"It must be killed!"

"For the sake of the world!"

Ren Yi's mind was blank, and there was only this one thought.

He didn't care about anything, and jumped directly into the air.

Hmmm-

The heavy sword in his hand slashed out, and the sword qi soared in an instant, directly splitting the turbulent groundwater in half, revealing the rock formation, and the water waves on both sides surged.

"Ho-" The dragon raised its body, supporting its body with its thin feet, and swayed upward, completely avoiding the aftermath of the sword qi.

Ren Yi landed, drew a circle on his body, picked up the heavy sword with both hands, and slashed horizontally towards the dragon's body.

The dragon stood up again and hung half of itself on the wall.

Immediately afterwards, the huge dragon head hung down from above, and the sharp claws hung above Ren Yi, not increasing densely, desperately scratching Ren Yi's body.

Soon he was drenched in blood.

The dragon lowered its body a little longer and began to circle around Ren Yi. Constant tightening. Ren Yi's vision was completely obscured by the huge dragon body, and he only saw a circular pattern and wriggling claws.

"Ahem......" After a while, the dragon's body had completely surrounded him, and Ren Yi began to lose his breath.

Boom –

After circling around, the dragon began to roll sideways, trying to crush Ren Yi, who was completely unable to move, with his weight.

"Sunkaze!"

Ren Yi disappeared the moment his gaze came sideways.

Call!

After the dragon learned his lesson, the moment he sensed Ren Yi's disappearance, a powerful flame erupted from his mouth, instantly enveloping the entire cave!

The fire was blazing, the water was boiling, the stone walls were hot, and the entire cave was red and bright. Ren Yi had nowhere to dodge.

"Spell Mother!"

Ren Yi threw out a silver light in an instant, replacing his own life with a cut of the tail of the "Spell Worm Mother".

"No, its flames are so strong, it's so small that I can't dodge it. If I do it again, I'll be choked up!"

Ren Yi said secretly in his heart.

"This matter must be solved first, and then we must find a way to get rid of it!"

Hmmm-

Ren Yi's figure flashed, disappeared straight from the firelight, and appeared under the dragon's neck in an instant!

The "Hell Dragon King" originally felt that the victory was in his hands, but he didn't expect Ren Yi to have a backup move. Relaxed its vigilance for a while, and when Ren Yi appeared under its nose again, the blood-red single eye of the "Hell Dragon King" was only shocked!

Ren Yi riveted all his strength and shouted!

The golden light in the "Round Sky" is blazing, and the waves are rushing backwards!

Laugh at!

Ren Yi drew his sword horizontally, and a white light flashed rapidly, around the underside of the dragon's heavily wrinkled neck.

After a few seconds of blankness, blood gushed out along the neat incisions, staining the groundwater red.

After Ren Yi's blow, he disappeared immediately without lingering.

He knew he wouldn't be able to cut the neck of such a massive descender, he just wanted to pierce the eardrum underneath and make the dragon lose its ability to breathe fire!

Roar, roar......

Sure enough, the dragon writhed in pain, making strange noises in its throat, like an engine that couldn't catch fire.

The eardrum bulged a few times and immediately deflated, and the wound was leaking, and the fire could be seen inside, and then it was extinguished.

Sneer......

It was incredulous, inhaling and exhaling without any effect, and its throat kept coming out with a weird, failed airflow sound.

Determined that his abilities were completely ineffective, the Dragonlord of Hell began to panic and ramble through the small underground.

The dragon stood up and slammed its head against the rock formation at the top of the cave, roaring hoarsely, blood raining down.

All the caverns in the entire underground were shaking, and stalactites were falling rapidly.

The dragon's only remaining eye

Full of madness.

"Is it trying to crash into the ground and die with me?"

Rushing......

Suddenly, Ren Yi felt the speed of the water under his feet change.

"Oh no, there's another crack in the mountain." Ren Yiyi lowered his head, and his face changed.

"It hit so hard that it broke the mountain! If this continues, the laboratory is in danger......

The dragon was still pounding and shaking, but its throat was broken, and it was getting more out of breath and less air in, and the range of struggles was much weaker, and it became weak.

More fine gravel and sand fell, and there was a misty cloud of smoke and dust everywhere, and Ren Yi's vision was blurred.

"It's running out of strength, so it's a good time to deal with it!"

"Honkai!"

Ren Yi stood in the water, stretched out his hands, and held it in the void at the position of the dragon's head, as if he had caught the huge dragon head of the "Hell Dragon King" in the air.

Click, click. There was a tooth-sore grinding sound.

The dragon sensed danger and tried to struggle. But there was an invisible force that grabbed him, and no matter how much he writhed, he couldn't escape the palm of that giant hand.

Ren Yi held his breath and concentrated, and cold sweat gradually oozed from his forehead.

His hands tightened, and he gradually felt a tremendous force struggle under his palms.

The "Hell Dragon King" grew more and more frightened, and it felt that every bone in its neck had reached the limit of its strength and was about to collapse!

Riveting with all his strength, Ren Yi suddenly exerted his strength, and a crisp sound of bone breaking sounded!

Click!

The dragon roared, and its huge head slashed in a half-arc in the air, and it hung limply down, swinging into the water, causing a splash of water.

Ren Yi's hands did not loosen, the muscles of his arms were tense, and his hands kept twisting. As he moved, the muscles in the dragon's neck were torn apart.

Blood gushed out of the broken veins, mixing with the rushing underground springs, almost completely staining the water blood-red.

It continued to struggle, but without the connection of muscles, the neck bone could no longer support the weight of the skull.

The "Hell Dragonlord" let out a near-death roar, and with all his might, raised his head.

Caught off guard, there was a crisp sound, and it actually used the weight of its own head to break its neck!

While!

There was almost no flesh left on the huge head, and the bones of the white flowers fell into the water, taking the last bits of skin with them. The weight of the weight fell on its head, and it kept falling towards the bottom of the underground river.

It still had a shimmer of breath, but the raging spring water rushed into its throat, and a violent bubble rose on the surface of the water, and it never moved again.

Blood stained the surface of the water red.

After the neck was completely broken, the writhing amplitude of the remaining long body gradually weakened, and after a random struggle, it became stiff one after another, and let go of the stone pillar that was coiled, and fell into the water weakly, stirring up huge waves.

Section by section, its body was completely stiff. This stiffness gradually spread to the nerve endings, and tens of thousands of wriggling thin legs stopped struggling, and occasionally those who were not completely stiff twitched slightly.

"Whew...... It's finally over."

Ren Yi was exhausted, and as soon as he fell, he sat in the water, and his whole body was already soaked in sweat and blood.

After wheezing for a long time, Ren Yi finally rested and stood up from the icy river again.

The dragon's corpse lay asleep.

Ren Yi walked back to the door of the laboratory.

The door was still glowing with metallic luster, and it looked unusually mysterious, like a silent secret.

After a long time of two generations of human civilization, it finally saw another human standing in front of it again.

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