After leaving the Tongtian Temple, Li Yuan did not report directly to the inner courtyard, but first went to the retreat area and rented an ashram.

After entering the inner courtyard, he should face a lot of battles.

Take advantage of the fact that there is nothing else to do now, refine the demon heart first, improve your strength, and it will be easier to fight when the time comes.

Renting an ashram in the retreat area costs spirit stones, starting at a minimum of seven days at a time. Depending on the type of quiet room, the price point varies.

Li Yuan directly chose a high-level quiet room with the best closure and the strongest spirit gathering array, handed over three hundred spirit stones, and entered it.

There is a space of about three zhang square inside the advanced meditation room, and a fine spirit gathering magic circle is carved on the ground, and some high-quality spirit stones are inlaid at the base of the array, which is used to guide the gathering of heaven and earth spiritual energy.

As soon as he entered the quiet room, Li Yuan felt that the aura around him was more than three times stronger.

It's just a pity that it's useless for him.

All he needed was the isolation effect of the quiet room to prevent the demonic heart aura from leaking and being detected by the powerhouses of the academy.

After closing the stone door, Li Yuan sat down cross-legged on the futon in the center of the quiet room, and took out the jade treasure chest obtained from last night's auction from the small cosmic space.

"Fifty thousand spirit stones only took a picture, don't let me down......"

Li Yuan opened the box, looked at the huge heart lying in the box, still pounding, and muttered in a low voice.

This demon heart is dark red in color, exuding bursts of demonic blood, and it is a few points larger than a human head, and the ventricles are constantly agitating and contracting, spitting out a breath of life with evil breath.

"The life force of demons is terrifying. ”

Although it has been dead for a long time, it is as if it is still alive, and the strength of its beating is so strong that many practitioners cannot compare.

The method of refining the demon's heart is very simple, you only need to directly extract the life essence in the demon's heart, inhale it into your body, and use it for your own use.

However, this seemingly simple process also carries great risks.

Because the demonic evil qi contained in this heart is very heavy, if you are not careful, you may even be devoured by the evil qi halfway through refining, and become a madman who only knows how to kill.

After adjusting his state slightly, Li Yuan began refining.

He held the demon heart in both hands, mobilized the original energy in his body, and probed into the demon heart.

Under the perception of his mind, he clearly "saw" that his original energy had entered a world full of crimson energy bodies.

Those crimson energies were so active that compared to them, his genetic instincts were like a herd of tame sheep.

"This is the life essence of the demon, so strong. Li Yuan exclaimed in his heart.

The demon has more life essence in his heart than he can surpass himself.

And this is just the heart of the demon cultivator of the Xuantong Realm.

Feeling the power of the strong man again, Li Yuan controlled the genetic origin energy, approached a wisp of life essence, and attracted it.

Airplanes~

With the contact of the Primal Energy, the Life Essence immediately became agitated, and it actually faced the Primordial Energy and traced it back to him!

"Allah ......"

"But I like it!"

The first life essence followed the original energy to find his source, burrowed into his body from the palm of his hand, and surged around along the meridians.

Li Yuan didn't dare to be careless, and hurriedly slowed down the attraction of life essence, wanting to try to refine a part of it first.

But the demon heart is not something he can refine if he wants to refine it, and let it go if he wants.

As soon as he tried to retract his original energy, an even greater life essence rushed towards him like a shark smelling fish.

Crimson energy poured wildly from his hands, and the energy in the entire demon's heart seemed to have found an outlet, scrambling to drill into his body.

Suddenly, Li Yuan only felt that the muscles of his arms were swollen, and the meridians and blood vessels were stretched to the limit, almost cracking.

He guarded his mind, suppressed it with his genetic instinct, and guided the life essence to move in the body in a regular manner, preventing the essence from retrograde and causing internal injuries.

Li Yuan's physique is very strong, and although these external forces have brought him a lot of pressure, fortunately, they have not yet reached the level that can support him.

As the time spent in his body increased, the life essence was gradually decomposed and assimilated by the genetic energy, and was integrated into his body bit by bit.

However, at this time, the evil qi hidden in the essence of life also came out, and wisps of tiny black aura rampaged, and the genetic energy could not be stopped at all.

The black evil qi directly invaded Li Yuan's mind.

With the entry of the black qi, in Li Yuan's consciousness world, there was immediately an incomparably huge and violent giant ape.

"Such a weak human wants to devour my power?"

The giant ape spat out human words and roared loudly, bringing up a burst of overwhelming ferocity in an attempt to invade Li Yuan's will.

Li Yuan has been prepared for all this!

While controlling the original energy to refine the life essence, he condensed the killing qi with his mind to compete with the black evil qi.

Before being killed by Yang Yan Zhenren, the giant ape demon was the demon lord of the famous town of Tianxia County, occupying a large area of mountains and rivers, and there were countless big demons and small demons under his command, and he didn't know how many killings he had done in his life.

His evil aura is condensed into substance, if not all, just the heart contains, it is already very terrifying.

But Li Yuan is not a vegetarian either!

He has been fighting with the army for more than ten years, jumped in the galaxy of the universe many times, and experienced dozens of battles, large and small.

There were also many alien lives that died at his hands.

Strong will and unshakable faith are essential qualities for an extraordinary warrior.

Each of them has been tested by their wills to prevent them from being controlled by alien spirits and becoming pawns.

Although the evil aura of the giant ape demon is powerful, in Li Yuan's opinion, it is not enough to form a threat!

In the sea of knowledge, the evil qi and the will could not be controlled, and the berserk giant ape continued to make earth-shattering sounds, wanting to destroy his faith.

And Li Yuan was as steady as a rock, unmoved.

In his body, the life essence was refined more and more, and the irascible life essence was gradually tamed by the original energy and turned into a river of energy, which operated and digested in his body.

Week after week.

Every week that runs in the meridians, the life essence shrinks by one point. His body will also grow a little stronger.

Li Yuan felt that the power contained in his body was getting stronger and stronger, and his cultivation, which had just broken through the realm, began to grow at a speed that could be argued with the naked eye.

It was a pleasant surprise.

"The Demon Heart can only improve longevity and physical fitness for ordinary monks, but for those who specialize in the physical body, it still has the effect of improving cultivation!"

Although this level of improvement was not worth mentioning compared to the price of "50,000 Spirit Stones", it was already worth several months of his cultivation