After straddle and ride on the nine-clawed dragon and dragon horns, Zhang Yuan's body seemed to be covered by a bubble, and there was not a trace of water around his body, but looking around, the rippling pool of water was only one meter away from Zhang Yuan.

All the way down, although the water pressure gradually strengthened, but as a water system, the nine-clawed divine dragon would never care about such a small pressure, even if there was pressure, it would be converted into power by the nine-clawed divine dragon, making him swim faster.

"Boom ......" Finally, when the nine-clawed divine dragon dived to a certain depth, it suddenly ...... A horizontal stream of water roared over, and even the nine-clawed divine dragon was rushed out a few hundred meters without a quick defense, and only then did it control its body and regain its balance.

However, I have to say that for the nine-clawed dragon, the water is his world, once he enters the water, it is like returning home, although he was washed away by the current, but he did not suffer any damage, but he just rushed out of the water for a distance, it was easy to control it, feeling the turbulent water, Zhang Yuan knew that this was an underground river, and he recalled about it, if he continued to follow the direction of the current, he should have drifted towards the crescent moon bend, And this is obviously not Zhang Yuan's destination.

Thinking about it, Zhang Yuan suddenly turned the dragon's head and swam in the opposite direction, if you want to cultivate, you must find an open space underground, so there is no way to cultivate while riding on the dragon.

All the way along, and soon ...... Zhang Yuan passed under the waterhole again, and then continued to swim, swimming towards the location of the residential area and the school......

After swimming for a while, the direction of the underground river changed, it seemed to be raised a lot, and it was all the way up, and then it turned a few times in the middle, and it was about a thousand meters of swimming, and finally ...... The surroundings were empty, and Zhang Yuan clearly felt that there was air flowing!

Reaching into his arms, Zhang Yuan took out a luminous stone, and in an instant, he ...... A blazing white light shone in the pitch-black space, illuminating the surrounding space.

The so-called noctilucent stone is one of the commonly used lighting tools in this world, during the day, when it is placed in the sun, it will radiate bright light at night, and the effect is better than that of a light bulb.

Looking around, this is a huge grotto with a height of 100 meters and an area of 10,000 square meters, and the underground river flows through the middle of the grotto, dividing the entire grotto into two spaces, one large and one small.

Inlaid the luminous stone on his chest, Zhang Yuan jumped down from the head of the nine-clawed divine dragon, stepped on the ground of the grotto, closed his eyes slightly, and felt the rich water energy around him, Zhang Yuan laughed excitedly.

Not daring to slack off, Zhang Yuan hurriedly put away the Nine-Clawed Divine Dragon, and then hit the luminous stone, found a half-foot-high stone platform, sat cross-legged on it, and entered the cultivation state.

Zhang Yuan entered the state of cultivation, and for a moment of dizziness, his soul instantly entered the Dragon Ball, and when Zhang Yuan regained his eyesight again, there was already a purple-blue world around him.

Looking around, the purple-blue time was empty, with Zhang Yuan as the center, countless purple-blue dragon-shaped air currents were shuttling and cruising in the space.

One...... Two...... Three...... After counting carefully, there were a total of ninety-nine blue dragon-shaped air currents, constantly swimming around Zhang Yuan, seeing this scene, Zhang Yuan knew that this was the ninety-nine dragon qi evolved from the ten-star Dragon Ball.

In addition to these ninety-nine dragon-shaped air currents, the entire space was covered with blue balls of light, all of which were evenly distributed throughout the space, all of them were extremely round, as if they were round blue crystal balls, suspended in mid-air.

Although the shape is exactly the same, they are all blue, but the shades of color are different, from light blue to light blue, from sky blue to sea blue, from dark blue to violet blue......

With a dip in his right hand, a dragon-shaped air flow roared in, wrapping around Zhang Yuan's right arm, constantly spinning, and at the same time, Zhang Yuan's gaze carefully observed the surroundings.

After watching for a while, Zhang Yuan waved his hand suddenly, and in an instant, the dragon-shaped air flow coiled around Zhang Yuan's arm roared out and rushed towards a round blue ball of energy.

