The half-hour-long battle made Xiao Han's consumption a lot, and it also made his heart rate increase a lot.

At the time of the Wild Boar Demon Beast, he immediately sat cross-legged and began to operate the Great Heavenly Derivative Scripture to absorb the Xuan Qi, and in just a moment, his consumption was replenished, and the Xuan Qi in his dantian was also increasing at an astonishing speed.

In about half an hour, he refined a drop of Xuan liquid.

If calculated according to one drop a day, his cultivation speed is almost twenty-four times higher than usual!

After refining a drop of Xuan liquid, Xiao Han's heart rate gradually calmed down.

Then Xiao Han pulled out the Xinghan Sword, turned around and stabbed the head of the Wild Boar Demon Beast, and with a slight prie, a dragon's eye-sized demon core rolled out along the root of the sword.

"The magic core of a first-order demonic beast can also be sold for a good price outside!"

After Xiao Han took the demon core into his arms, he turned into an afterimage and disappeared in place.

In a certain forest, another fierce beast the size of a small mountain fell to the ground with a bang, blood flowing, staining the grass on the ground.

"Phew, finally got rid of this guy. ”

Xiao Han breathed a sigh of relief, this was already the fifth demonic beast he had dealt with in the Grand Canyon.

The strength of this Demonic Beast was very close to the peak of the First Order, and it was the most powerful Demonic Beast that Xiao Han had ever encountered so far, and it took him nearly an hour to grind this Demonic Beast to death.

Xiao Han inserted the Xinghan Sword into the ground and ran the exercises as soon as possible.

The battle for nearly two hours also raised his heart rate to an extreme, and this time, he fully refined two drops of Xuan Liquid.

With the addition of the previous four drops, he refined six drops of Xuan Liquid tonight.

"That's right, with my current cultivation progress, within half a month, I should be able to break through to the middle stage of the Xuanling Realm. ”

Xiao Han dusted off his clothes and stood up, and at this time, the mountains in the distance also began to rise a little white.

"It's almost dawn, do you want to go back?"

Under normal circumstances, students practice in their own rooms, and the elders will not come to check the room, but special circumstances are not ruled out.

Xiao Han lowered his head and pondered for a moment, and finally decided not to return it.

First, he went deep into the depths of the Grand Canyon, and it would take a long time to go back.

Second, if he goes back, he will be discovered by the patrolling crews, which will be self-defeating.

Third, even if the Elder went to his room to look for him and found that he was not in the Sky Giant, it would be okay to tell them the truth when he returned.

Anyway, he came to practice in the Grand Canyon, and he wasn't doing anything harmful.

......

Xiao Han's spiritual power has reached level eighteen, which can cover a radius of five miles.

With his strong spiritual power and rich experience in the jungle, Xiao Han was like a fish in water in this jungle, and his cultivation grew wildly, and in just two days, he cultivated fifty drops of Xuan Liquid.

On the third day of the Black Mountain Grand Canyon, Xiao Han came to a river.

"Black River!"

This river begins in the Black Mountains, passes through the Grand Canyon, flows through the Dragon Mountains, and finally flows to the Savage Beast Domain.

This river is only about five or six meters wide, but it is the only river in the Grand Canyon, so there are a large number of fierce beasts and demonic beasts gathering on both sides of the river at any time.

"There's something strange about this river!" Xiao Han stood on the top of the tallest tree, taking in the views on both sides of the river.

Under normal circumstances, when the fierce beasts and demonic beasts arrive at the water source, they will drink water as soon as possible and leave.

But by this river, there are so many fierce beasts and demonic beasts, but they dare not go over when they look at the water source.

"Is there something big in this river that can't be done?"

Xiao Han frowned, the ordinary first-order demonic beasts were also counted, and even a few third-order giant ape demonic beasts in the distance did not dare to approach the black river.

You must know that the second-order demonic beast is equivalent to the Taixuan Realm, and the third-order demonic beast is equivalent to the Xuantian Realm.

It stands to reason that the third-order demonic beasts are already considered to be the overlords in this Grand Canyon, and even the demonic beasts of this level dare not approach the Black River, which shows how powerful the fierce creatures in this river are.

Xiao Han released his spiritual power and swept towards the river.

"Hey, this river is so cold, it's so cold that my spiritual power can't penetrate it!"

Xiao Han was taken aback, even if it was cold ice, his spiritual power could penetrate it, but the river was so cold that his spiritual power could not penetrate it.

He looked down and thought about it, and after a long time he said word by word: "Absolutely-right-zero-degree!"

Absolute zero is the lowest temperature that an object can reach, at which the object will not have any internal energy.

And spiritual power is actually a kind of energy, no wonder even his spiritual power can't penetrate.

The absolute zero of an object is minus 273 degrees.

Xiao Han felt unbelievable, under normal circumstances, the river water would freeze at zero degrees Celsius, and after a long period of low temperature, the entire river surface would freeze.

The water in front of me has reached absolute zero, and there is no sign of freezing at all.

And what's even more strange is that the river is so cold, and they can't feel a trace of cold when they stand on both sides of the river.

"No wonder these fierce beasts and demonic beasts dare not come forward to drink water, such cold water, I am afraid that these fierce beasts have not drunk the water in their stomachs, they have already frozen into a popsicle. ”

When things go wrong, there must be demons.

Xiao Han quietly looked at everything in front of him.

After about ten minutes, these fierce beasts and demonic beasts all moved, and they swarmed towards the Black River.

Xiao Han was shocked, were these fierce beasts and demonic beasts crazy or stupid, and they dared to rush up to such a cold river.

However, his vision of being frozen into popsicles did not materialize, and the beasts rushed into the river to drink to their heart's content.

Xiao Han was stunned by the experience in front of him.

"How so!"

Then he immediately released his spiritual power to investigate again.

This time, his spiritual power penetrated the river very smoothly, the fish and shrimp in the river were clearly visible, and there were even groups of piranha beasts in the river, some demonic beasts went down to the river to drink, and were directly dragged to the depths by these piranhas.

If it weren't for Xiao Han seeing the scene just now, he would even believe that this was a very ordinary river without any doubt.

About ten years later, these fierce beasts and demonic beasts left Heihe one after another.

As if there was a magical force, the river water, which had been muddy by these fierce beasts just now, was restored to clarity in the blink of an eye.

And at this moment, the river water suddenly returned to absolute zero, and his spiritual power was once again impenetrable.

Xiao Han frowned, this kind of scene was unheard of even by him.

Then he set his eyes on the beasts that had come ashore.

"These fierce beasts and demonic beasts are all native to the Grand Canyon, so they should know this river very well!"

Xiao Han jumped off the canopy, caught a fierce beast with a relatively high level of intelligence, and then used his spiritual power to forcibly search for the memories of Heihe in its mind.

"I see, Heihe will lift the ban for ten minutes at this point in time every day, and the rest of the time is all in absolute zero. ”

In addition to this information, Xiao Han also learned from the beast's brain that there was a very large pool of water in the upper reaches of this river.

As soon as Xiao Han came out of the pool of water in the beast's mind, the beast began to tremble.

The beast had no memory of this waterhole.

Xiao Han was slightly stunned, "I don't have any memory, it will tremble when I turn out of the pool!"