"This kilogram of 10,000 Year Stalactite Milk should be enough to allow the Primordial Godly Tree to produce its own Chaotic Force, right?"

After returning to the high grade training room, Ye Zichen immediately took out the Ten Thousand Year Stone Milk that he had exchanged from Forest Thunder.

Although directly consuming the 10,000 Year Stalactite Milk would have a limited effect on his cultivation, according to his previous experience, the 10,000 Year Stalactite Milk was able to speed up the growth of the Chaotic Force from the Primal Chaos Wood. This was also the real reason why Ye Chongleng was selling the 10,000 Year Stalactite Milk.

Sensing that the powerful magic power contained within the demon heart crystals was of great benefit to him, Concealed Thunder revealed a sinister smile. He had no doubt that if he were to refine these two demon heart crystals, his demonic art would be raised to a whole new level, and his own realm would also be raised to the peak of the first class beast king level.

"Chi!"

Time was limited. Sen Lei did not waste any time. He took out a sharp dagger and cut open his own chest, directly pressing a Demon Heart Crystal into his body.

After being contaminated by Forest Boa Lei's blood, the Demon Heart Crystal immediately released a boundless amount of magic power. The surging magic power was like a wild horse that had broken free of its restraints, rushing into his body and scurrying around.

"Yama Minamiya, refine!"

The reason why Sen Lei dared to directly absorb the Demon Heart Crystal into his body was because he relied on the Dark Asura Hall's inherited soul art.

He believed that with the supreme divine might of the Yama Minamiya, he could completely restrain the Demon Heart Crystal and refine it, converting it into energy and merging it into his body.

Yama Minamiya circulated his martial art at high speed, and a black whirlpool appeared in his body, crazily devouring the devilish energy released by the Demon Heart Crystal.

Seeing that the Demon Heart Crystal had been restrained by the Yama Incantation, suddenly, a terrifying demonic energy surged out of the Demon Heart Crystal, instantly condensing into a ferocious demon face and directly attacking at Sen Lei's soul.

Caught off guard, Sen Lei's soul was damaged and his head felt as if it was about to split open. The pain was unbearable.

"Break for me!"

His soul continued to be attacked by the demonic face, but Sen Lei was still able to endure the pain. He continued to use his soul power to attack.

At this moment, the devilish energy released by the Demon Heart Crystal broke through the devouring process of the Hades' Art and madly surged through his body, destroying all the meridians and flesh of his body.

"Damn, how could this be?"

Sen Lei never dreamt that refining the demon heart crystal would be so dangerous. For a time, both his soul and body were injured.

He had no choice but to quickly take out the demon heart crystal that had fused with his body, and use all his strength to resist the devil face that was gathering the demon heart crystal.

When he forcefully eliminated the demon energy contained in the demon heart crystal and dispersed the hideous demon face, a day had already passed. Not only did he not improve his strength, his body was also severely injured by the demon heart crystal.

This caused him to be so mad that he vomited blood, causing his hatred for Ye Chenfeng to grow even stronger.

There was an accident when the Forest Thunder was refining the Demon Heart Crystal. The Primal Chaos Wood in Ye Zichen's body had absorbed a jin of the 10,000 Year Spirit Milk, but it was able to produce a wisp of Chaotic Force as thin as a cow's hair.

"Phew, I finally succeeded."

After the Primal Chaos Wood successfully gave birth to the Chaotic Force, Ye Chenfeng revealed a faint smile. With this strand of Chaotic Force, Ye Zichen was completely confident that he would be able to kill Forest Lightning at the critical moment.

"There's still one day left. It should be enough time for me to refine this Jade Marrow Stone."

In order to further increase his strength, Ye Chen took out the Jade Marrow Stone he got from Forest Thunder and used the Soul Devouring Secret Art to devour the power of the Jade Marrow, tempering his bone marrow.

"Mm. As expected, Sen Lei did something to this Jade Marrow Stone."

While Ye Zichen circulated the Soul Devouring Secret Art to refine the Jade Marrow Stone, his sensitive soul perception detected a strand of deadly poison from the Jade Marrow Stone.

If an ordinary person were to accidentally be poisoned by this poison into their marrow, their life would be in danger.

However, Ye Chenfeng, who possessed the Primal Chaos Wood, was not afraid of the poison corroding his body. When the poison hidden within the Essence Stone entered his body, he immediately controlled the Primal Chaos Wood to absorb it without causing any harm to his body.

After breaking Sen Lei's hidden hand, Ye Zichen relaxed his heart, then quickly absorbed the Jade Marrow Stone to refine his bone marrow.

When a large amount of the Jade Marrow energy entered his bone marrow, Ye Zichen immediately felt like he had been stabbed by thousands of silver needles. An enormous pain spread throughout his entire body.

Large amounts of black blood flowed out from his pores, turning him into a bloody man.

The impurities in his bone marrow were continuously expelled, and the marrow that was fused with the power of the Jade Marrow began to form new blood. Once Ye Chenfeng's entire bone marrow completed the Blood Transformation, he would be able to cultivate to the Great Perfection Stage.

However, Tempering Marrow was the last realm of six meridians of Divine Obstruction and also the hardest realm. The energy required was greater than the sum of the first five stages. A single Jade Marrow Stone could at most cultivate to the Initial Stage.

Time passed second by second. Ye Chenfeng relied on his incomparably strong willpower to endure the pain of tempering his marrows, circulating his six meridians' divine qi to refine his marrows.

"Dark golden threads, my bone marrow has finally turned color."

A person's bone marrow was dark red, but after Tempering Marrow, the color of the bone marrow would turn dark gold. Ye Chenfeng, who was enduring the pain, finally smiled as he felt his bone marrow begin to change color.

"The Jade Marrow Stone still has half of its energy remaining. It should be able to help me cultivate to the Bone Refining stage to twenty percent."

Ye Chenfeng took a deep breath and continued to endure the pain of the Tempering Marrow. He quickly devoured the power of the Jade Marrow stone and continued to refine the bone marrow.

Finally, at daybreak, the Jade Marrow Stone in Ye Chenfeng's hand shattered. All of the power contained within it was devoured by Ye Chenfeng's body and refined into his bone marrow.

After refining a Jade Marrow Stone, Ye Zichen cultivated the Marrow refining realm to twenty percent of his original strength. His physical body alone reached 900,000 pounds, and with the added boost from his physical body, his physical strength reached an astonishing 1,000,000 pounds, which was comparable to a fourth level Heavenly Beast.

"It's time to go to the arena."

Ye Zichen looked out the window at the dim light, then took a shower in his room. Then, he washed off the blood and put on a clean set of clothes before heading to the martial arena.

During the past two days of Ye Chenfeng's closed door cultivation, news of his duel with Sen Lei, which was on the peak of the fifth floor of the Tower of Slaughter, spread. Many people even placed their bets on the results of the competition.

Although Ye Chenfeng's reputation for killing Lionfire was great, and he had won a bounty of 300,000 slaughter points, everyone knew that Sen Lei was the absolute king of the fourth floor of the Tower of Slaughter. His terror had penetrated deep into the hearts of the warriors of the fourth floor.

Therefore, almost no one thought too highly of Ye Chenfeng. From their point of view, for Ye Chenfeng to challenge Forest Lightning on the fourth floor was undoubtedly courting death.