But he still underestimated Xu Haifei and Xu Haihai a little, these two teenagers who didn't seem to be good at fighting at all reflected the moment he just made a move, and then, the flames in the corridor began to spread.

Forced to helplessly, Yan Zhengfeng could only give up the attack, the surrounding metal walls began to melt, and the flames pounced on the black mist to cause a series of burning sounds, and at the same time, the ground began to be covered with a layer of green water, the green water was strongly corrosive, and people could feel a tingling just by stepping on it.

The field of vision is covered by flames, making it difficult to see anything.

But Zhao Yi's screams came from behind him, which made Yan Zhengfeng very anxious, but in such a battle, he didn't care to look back, the black mist surrounded his body, changing into various shapes as if it was alive, and in the confrontation with the scorching white flames, he had a slight upper hand.

He didn't know what the situation was on Zhao Yi's side, a thin layer of ice was formed on the corrosive green water area on the ground, but the thin ice didn't last long before it was broken and had no effect.

This is not good news, with Zhao Yi's current weak state, he can't resist such an attack at all.

The black mist surged wildly, extinguishing cluster after cluster of flames, although it was one against two, but Yan Zhengfeng did not feel the slightest difficulty, but still had the upper hand in this battle of abilities, but even so, he could not completely break free from the shackles of flames and green water.

Zhao Yi's voice no longer came, which made Yan Zhengfeng panic, and he tried his best to push away the flames, wanting to rush to Zhao Yi's side quickly.

Finally, after spending a few minutes of hard work, Yan Zhengfeng was covered in blood and rushed out of the sea of fire, but he was indeed stunned when he saw the sea of fire.

Outside of the area where he had been engaged with the subject, the flames burned here, but not as hot as elsewhere.

Zhao Yi and Li Ying's bodies were lying on the ground, and several figures stood around them, all of the test subjects, including Dr. R, standing there, holding long knives in their hands, the blades of which were stained with blood.

Crystalline ice cubes were scattered all over the ground, some with blood stains, some white, and these ice cubes gradually melted.

"Zhao Yi?"

Yan Zhengfeng tentatively spoke, looking at the cold body on the ground, his face full of disbelief.

But what responded to him was the raging flames behind him and Dr. R's indifferent face.

The violent impact came from his back, Yan Zhengfeng's steps staggered a little, and a piercing blood stain flowed from the corner of his mouth, but he didn't seem to care about his injuries, and his eyes still looked at Zhao Yi's body lying on the ground without blinking.

Dr. R walked towards him, along with a group of test subjects, who walked up to Yan Zhengfeng and raised their knives.

The world in front of me seemed to be covered in blood, and in an instant it turned blood red.

……

……

Under Lu Ming's guidance, Yan Zhengfeng gathered the energy in the palm of his hand, and gradually began to condense into a regular round ball, and a somewhat strange mouth appeared from the palm of his hand, spitting out black energy.

A round of black balls began to appear from the palm of his hand, and seven lifelike dragon heads poked out of the ball, roaring fiercely.

At the same time, a strong sense of weakness was conveyed from Yan Zhengfeng's body, and a large amount of life force was extracted, making his eyes more and more sluggish, and his originally plump skin gradually began to dry up.

"You're going to die."

"I don't care."

The black ball left the palm of his hand, and gradually evolved into a huge black sun, the huge volume made the building of the institute collapse, Yan Zhengfeng stood directly below this round of black sun, although his demeanor looked extremely weak, but he was like a god.

Everyone couldn't take any action under the suppression of this round of black sun, including Xu Haifei and Xu Haihai, who were also standing under the black sun with impressive eyes at this time, looking up.

Seven hideous dragon heads struggled in the black sun, the dragon heads pointed downward, and the huge dragon eyes stared at the test subjects on the ground like ants, if you looked closely, you could find that each dragon had different emotions in its eyes.

Arrogance, jealousy, rage, laziness, greed, hunger, and...... Desire.

The black sun continued to shake, and a large amount of black mist gathered from behind the dragon head that gradually broke free, condensing into seven swords of different shapes, Yan Zhengfeng's face was indifferent, he reached out to hold one of them, and slowly inserted it into the ground under his feet.

The dragon's head wrestled in his hand, letting out an earth-shattering roar, but it could not break free no matter what, and as the hilt of the sword was inserted into the ground, the dragon's head stopped struggling and solidified into a lifelike sculpture.

The sculpture maintained a roaring posture, as if telling its unwillingness, and the coercive pressure began to spread, causing the test subjects not far away to sink their bodies, and they could no longer even stand, and fell directly to the ground.

Yan Zhengfeng's face was expressionless, and he stretched out his hand and pulled out the other one from the black sun, compared to before, the second fierce dragon struggled more violently, but Yan Zhengfeng was still unmoved, and inserted this strange-shaped weapon into the earth.

In an instant, the coercion became even thicker, and if you listened carefully, you could even hear a clear sound of bones shattering...... Maybe it's not just the bones that are shattered.

At this time, Yan Zhengfeng's body had begun to crumble, his movements were getting slower and slower, but the hand holding the sword did not tremble at all, it was still slow and firm, and he inserted the weapon into the earth.

The third ...... Fourth...... Seventh.

Every time he inserts it, the vitality in his body will pass quickly, and when he inserts it into the seventh hand, he is already gray, and his body is extremely old, and he can no longer see the original appearance.

With all the weapons inserted into the ground, the seven dragon head sculptures stood on the ground, forming an inexplicable formation, Yan Zhengfeng stood in the center, his hands were lowered, the originally active black fog on his body gradually faded, and the black sun above his head also disappeared with the completion of the seven sculptures.

A flash of light began to spread from the center of the formation, and it was not dazzling, but at this moment, apart from this bright light, heaven and earth seemed to have lost all color and sound.

Wherever the light passed, all the items began to melt, and there was not even dust left, and the huge underground space was empty in an instant...... It was the kind of emptiness in the true sense, and the space where the original research was located turned into nothingness at this time.

The only thing left was an old corpse standing in the center, and seven hideous dragon head sculptures around it.