The greyhound heard Xigu's instructions to him, raised his head in joy, rubbed Xigu's trouser leg, and jumped into the middle of the room.

However, it swayed its head from side to side, and after watching it for a while, it did not act immediately.

"The host...... Over here...... Easy to break. ”

"Oh?"

Xi Gu raised his eyebrows in surprise.

I didn't expect the evolved gray dog to automatically comprehend the rule of "can't be wantonly destroyed" without being reminded.

From this point of view, the evaluation of the degree of its wisdom is even higher.

“OK。”

Xi Gu snapped his fingers and walked out the door with the greyhound.

Beyond the residence, there is a deserted countryside, and just on the edge of the countryside, there are dense mountain forests.

"Come on, try it outside, so you can do it with confidence!"

……

"Whew-"

In the wilderness of the mountains and forests, the figure of the gray dog turned into a gray line, shuttling through the forest wantonly, and everywhere its body went, both shrubs and trees bent and fell as if they were hit by a rapidly falling rock.

The gray shadow is like a shuttle, while roaring, while raising its head wantonly in the mountains and forests, wolves and tigers, showing the temperament of pride in the mountains and forests.

It was like the shackles on its body were smashed, and it was like a boulder pressing down on its back was removed, and the gray dog's eyes were full of pleasure, and this kind of extremely fast running made it feel unprecedented pleasure, and it ran happily on all fours.

- It's only been a few years since I was born. But in my memory, from birth to adulthood, I have almost never felt so wanton and wild as I do now.

In his childhood, he lived in the original master's house, when his body was not yet fully grown; When he became an adult, he was tied up in a small courtyard in the countryside, and he could only howl at the sky; After being abandoned, his leg was broken before he could start wandering, and he couldn't run even if he wanted to...... It wasn't until now that I finally felt the charm of this swift run in the body of a newborn student-

The gray figure jumped from the tip of the tree, and suddenly crossed dozens of meters high, and its body flew to the top of the mountain like thunder!

"Whew!"

The gray dog roared again, and the gray line that swept through the mountains and forests suddenly stopped, and in an instant, its body showed a posture from extreme movement to extreme quiet, and landed lightly on the top of the mountain.

This instantaneous change in movement is enough to make the boxing king of the century dumbfounded, make the great martial arts master cry, and eclipse the fighting body technique created by mankind for thousands of years.

But it's just this gray dog's, just a slight jump.

After landing on the top of the mountain, he immediately turned his head, looked at Xi Gu, who was following all the way, and wagged his tail excitedly at him.

Nodding his head, indicating that he already understood, Xi Gu smiled.

Because of the existence of the "Evolutionary Blood", in the process of rushing to the ground just now, everything that the gray dog could feel and think, Xi Gu could also sense at the same time.

So he naturally understood the reason for the Greyhound's excitement.

In addition, in the gray dog's jumping body, every muscle and blood, and even the information of nerve vibration are firmly stored in the memory bank of his brain, which has become part of his "superpower era creation plan".

"Hmm...... Is this the case – the average velocity is about 120 m/s, the burst speed can reach 180 m/s, and even the crawling speed in the mountains and forests is more than 75 m/s.

"In terms of body speed alone, the burst speed is close to six times the extreme speed of the cheetah, and the average speed is about four times the ultimate speed of the cheetah. And judging from the performance of the tree breaking and collapsing just now, but it was unscathed, its body is as tough as steel.

“…… Well, in that case, let's try its punch again. ”

Thinking of this, Xi Gu sent a command to the gray dog in his mind.

"Crash into me with all your might, using your strongest attack."

The greyhound immediately widened his eyes and looked at Xi Gu with a "whine" sound.

It retracted its two front paws, gave a reluctant look, and even shook its head.

"The host...... I can't...... ...... like this"

"It's okay, you just have to try."

"But ......"

After a long time, at Xi Gu's insistent request, the gray dog finally deflated his face, and cautiously, slowly hit Xi Gu at a low speed of less than 10m/s.