According to Professor Linghu, if you want to choose the most suitable energy for yourself, it is not difficult, as long as you choose those energy absorption that is the same color as your Dragon Ball, the color is the same, the characteristics are the same, once combined, complement each other, promote each other, and greatly improve the ability.

Under Zhang Yuan's control, the blue dragon-shaped airflow suddenly opened its big mouth, and in a whistling moment, it swallowed a ball of origin energy that was also purple and blue into his mouth, and his body quickly coiled, and he turned around and flew back.

Seeing this scene, Zhang Yuan didn't pay much attention to it, it would take a little time to completely fuse that origin energy, so Zhang Yuan beckoned again, and the second dragon-shaped air flow wrapped around Zhang Yuan's right arm.

Looking around, although there were a lot of blue earth energy balls, definitely ten times more than when Zhang Yuan was cultivating before, there were not many purple and blue earth energy balls, and there was not even one within the range of his eyes.

In desperation, Zhang Yuan's heart moved, and he quickly flew forward, and after flying not far away, another purple-blue earth origin energy appeared in Zhang Yuandi's sight, seeing this scene, Zhang Yuan's right hand waved instantly, and the dragon-shaped airflow roared out.

In the next time, Zhang Yuan galloped all the way, galloping at full speed in the space of the Dragon Ball Land, and every time he saw the purple-blue earth energy, he would swing out a dragon-shaped air flow to devour it.

I don't know how long it took, but finally ...... Ninety-nine dragon-shaped air currents each devoured a purple-blue earth origin energy, and they all coiled together, silently digesting, devouring, and fusing it, and only after successfully digesting, devouring, and fusing would these energies be controlled by Zhang Yuan.

Seeing this scene, Zhang Yuan left the Dragon Ball space, and his soul returned to his body again, and after standing up and moving for a while, Zhang Yuan was about to go back to the ground, but he was stunned!

Now, Zhang Yuanwei and the underwater grotto, if he wants to rely on his own words, he will never be able to return to the ground, but the energy of the nine-clawed divine dragon earth is now astigmatized, and he has just devoured the ninety-nine energy, but he has not completely digested and fused, and he can't summon the dragon at all!

Standing there stunned, although he didn't want to believe it, Zhang Yuan knew that he was trapped here, and unless he could summon his dragon again, he would never want to go out.

Wiping the sweat from his forehead, Zhang Yuan didn't dare to slack off, he sat down cross-legged again, and used his spiritual power to speed up the digestion and fusion of those dragon-shaped air currents, before he was starved to death, he had to summon his dragon again!

With Zhang Yuan's preoccupied efforts, the ninety-nine dragon-shaped airflows finally succeeded in digesting and fusing the purple-blue earth origin energy, Zhang Yuan once again condensed his soul and entered the dragon ball, and after successfully devouring one of the origin energy, the ninety-nine dragon-shaped airflows condensed a lot, and the movement became more flexible.

After controlling all the dragon-shaped airflows, and once again devouring a piece of origin energy, Zhang Yuan once again controlled his soul and returned to the inside, exerting his spiritual power to help these dragon-shaped airflows digest and fuse.

Time passed slowly, and Zhang Yuan's recovery speed was also fast, I don't know how long it took, and finally ...... When the ninety-nine air currents devoured the nine energy origins respectively, the dragon body was finally condensed again. After meditating and cultivating, Zhang Yuan stood up for the first time, ten hours had passed, and he didn't know what time it was outside, once he was late for class, the consequences would be very strict.

Nine-clawed dragon! Accompanied by Zhang Yuan's heavy drinking, he ...... in an instant Countless purple-blue bubbles slowly rose, and then all the bubbles turned into a hurricane, surrounding Zhang Yuan in a quick turn, condensing into a purple-blue nine-clawed divine dragon!

In terms of form alone, the Nine-Clawed Divine Dragon did not seem to have undergone any changes, but its color had become extremely purple and blue, and its body was no longer a turbid and opaque flesh-like form, but had become a crystal-like transparent body.

Of course, although the body of the Nine-Clawed Divine Dragon has become transparent, because the surface of the Nine-clawed Divine Dragon's body is covered with scales, under the refraction of light, the body of the Nine-clawed Divine Dragon is not transparent, and the scale layer is like a patterned glass, isolating the perspective.