Follow the black girl all the way and appear in front of the two twisted and tangled mountains. These two peaks seem to be twisted together by some force, the shape is very strange, I have passed here many times, I always feel eerie, I don't try to get closer, and I always move away quickly.

But the black girl is in an abnormal state today, and she has rushed in, and there is no trace at all.

Tang Yan took out the ancient war knife and approached it while being vigilant, it was dark and damp, completely covered by the clutter and dense ancient trees, and some branches even climbed all the way up the mountain, hundreds of meters high.

Between the branches of this almost impermeable rhizome, there is a passage that has been forcibly broken, extending into it, which should have been just made by the black girl.

"What the hell is this little guy doing?" Tang Yan was worried about the safety of the black girl, so he no longer hesitated and rushed in through the long passage.

After a long period of darkness, it suddenly became clear that it was a slender canyon, and the dark red pillars of light projected down from the gap between the two mountain peaks, illuminating the place in a blood-red drows.

Along the slender canyon forward, there is a hundred-meter-wide pool not far away, the area is not too large, but the bottom is not deep, the pool water is as black as ink, exuding a chill.

The mountains around the deep pool are followed by thick ice crystals, which also exude bursts of cold air.

The black girl was staring at the deep pool with blood-red eyes, and the blazing black lightning was wrapped around her body, like countless black snakes were rushing, exuding a sinister aura.

Tang Yan looked around curiously, and also came to the edge of the deep pool, the dark deep pool was bubbling with thick bubbles, splashing water from time to time, and a low roar was faintly heard, as if something was struggling inside.

"What's inside?" Tang Yan tentatively took a step forward, layers of ice crystals instantly covered the soles of his feet, and even rushed towards his right leg, the terrible freezing sensation almost made his right foot lose its senses.

There was a thrill in his heart, and the ghost green fire rushed out, quickly clearing the ice crystals.

At this moment, the black girl suddenly took two steps back vigilantly, grinning her teeth, and her whole body was thunderous, as if she might rush over at any time.

Tang Yan didn't dare to stay, and retreated more than ten steps in a blink of an eye.

Thundered!

The deep pool suddenly set off fluffy waves, black water splashed in all directions, and the temperature of the entire canyon dropped sharply, and it was even difficult to breathe.

A huge crocodile more than ten meters long suddenly appeared, covered with steel-like black scale armor, dense persistence flashed with a sharp cold light, the head full of black thorns looked hideous and terrifying, and the two blood-red eyes emitted a ferocious and violent light.

With its appearance, the ice crystals all over the canyon turned black in the dense crunching sound, and the temperature dropped sharply again, and Tang Yan had to be covered in green flames all over his body to resist the icy temperature here.

"What the hell is this!" Tang Yan inhaled quietly, and involuntarily took two more steps back, even the black girl was roaring back, and the provocative momentum gradually subsided.

This huge and hideous black crocodile must be the overlord of one side, and the fierce and terrifying power is definitely a fifth-level demon king!

"Niu, you're naughty again, let's go, come home with me. Tang Yan grinned secretly, what did he bring himself in? Hunting the Demon King?

The black girl felt the great pressure, but suddenly took two steps forward, her hair stood on end, and she let out a deafening roar, and the roar was fierce, piercing through the golden cracking stones, and actually shattered a large area of ice crystals.

The black crocodile must have been in a rage, suddenly felt the provocation, and suddenly stopped, staring at the black girl with scarlet eyes, and the huge body swayed forward, and the fierce power overwhelmed Tang Yan breathlessly.

The black girl slowly lowered her head, bulging up, her hair standing upside down, and even her fangs and claws were wrapped around the black mang, completely wanting to fight wildly.

Tang Yan had never seen a black girl have such a look, and couldn't help but take a few more glances at this dire crocodile.

"Roar!!" the black dire crocodile let out a tyrannical roar, its huge body shook violently, and the black pool, which had just been quiet, suddenly churned, rolling up a dense stream of water arrows and bursting towards them.

"Niu, you're crazy, go!!" Tang Yan was startled, and quickly retreated behind him, he had experienced the extremely cold temperature of these black waters, but before he could run a few steps, the water arrows in the sky suddenly burst open, spilling down on the entire canyon, and the crunching sound was particularly terrifying in this lonely and cold canyon.