"Bang-"

Xi Gu patted its body dissatisfied, and slapped it directly upside down.

"Don't be so perfunctory! Full! I'm talking about full force! ”

"Woo-"

The greyhound lifted its two front paws, touched its head aggrievedly, and again, finally barely increased its speed to 20m/s and crashed into Xi Gu.

"Crotch—"

Xi Gu slapped back again, his face darkened.

"Don't worry about hurting me, don't worry, your power is no threat to me at all!"

As he spoke, in order to make the greyhound believe in himself more, he used less than one trillionth of his strength and gently slapped it on the ground-

"Boom!"

The earth shakes and the mountains shake.

With one man and one dog as the center, the whole mountain cracked a big crack!

“——！！”

The greyhound covers his eyes with his front paws in disbelief.

As a strange beast that has undergone the baptism of Xigu's "evolutionary blood", it can feel the breath of Xigu, and will have a strong admiration for Xigu, and regard Xigu as the absolute master......

However, if Xi Gu did not show it, it was completely impossible to know how powerful this master really was.

It was only now, when Xi Gu finally showed the tip of the iceberg of his ability, that the gray dog somewhat understood what kind of master he had met......

"Woo~Woo~"

Whistling quietly to express his surprise, this time, the gray dog finally straightened his posture. Obeying Xi Gu's call, it leaned down, gathering strength—

For a long time –

"Boom!"

Like a cannonball, the greyhound rushed forward!

"That's right~"

Xi Gu finally had a smile on his face, looking at the gray figure rushing in front of him, he gently stretched out a finger and slowly picked it up-

"Woohoo!"

The greyhound was immediately thrown out like a kite with a broken string!

"One more time!"

Xi Gu continued to speak to it in his heart.

Not far away, the greyhound, which had climbed out of the wood, stone, and dust, nodded excitedly, and just as it had just flipped back at great speed, it experienced a strange joy, just like the rolling game it played when it was young.

So this time, it gathered more strength, burst out with faster speed, showed a stronger impact, and rushed towards Xi Gu!

However, it was still thrown away by a finger without accident-

"One more time!"

Cold-blooded and ruthless test language.

"Woohoo!"

The sound of extremely excited play.

……

Finally, the test is complete.

After collecting for most of the day, Xi Gu asked Wuzi, who was still a little reluctant, to stop the "shock wave" and slowly walked home with him.

In the back of his mind, the test data about this original "alien beast".

"The burst speed is 180m/s, and when you are extremely excited, it can be close to 190m/s, and the maximum instantaneous kinetic energy of the burst is close to 2 megajoules, which is tens of thousands of times that of a bullet for an automatic rifle, tens of thousands of times that of a bullet for a heavy machine gun, and hundreds of times that of a bullet for a bazooka, which is close to the kinetic energy of an anti-tank gun shell...... If it is placed on a modern battlefield, it can destroy tanks and run rampant; If it is placed in the city, it can destroy hundreds of buildings and kill hundreds of thousands of people in half a day......"

Sigu pondered the data and glanced at the greyhound that was clinging to his feet, following in his footsteps.

Noticing the sight of his master, the gray dog raised his head and barked excitedly at Xi Gu, the gray-white fur looked extremely smooth in the moonlight, and although the body of more than one meter long was burly, it was not so frightening, and its expression was funny, and it looked harmless to humans and animals.

No one could have imagined that this would be a beast that could destroy a neighborhood in the blink of an eye.

Thinking of this, Xi Gu couldn't help but smile.

"It seems that my 'superpower era plan' can continue to move forward. But about this greyhound...... I still have to give it a name first, otherwise I'm a little sorry for the pioneers of this era. ”

Thinking like this, Xi Gu hooked his fingers, let the gray dog stick out his head, gently touched its head, and said to it in his heart:

"Hmm...... From today onwards, you will be called 'Grey Shadow'! ”