After saying the obscure mantra, the faces of the two black-clothed men also showed a rare solemnity, and their faces became deeper than ever.

And at this moment, the black flames in their bodies suddenly and slowly rose, and finally formed ten thousand flames in the air.

In the end, the ten thousand black rays of light condensed and intertwined, turning into a magic pillar that towered from the sky, and the aura of extreme evil was permeated on it.

"Summoning the Ancestral Demon Pillar!"

After saying these two words, the Heavenly Demon Pillar formed by countless black flames suddenly trembled violently, and then burst into a raging fire, and the temperature of that flame even felt heartfelt palpitations even for the Spirit Desolate powerhouse!

At the same time, countless black fiery snakes began to emerge on the Heavenly Demon Pillar, which was like an inferno formed by endless flames, as if it was about to incinerate everything into nothingness, and then extinguish it in its deep and dim body!

Suddenly, at a certain moment, the endless black fire snake seemed to burn to the extreme, and then its body appeared an exaggerated expansion, and finally exploded with a bang!

And with the generation of this explosion, the flames on the entire magic pillar were like a chain reaction, and they began to explode one after another, and after only a few breaths, all the fire snakes had caused an overwhelming amount of energy, and finally all converged to the center of the magic pillar.

It was like an endless amount of magma under a towering volcano, and suddenly a huge meteorite fell into it, and the waves of fire began to surge like a tide.

And after absorbing the energy of those black snakes after the explosion, the color of the Heavenly Demon Pillar became deeper and darker, and the evil aura became more and more powerful!

Finally, at a certain moment, all the energy was fused into the Tongtian Demon Pillar, and the Demon Pillar suddenly trembled violently, and then a burst of black light penetrated the Nine Heavens and Ten Earths from the top.

The palpitating black light went straight to the Nine Heavens Universe, and it seemed to go straight to the sky, trying to poke a hole in the sky.

At this moment, the top space suddenly shook violently, and it seemed that the space had become extremely unstable and was about to shatter!

Finally, at a certain moment, with a bang, even the space could no longer withstand such a powerful force, and then it broke into pieces with a bang, and there was an endless darkness inside.

As the space debris broke open, the boundless darkness inside seemed to be pregnant with something, and it seemed that something extremely evil was about to descend!

Feeling the shattering of this space, the things inside rolled in as if they had traveled through the long river of time, and a solemn look slowly appeared on the faces of the two black-clothed people.

They don't want to use this method unless they have to!

After all, after summoning the Ancestral Fire, although they were able to use the power of the Ancestral Fire to increase their strength in a short period of time, there was also a certain time limit.

Moreover, after the ancestral fire is used, it will not remain in their hands at all, but will continue to fly into the boundless dark space.

Moreover, after using this method, there will be a huge loss of their strength in the next period of time, and they may not even be able to defeat the Spirit Lord powerhouse in a short period of time!

And most importantly, this black flame ancestral flame is a taboo in their forces, and it can be said that it is absolutely forbidden to use it unless it is absolutely necessary!

Only when their lives are at stake can they summon this ancestral fire once.

And every time they are summoned, they will pay a huge price behind their forces. Therefore, they always set a rule above that the method of summoning the ancestral fire can only be used unless it is a desperate moment when their lives are in danger!

And even after using it, you must bring back the treasure that matches the price this time, otherwise they will be punished extremely severely when they go back!

If it weren't for the fact that he hadn't seen the spirit vein fire of the undead beast in Gu Lin's body today, and this spirit vein fire was not afraid even in the face of the black flame in their body, the two men in black would definitely not use the hole card of summoning the ancestral fire.

After all, as soon as this move comes out, if Gu Lin can't be captured and the spirit vein fire of the undead beast on his body is taken out, the two of them will probably be punished unimaginably when they go back!

Thinking of this, a touch of scarlet suddenly appeared in the eyes of the two men in black, thinking about the kind of punishment that even they felt frightened, and a look of madness suddenly appeared on their faces.

Today, no matter what, they must take away the flames in this kid's body! Only then can they have an account for the above!

Thinking of this, the expressions of the two of them appeared at the same time, and then after looking at each other, they nodded firmly and fiercely!

Both fists slammed into the chest, and a mouthful of black blood spat out of their mouths.

The blood was filled with a terrifying and powerful energy, and it was obviously not the ordinary blood in the human body.

As this black blood was taken out, the faces of the two men in black also turned much paler, as if this black blood had a great loss on them!

But now they can't take care of so much, and the two of them immediately poured all this pool of black blood into the Heavenly Demon Pillar.

At the same time, the Heavenly Demon Pillar seemed to be about to hold up to the top of the Nine Heavens, could it be that the shattered space above finally had a touch of abnormal movement, and an incomparably dark and evil giant gate slowly emerged!

"Sacrifice fire with blood, the demon door opens, and the ancestral fire appears!"

There was a burst of heavy drinking in that person's mouth, and then the energy in the Heavenly Demon Pillar began to boil violently, and the black giant door in the top shattered space also became more and more condensed.

Finally, at a certain moment, the huge black door slowly opened, as if a treasure buried in the eternals was suddenly revealed, revealing an endless ancient mystery!

As the giant gate slowly opened, everything around it seemed to suddenly become quiet.

Everything was creeping with fear, as if something with a supreme aura was about to emerge!

Seeing this scene, a deep excitement also appeared on the faces of the two men in black.

Although he didn't have this kind of means to summon the ancestral fire, the price of casting it was extremely heavy, and it could be said that it was the first time they had used it in so many years!

But looking at it this way, it's definitely worth the price!

The things in it haven't appeared yet, with such a terrifying aura of destroying the nine heavens and ten earths, and when the ancestral fire really appears, it will be the time of that kid's death!

After a cup of tea, the evil black giant door finally opened completely, and at the same time, a black flame that rolled like a stormy wave finally came to this space with an unimaginable terrifying aura that had penetrated through the nine heavens and ten earths!