After returning to Zuiyun Xuan, Lin Feng once again locked himself in the cultivation room. Sitting cross-legged on the futon, he took out the three magic lamps that held the four-rank flames from the spatial ring.

According to the record in the "Medicine God Treasure Book", Lin Feng first opened a magic lamp with a four-grade pure flame, wrapped this four-grade flame with his divine sense and put it into the sea of knowledge.

As soon as the four-grade flame was put into the sea of knowledge, the origin fire that already existed in the sea of knowledge, and the origin fire with its own origin heart was entangled with the four-grade flame, and they fought desperately.

Although the flame of the fourth grade is relatively high-grade, if it does not have the heart of origin, it is equivalent to a person who has no soul and will not take the initiative to devour it.

And Lin Feng's wisp of Origin Flame with Origin Heart was like seeing something of great replenishment, devouring that four-grade flame with all its might.

It's like a newborn baby attacking a strong adult warrior, and the scene is particularly comical.

Although the strength of the adult warrior is strong, he has no thoughts, and is bitten and devoured by this thinking baby, but he is helpless, but he instinctively does not want to be devoured, and makes some resistance.

Lin Feng had an idea, and decided to help his shrunken Origin Fire, after all, the level gap was still very large.

Moreover, this Origin Fire is also a flame that Lin Feng will often use in the future, and it is really a bit unreasonable not to help him.

The divine consciousness turned into a sharp sword, constantly shuttling in the sea of consciousness, dividing the four-grade flame one by one, and the other side used the divine consciousness to control its own origin fire and desperately devoured it.

Although the grade of the origin is relatively low, it is better to have the heart of the origin, the degree of cohesion is high, and with Lin Feng's help, it is not to be outdone.

With the passage of time, the power of the pure four-grade flame became weaker and weaker, but his own origin fire became more and more powerful, and with the strength of the origin fire, the devouring speed became faster and faster, according to this situation, it didn't take long to completely swallow this flame.

The space in the sea of knowledge trembled slightly, and the Origin Fire finally swallowed the pure flame of the four grades, forming a new Origin Fire.

With a movement in his heart, Lin Feng summoned the brand-new Origin Fire and put it in the palm of his hand to look at it carefully.

The golden flame floated in the palm of his hand, the flame was much larger than before, about half the size of a palm, and there was a bright spot the size of a mung bean in the center of the flame, which was the origin heart of the origin fire, in the process of devouring, not only strengthened the size of the flame, but also strengthened the origin heart.

Today's Origin Fire is a real four-grade Origin Fire, although that Origin Heart is small and pitiful, but Lin Feng is still very satisfied, he didn't expect that this Devouring Flame can also strengthen the Origin Heart, this is indeed a great gain.

Everything is difficult at the beginning, with this four-grade origin fire with the heart of the origin, it finally has a foundation, and I am not afraid that it will not grow.

Lin Feng withdrew it into the Sea of Knowledge, turned on another magic lamp containing the Four-Rank Pure Flame, and wrapped the flame with his divine sense and put it into the Sea of Knowledge.

These two flames are both four-grade flames, although the origin fire is smaller, but with the experience of devouring and the foundation of devouring, and the heart of the origin, as soon as the four-grade pure flame enters the sea of knowledge, the origin fire will be entangled with it.

With the experience of the last time, Lin Feng still used his divine sense to turn into a sharp sword, cutting this flame, and the origin fire was frantically devouring the wisps of flame cut out.

As time passed, the devouring speed of the Origin Fire was much faster than before, and the pure flame shrank little by little, and the Origin Fire became stronger and stronger, but the devouring speed was even faster.

After a while, the flame was swallowed up, and the entire Origin Fire doubled in size, the size of a palm, and the mung bean-sized Origin Heart in the center of the flame also increased to the size of a peanut.

After this devouring is completed, the Origin Fire is equivalent to the previous four-rank flame with the Origin Heart, which is much stronger than the previous four-grade flame.

Put the Origin Fire in your hand again, and look at the flame in your hand carefully, the golden flame is more dazzling, the volume has become larger, the light is more victorious, and the Origin is stronger.

Withdraw the Origin Fire into the Sea of Knowledge, and the flames continue to beat in the Sea of Knowledge.

Lin Feng turned on the third magic lamp that contained the four-grade flame with the heart of the origin, and once again wrapped this flame with his divine sense and put it into the sea of knowledge.

This time was different from the previous two times, after all, it was a flame with the heart of the origin, and as soon as this flame entered the sea of knowledge, it devoured each other with the fire of its own origin.

The strength of these two flames was about the same, Lin Feng's own Origin Fire didn't take much advantage, it could only be on par with it, and it was not easy for anyone to devour the other party.

Seeing this situation, Lin Feng was also a little surprised. In the same way as before, he once again used his divine consciousness to turn into a sharp sword to cut the flames, scattering and devouring them.

But this time, as soon as the cutting was completed and began to devour, the other flames merged back into the flame, and his own Origin Fire only swallowed a small wisp of flame.

This result made Lin Feng very disappointed, and he didn't care about the battle between the two flames, and fell into deep thought.

Suddenly, with a flash of inspiration, Lin Feng thought that he could use his divine sense to wrap the flames and divide the flames, so why not wrap the flames while splitting the flames, so that the divided flames would not be able to merge with the flames.

Thinking of this, Lin Feng operated in this way, first wrapping this flame with his divine sense, only one gap flowed out, and then using his divine sense to turn into a larger sharp sword, cutting at the flame, and the other side hurriedly wrapped the flame completely.

Sure enough, this time it didn't merge again, and this wisp of flame was quickly swallowed up by its own origin fire.

It seemed that this method could be used, and in this way, Lin Feng divided the four-grade origin flame little by little, and his own origin fire was also constantly devouring.

It's slow, but it's the safest way, otherwise it's hard to completely consume the flames in a short period of time.

It took a whole half a day to gradually eat away most of the flames, which made Lin Feng's Origin Flame particularly dazzling, and its volume was much larger than before, but that four-grade Origin Flame was only left with the Origin Heart not being devoured.

Lin Feng looked at the remaining group of Origin Hearts, no longer slowly encroaching like this, his Divine Sense let go of the wrapped Origin Hearts.

His own Origin Heart was devoured whole, and that Origin Heart was a little bigger than Lin Feng's Origin Heart, constantly resisting, not wanting to be devoured.

However, his own flames had been eaten away, and he had no ability to resist, and after a while, he was completely devoured by Lin Feng's Origin Fire.

The space in the sea of knowledge shook greatly, and a flame the size of a bowl floated in the sea of knowledge, looking at this flame Lin Feng smiled happily.

Summoning this ball of Origin Fire, floating on the palm of his hand, looking at this ball of golden light that was the size of a bowl, Lin Feng smiled happily, especially the Heart of Origin, which had increased to the size of a pigeon's egg.

Although the volume of the flame did not increase much this time, it was only the size of a bowl, but this Origin Heart had increased several times.

The whole flame looked particularly dazzling, and after looking at it for a while, Lin Feng guessed that this was no longer a fourth-grade flame, this was definitely a fifth-grade flame.

Three four-grade flames, plus two Origin Hearts, finally created a five-grade Origin Fire that always has Origin Hearts.

Lin Feng's purpose was achieved, the Origin Fire of the Five Grades could already be used in battle, and the most important thing was that the Five Rank Flames could completely refine any elixir, and the excitement could not be suppressed, and he laughed.