed a deep pit on it......

With a whoosh, a mouthful of blood spilled out of Ji Fei's mouth.

Whoop Woohoo ...... The furious energy condensed on the multicolored light cluster, and there was a great possibility that it would explode in the next moment.

A violent wind formed around the multicolored light cluster, whirring and blowing......