Even after just a dozen breaths, Xiao Yan felt that his Dou Qi was almost exhausted.

The consumption brought by the Lihuo Formation to suppress the demon dragon was unprecedentedly huge. Xiao Yan even vaguely felt that his fingertips were becoming slightly tingling and numb because of the rapid extraction of Dou Qi by the Lihuo Formation.

A trace of cold sweat slid down Xiao Yan's forehead. Xiao Yan took a deep breath and struggled to maintain the Lihuo Formation that restrained the demon dragon.

But even so, this consumption was particularly terrifying for Xiao Yan.

He hurriedly poured all the pills in the jade bottle in his hand into his mouth and ate countless of them.

The huge Dou Qi rushed wildly in the meridians. If Xiao Yan's body was not strong enough now, the feeling of this huge amount of Dou Qi rushing wildly in the body would probably be unbearable even for the Dou Sheng.

After swallowing countless pills to restore Dou Qi, Xiao Yan finally maintained the terrifying consumption brought by the Lihuo Formation at this moment.

At the same time, the buzzing sound of a sharp sword being unsheathed echoed behind him.

Xiao Yan couldn't help but breathe a sigh of relief, but the Dou Qi in his body was still rapidly dissipating at a very alarming speed.

As Xiao Yan's Dou Qi ran out, the seal of the Lihuo Formation was no longer so tight for the demon dragon. In the boiling sea of ​​fire, the giant three-headed demon dragon, which was thousands of feet long, swung its tail fiercely, and it knocked out hideous and conspicuous cracks around the formation.

"It's like a gnat trying to shake a tree, you don't know your own strength!"

The North Dragon King let out a deafening sneer. Although all the scales on his body were burned into a piece of charred and smelly rotten meat by Xiao Yan's Lihuo Formation, for the current North Dragon King, it was just a superficial injury.

"Your chains are not even as important as hair to me, and the flames are just a little bit of smoke and dust. How dare you challenge me?"

The demon dragon laughed at Xiao Yan's weakness. As the sharp claws were constantly torn apart, they slowly stretched out. Almost as soon as the North Dragon King made a slight move, the Lihuo Formation began to fall apart a little, until finally, it completely collapsed.

Xiao Yan saw the crazy sneer of the three demon dragons in front of him. Before he made any move, he heard the sound of the sword being unsheathed, which made Xiao Yan stunned.

"Leave it to me next."

Accompanied by Zi Yan's soft whisper, a dazzling sword light tilted down and flashed in front of the two.

A long and neat purple hair danced in the wind, just like the three thousand flames that Xiao Yan had seen in the star field space.

A trace of confusion could not help but be reflected in Xiao Yan's dark red eyes. Speaking of which, when he subdued the Three Thousand Flames, she had to help him.

Xiao Yan suddenly felt a trace of heat in his chest, as if something that had been dormant for a long time was awakened. The inexplicable emotion spread in Xiao Yan's heart like a flame, almost drowning him.

The person who walked slowly was naturally Zi Yan. On her graceful and slender body, she was stirring up a terrifying pressure that made the ancient dragon clan almost unable to resist. From her palm, a three-foot-three-inch long sword made of golden liquid flowed with a liquid-like luster.

The sword light flashed by.

The three-headed demon dragon suddenly showed a trace of surprise, and when it reacted, its claws that could not be burned and destroyed by the strange fire were all cut off in a row under the golden sword light.

Its cross-section was as smooth as a mirror.

The three-headed demon dragon was stunned when he looked at his claws that were completely cut off by a sword. After swallowing the Western Dragon King and the Southern Dragon King, he naturally gained not only an improvement in cultivation, but also extremely terrifying physical strength, not to mention that his dragon claws are almost the hardest part of his body now, which is not much less than the dragon bones, or even more so.

Not to mention being hit by a Dou Sheng of the same level, even if he was hit by a six-star Dou Sheng, he would not be broken so easily, not to mention that now under this sword, these extremely hard claws are almost as fragile as tofu.

"——Dragon Slaying Sword?!"

This sluggishness lasted for a moment, and the three-headed demon dragon was finally awakened by the extremely intense and terrifying pressure on the ancient dragon bloodline.

It looked at Zi Yan who was walking in the void, and finally stopped at the golden liquid long sword held by the latter. Its cold and crazy slender pupils suddenly shrank into a dazzling scarlet thin line, and it couldn't help but screamed out of its mouth in disbelief.

The fear of the sword finally awakened a trace of the North Dragon King's reason. A sense of horror surged in its originally red and crazy eyes. The twisted and dirty three-headed monster trembled as it looked at the golden liquid long sword held in Zi Yan's hand. The three dragon heads instinctively showed strong horror and fear at the same time.

"Dragon Slaying Sword...?"

The pressure suddenly dropped, and Xiao Yan, who was about to lose strength, breathed a sigh of relief, and couldn't help but stare at the long sword formed by the golden liquid in Zi Yan's hand.