It's actually frozen the canyon, what is it for? Ready to eat?!

The black girl roared again and again, and rushed over, and a dense storm of black electricity swept through the audience.

"Come back!!" Tang Yan's face changed suddenly, and he didn't hesitate, he rushed forward with his ancient battle knife, the ghost green fire swept out, and the flame quadruple attack was ready to go!

The black crocodile was not afraid at all, roaring and rolling, a surging water dragon roared towards them, seemingly gentle, but ruthlessly smashed all the black mangs, and before they got close, they were directly washed into the corner, and the black water turned into thick ice in a blink of an eye and sealed them inside.

"Killed by you!!" Tang Yan tried his best to prop up the ghost green fire to resist the freezing of these black waters, but the black girl was so warlike that she used black electricity to smash the ice.

At this time, with the madness of the black crocodile, the entire canyon was completely frozen, and the exit was sealed, braving the cold air. The black crocodile did not stop there, and retreated into the deep pool and writhed wildly, its huge body constantly splashing layers of water waves, and the temperature of the canyon dropped again and again!

But......

The brunette still didn't give up and roared at the crocodile.

Tang Yan finally realized the problem, the Blood Soul Tree in the sea of qi actually disappeared, and he hid out of the mist baby and hid into the abyss of the sea of qi, and the blood doll was also immersed in the innermost end, and even the Buddha's heart fell silent.

What's going on?!Are they scared?

As soon as this thought came to mind, even Tang Yan was stunned, what else could there be in this world that made them feel frightened?

Is it because of this massive dinosaur?

Not really!

Is it because of this deep pool?!

Tang Yan had to calm down and observe, hey, something was wrong! The black crocodile didn't seem to be going crazy, but like it was ...... The deafening roar was mixed with a groan of pain, and the frantic writhing seemed to be getting rid of something.

If you look closely, you will find several special bones on its back!

Some were pale and full of cracks, like bones from the spine. At this moment, it is embedded in the scales of the ancient crocodile's back, and the joint part is already dripping with blood.

Tang Yan looked at the painful dinosaur crocodile, looked at the bones inlaid on its back, and then looked at the irritable black girl, and suddenly there was a strange conjecture, didn't these bones want to merge into the crocodile's body?

Where did the bones come from, could it be the bones of those desolate beasts in the underground world?

Can......

How did it come about?

Could it be that there is still wisdom left in this bone?

Why choose this crocodile?

Could it be the offspring of this desolate beast, or is this crocodile a little bit of its bloodline?

What does it want to do? Does it want to be reborn?

All kinds of doubts and suspicions are swirling in my mind, and the more I look at it, the more likely it becomes!

Suddenly, Tang Yan's eyes burst out with heat!

If the guess is correct, once the bones are fused, this crocodile will definitely undergo a transformation, and maybe it can recreate the mighty ferocity of the ancient beast.

The fact that this desolate beast can be suppressed in the underground world, and that it can still retain its spiritual wisdom after endless years is enough to show that this beast was an earth-shaking overlord-level existence hundreds of millions of years ago, far surpassing Xu Yan's arm bone.

The dinosaur should be very weak in the early stage of awakening, if he can seize this period of weakness and refine and devour it in one fell swoop, wouldn't he be able to successfully activate his spiritual vein?

But......

Impulsiveness quickly turns into worry!

This is a desolate ancient fierce beast, maybe it's not as simple as seven or eight levels, and his spiritual vein hasn't been determined what grade it is, can it withstand its erosion?

When the time comes, if you can't give it up, you will die because of it.

But just give up?

The black crocodile let out a painful wail, and the struggle became more and more intense, and the crazy twisting impact from the deep pool almost shattered the entire canyon, but the bones were embedded in its back, fusing inward little by little, and the scarlet blood began to spread to the bones, and the real fusion between them began.

The black crocodile suddenly let out an earth-shattering roar, and the sharp sound waves seemed to contain Gang Qi, and the cliffs thousands of feet high shattered into pieces, and dense gravel fell from the sky, and even the earth began to crack.

The crocodile's aura was changing clearly and violently, and its scarlet eyes were becoming particularly ferocious.