The Extreme Flame Beast rolled its eyes and scanned around the cave passage, judging from its eyes, it had already sensed the existence of the fire formation, but it did not have the slightest fear.

"Roar"

It first raised its head and roared, as if demonstrating, its huge copper bell-like eyes stared at Wu Wei for a while without blinking, as if it also showed a look of contempt, and soon it leisurely stepped into the fire formation.

The Extreme Flame Beast sniffed around it, and then its body swung suddenly, swinging its long fins like divine whips on its abdomen and sweeping towards the fire formation.

"Bang"

The fire formation suddenly swayed under this powerful bombardment, and it looked like it was already crumbling, and a big hole was instantly broken out of the spiritual power light mask, and it was obvious that the pressure resistance of this attack formation was far from enough for this extremely flame beast's understatement.

However, the size of the Extreme Flame Beast was extremely large, just a hole was not enough for it to get rid of completely, and although the strength of the formation was not enough, the power of its binding rules was still there.

"I want to see how strong the so-called Jiedan Realm is..."Wu Wu's eyes flashed with cold light, his figure quickly took a step back, and in a flash of thought, he quickly attracted spiritual power to merge into the black short sword, and the black short sword suddenly became blue.

"Go"

With a loud shout, the blue light short sword suddenly turned into a divine light and stabbed towards the Extreme Flame Beast, since he stepped into the foundation building realm, the devouring aura emitted by the black short sword was far stronger than before.

"Ding"

The Extreme Flame Beast did not shy away, and the blue light short sword stabbed at its scale armor in an instant, making a sharp and piercing impact sound, and suddenly the fire was shining, but the short sword was as if it was pierced on the iron wall of the copper wall.

The Extreme Flame Beast was unharmed at all, but the glittering blue light emitted by the black short sword blade was dimmed, and it flew back with a 'buzz' as if it had been hit hard.

"This..."Wu Wei looked at this scene, and suddenly felt his mouth dry, he hurriedly withdrew the black short sword, glanced at it and found that there was a trace of crack in the sword body, the black short sword was originally with him, and he could feel the breath of the black short sword for a while.

The Extreme Flame Beast in the formation was also surging with anger from this thorn, and it stared at Wu Wei not far away with angry eyes, and its mountain-like body shook a few times again, as if it was condensing its divine power.

"Bang"

I saw that the huge body of the Extreme Flame Beast suddenly hit the fire formation again, this blow almost condensed its full strength, and the already crumbling formation almost collapsed completely under this bang, and a powerful aura of the power of the Dan swept towards Wu Wei.

"What a powerful brute..."

Wu Wu's face was gloomy, his body quickly retreated a few feet, and quickly attracted a cloud of spiritual power to protect him in front of him, and before he could officially fight, the fierce beast aura of this Jiedan realm was suppressed like a mountain, so that he was almost out of breath.

However, he did not give up his resistance, but quickly thought of a solution. The Extreme Flame Beast was breaking through the last gap in the formation at this time, and the blue light short sword had no effect on it, and the suppression of the realm made the flesh of this fierce beast extremely strong, and ordinary magic weapons had no effect on it at all.

"The more powerful the enemy, the more fragile its lifeline..."Suddenly, the old man of the Yin Spirit in the cloth bag said faintly: "Boy, its eyes are its lifeline..."

Wu Weiyan's eyes suddenly lit up when he heard this, but a trace of hesitation suddenly flashed in his heart: "Is this dead old man's words reliable..."

However, at this time, he couldn't afford to think too much, and in a flash of thought, he once again attracted spiritual power to pour into the black short sword, and the black short sword, which had been dim, lit up again, but he could clearly feel that its power was much lower than before.

It's a long story, but the action is done almost instantaneously...

"Roar"

Soon, the Extreme Flame Beast broke through the last gap in the fire formation, only to see it open its bloody mouth, writhing its huge body with anger and murderous aura.

"Drink"

Wu Wu's mind was full of thoughts, and his body jumped forward quickly, and his whole body flipped and moved in the air for a while, making a gorgeous move to meet him head-on.

The Extreme Flame Beast was already a little impatient in the fire formation, and when he saw the human in front of him with a low realm, he actually met it head-on with his bare hands, and he didn't realize that his heart was full of anger.

Almost at the moment when he jumped out quickly, Xinnian controlled the black short sword to turn into a flash of blue light and turned to the side of the Extreme Flame Beast, aiming at its eyes with a 'whoosh'.

The Flame Beast's eyes were full of contempt, and it ignored the danger at its side for a moment, but by the time it realized it, the black dagger had already pierced its left eye.

"Zi"

When the black short sword was inserted, it was like a scorching molten slurry sinking into the water, making a chilling and piercing sound, and suddenly a smell of burnt meat came to the face.

"Roar"

The Extreme Flame Beast let out a terrible roar in extreme pain under this stab, and its mountain-like body shook suddenly, shaking the entire ground violently, like an earthquake.

After suffering a heavy blow, the Extreme Flame Beast suddenly fell into unprecedented madness, and a world-destroying aura of the Flame Beast spread violently in this cave passage.

The surrounding rock walls, which were as smooth as copper walls, were actually scratched by the sharp claws of the Extreme Flame Beast, and at the same time, the gaps were bubbling outwards with a golden liquid like blood and pulp.

"Boom"

Just as the rock wall was broken, the entire underground space suddenly shook violently again, and suddenly the heavens and the earth turned upside down, and a breath that made people tremble swept from the cave passages in all directions.

"What the hell is going on above this cave?" Wu Wei was amazed in his heart, this huge power had appeared several times in the depths of the earth, and this time it seemed to be even stronger.

At this time, the Extreme Flame Beast was also spinning in the same huge force, and its huge body was churning in this small space, completely out of its control.

Wu Wu's body was much smaller than that of the Extreme Flame Beast, he quickly recovered from the shock, quickly stabilized his body, and while the Extreme Flame Beast had not yet recovered from the roll, he needed to cut off the dangerous existence in front of him as soon as possible.

"It's now..."

He held the black short sword in his hand and suddenly attacked, and with a quick leap, he stabbed at the right eye of the Extreme Flame Beast three zhang away, this stab almost contained the spiritual power of his whole body, and in the blink of an eye, the short sword was only three feet away from its giant eye.

Although the Extreme Flame Beast's body rolled in violent vibrations, the power of its Jiedan realm was not in vain, its eyes suddenly flashed, and its long sword-like fins rose and slammed towards the oncoming Wu Wu.

"Drink"

Wu Wei was only one foot away from the Extreme Flame Beast at this moment, and seeing that he was about to succeed, he immediately gritted his teeth, took out a hand and quickly condensed a spiritual power light cluster to meet it with his bare hands.

Almost at the same time, the black short sword on his right hand stabbed into the right eye of the Extreme Flame Beast with lightning speed, all of which happened in an instant.

"Roar"

The Extreme Flame Beast let out a terrible roar again, and at the same time, its long fin also pierced into the body of the oncoming Wu Wei, and the long fin shook and threw away several meters away.

Wu Wu's entire body was like a kite with a broken string, and it fell to the ground with a bang, his whole body was pierced by the long fins like sharp blades, blood gushed out of his body, and the black short sword also flew back like a flag and landed beside him.