With Xiao Yan's eyesight, it was not difficult to see that the sword was actually condensed from the power of a particularly pure ancient dragon bloodline, which was completely different from Nalan's sword-transforming sword. Moreover, this was obviously not an ordinary ancient dragon bloodline. It must be the mysterious royal bloodline mentioned by Zi Yan and the three dragon kings that could condense this particularly terrifying sword.

And Xiao Yan did not guess wrong. The Dragon-Slaying Sword is not a weapon, but a most powerful fighting skill among the Taixu Ancient Dragon Clan. This kind of fighting skill can only be achieved by those with the purest royal bloodline. The ancient dragon can be used just now.

In fact, even the previous three dragon kings could not use such a terrifying sword, otherwise Ziyan and Donglong Island would not be able to sustain it for so long.

It's just that the monsters born from the three dragon kings obviously didn't expect that Zi Yan would be able to use the dragon-slaying sword now.

You must know that even the previous Dragon Emperor was only able to summon the Dragon Slayer Sword after reaching the level of Six-Star Fighting Saint, and the current Ziyan is only in the early stage of Four-star Fighting Saint.

After all, the last Dragon Emperor was just Taixu Ancient Dragon in the final analysis, and Zi Yan is the Supreme Warcraft that has not been seen for thousands of years. Given time, as long as Zi Yan continues to grow, it will only be time to surpass the previous Dragon Emperor. Just a problem.

"Dragon-slaying sword?! Why do you have such a thing!"

"It's just that I'm stronger."

Zi Yan didn't bother to argue with this monster at all. After the blood power of the entire Taixu Ancient Dragon clan was injected into the formation, all this power was poured into Zi Yan's body, helping her to skyrocket in cultivation. The pressure and load of using the Dragon Slayer Sword It’s not that big anymore.

"It's just good luck, it's just good luck! What's there to be proud of?! I just let you pick up the Dragon Phoenix Origin Fruit. If it was me who got the Dragon Phoenix Origin Fruit in the past, I would definitely do better than you better!"

Zi Yan's movement of swinging the sword completely stung the monster's mind. Just now, the three-headed monster that could only laugh maniacally or curse, now seems to have been frightened out of some sense by Zi Yan. The three dragon kings Among the overlapping rumbling sounds, the voice of the Northern Dragon King became clearer and clearer, with a hint of particularly strong resentment.

"Then why didn't you see people coming from Beilong Island even though the Sky Demon Phoenix Clan came? Are you busy annexing Donglong Island so you don't have time?"

While Zi Yan was sarcastic, her wrists shook.

When the sword was swung down, there seemed to be a strange wave that spread out from the tip of the sword like lightning.

Even the three-headed demon dragon, which is now a huge headache for Xiao Yan, seems particularly weak in front of Zi Yan. With Zi Yan's sword swing, the powerful body of the three-headed demon dragon appears in front of Zi Yan. The dragon-slaying sword is as fragile as tofu in front of him.

The evil beast originally wanted to use fighting skills to defend himself and resist, but unfortunately, he underestimated Zi Yan's speed and even more underestimated the power of the dragon-slaying sword.

The golden sword energy flashed away and passed through the body, hardly forming any effective resistance.

Along with the three-headed demon dragon's chest, a torn blood hole appeared. A trace of golden blood was mixed with the filthy demonic energy, slowly dripping down, causing Zi Yan to frown slightly.

"Even the ancient dragon blood flowing in your body will bring shame to you."

Zi Yan said, although the Northern Dragon King decisively chose to transform into a demon to strengthen himself while weakening Zi Yan's strength to the maximum extent, in the final analysis, it would still take some time for him to transform into a demon to completely refine those ancient dragon bloodlines, but In front of the dragon-slaying sword, everything is as pale and powerless as a blank sheet of paper.

The three-headed demon dragon that Xiao Yan had been unable to do anything about just now actually lost the power of resistance without even catching Zi Yan's three swords.

Xiao Yan seemed to suddenly remember something, and couldn't help but said: "Zi Yan, take his dragon heart, I will be of great use."

Although she didn't know what Xiao Yan wanted to do, since Xiao Yan said so, Zi Yan no longer hesitated. The sword in her hand flashed, and a long golden thread penetrated the body of the demon dragon, and in a flash, Pass.

As all the meridians on it were cut off by the sword light, the heart of the demon dragon, even if it was stripped alive, was still beating tenaciously, full of ominous vitality, and was then caught by Xiao Yan.

Seeing that Xiao Yan had already got what he wanted, Zi Yan naturally couldn't leave it a way to survive. The only way out for such an evil beast that blasphemed the ancient dragon's bloodline was death.

However, just when Zi Yan swung her sword to sweep it down again, an extremely thick mountain appeared as a shield in the boundless void. Zi Yan's purple gold eyes suddenly condensed, and she instantly amplified the power of the dragon-slaying sword in her hand. Amidst the shocking roar of the mountains, the mountains as huge as Donglong Island were cut in two under the Ziyan sword.

But under the mountain, the huge body of the demon dragon was missing.

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