After leaving the Blue Water Lake, Yu Tianxiao and Lan Xing'er separated, and then each returned to their respective classes, and before parting, they agreed to start going to the fourth level of the promotion tower in a week.

In the next week, Lan Xing'er recuperated from her injuries while recuperating her body. Soon, due to the very good cell activity of Lan Xing'er's body, coupled with taking some drugs that make the body recover quickly, two days later, the little shoulder injury was completely healed.

Although Yu Tianxiao and Lan Xing'er are both in the virtual world, their consciousness will also be tired from the battle in the virtual world, so when they return to the real world, they also need to adjust their brains to give their brains a better rest in order to meet the next tower breaking mission.

What's more, before this, they had also fought with Hua Qianrui, so based on this, Lan Xing'er continued to recuperate after his injury, and at the same time, Yu Tianxiao was also making cultivation adjustments.

Time flies, and in the blink of an eye, a week passes quickly. During this week, Hua Qianrui really didn't trouble Lan Xing'er anymore, nor did she take any revenge on Yu Tianxiao, but completely quieted down.

Maybe he really kept his promise, maybe he was scared by Yu Tianxiao, in short, he really didn't take any further action, as if he had disappeared, Lan Xing'er only saw it once in class occasionally, and most of the time he didn't see the shadow of Hua Qianrui.

Hua Qianrui's quietness temporarily put Yu Tianxiao and Lan Xing'er's hanging hearts down, but they were still vigilant. Because of Hua Qianrui's person, maybe when they are defenseless, they will suddenly come to them and catch them off guard, which is the so-called 10,000 precautions, so it is better to be cautious.

Soon, it was time for Yu Tianxiao and Lan Xing'er to break into the tower, and at this moment, the two of them had already finished resting their bodies and completely recovered their original perfect state.

So, Blue Star Time, at more than eight o'clock in the dry morning of this day, Yu Tianxiao and Lan Xing'er came to the location of the promotion tower together as agreed.

When the two of them came to the location of the promotion tower, they couldn't help but see that many students had begun to enter the promotion tower one after another. Seeing this, the two of them did not hesitate, and immediately followed the flow of people into the promotion tower.

Because Yu Tianxiao and Lan Xing'er had already been to this promotion tower, passed the first three floors, and were relatively familiar with everything here, so when the two entered the promotion tower, they did not stop at all, but immediately walked upstairs along the spiral staircase.

In a short time, they came to the fourth floor of the promotion tower.

The decoration and layout of the fourth floor of the promotion tower are roughly the same as the first three floors, but the materials and specifications are much better than the first three floors, and of course the area is much smaller.

Because the number of students who break through the fourth-level promotion tower is much smaller than the number of people who break through the third-level promotion tower, that is to say, the more you go up, the fewer people can successfully pass the level, and the fewer people will naturally participate in the tower, and the corresponding promotion tower area will also shrink.

After entering the fourth layer of the promotion tower, Yu Tianxiao and Lan Xing'er couldn't help but see that dozens of people had gathered in the hall at this moment, and the number of people was obviously less than that of the third floor, which made the entire hall look a little empty.

Since it was not yet time to officially break into the tower, Yu Tianxiao and Lan Xing'er sat down together in the rest area. I saw other students, some resting in the rest area, and some standing on the side chatting in twos and threes, and everyone was waiting for the start of the tower.

About ten minutes later, Ding Dong! As an extremely pleasant electronic voice sounded, an old voice said, "Please enter the assessment room in order for all the students who break into the tower." ”

Suddenly, after this old voice, boom! All the students in the hall immediately dispersed, because everyone had already broken through the three-story promotion tower, and some of the rules for breaking into the tower were already familiar, so when everyone dispersed, they began to enter the assessment rooms one by one in a very orderly order.

Yu Tianxiao and Lan Xing'er also followed the team and entered an assessment room.

When they entered the assessment room, the two of them quickly chose a double alloy chair and sat down.

The moment they sit down, buzz! Immediately, a virtual helmet appeared above their heads, and the pure blue helmet was always shining with dazzling and charming blue light.

When that dazzling and charming light completely enveloped Yu Tianxiao and Lan Xing'er's heads, brush! In the blink of an eye, the consciousness of the two of them was immediately transported to the virtual world.

This is a blue sea, and I saw that above this sea, the waves are rolling, the waves are flying, and the water is extremely blue, surging against the reef on the shore. At this moment, Yu Tianxiao and Lan Xing'er appeared on a reef by the sea.

Standing on the reef, facing the cold sea breeze, looking at the surging and boundless sea under his feet, Yu Tianxiao couldn't help but exclaim: "I really didn't expect that this time, our battlefield is actually the ocean!" ”。

"Yes! It's incredible! Looking at the boundless ocean in front of her, Lan Xing'er also sighed.

However, just as the two of them were amazed by this, suddenly, a magnificent voice said slowly: "Welcome to the fourth-level promotion tower, the students who can successfully break through to the fourth-level promotion tower can be said to be definitely rough students!" ”

After a pause, the magnificent voice continued: "This time, your mission to break into the tower is: enter this ocean and find two Phantom Sea Dragon Balls. When you get these two Phantom Sea Dragon Balls, you will naturally have passed through this fourth-layer promotion tower. ”

"What! Phantom Sea Dragon Ball? Hearing this, Yu Tianxiao and Lan Xing'er were both shocked, and then shouted in unison.

"The Phantom Sea Dragon Ball is the Phantom Sea Dragon's own orb, and you can only finally get the Phantom Sea Dragon Ball if you defeat or kill the Phantom Sea Dragon Dragon. Go ahead! Good luck to you and make it through this fourth-tier advancement tower. As soon as the words fell, the magnificent voice immediately disappeared, and then all Yu Tianxiao and Lan Xing'er could hear was the surging sound of the sea.

"Unexpectedly, this time our opponent is actually the Phantom Sea Divine Dragon!" After being silent for a long time, Yu Tianxiao couldn't help but sigh and said, there was a sense of dazedness in his eyes.

"That's a very powerful Blue Star Beast, this time, we may really have a hard time getting through!" Lan Xing'er couldn't help but sigh.

The reason why Yu Tianxiao and Lan Xing'er felt dazed and scared at the same time was because the Phantom Sea Divine Dragon was an extremely terrifying, extremely difficult Blue Star Beast that lived in the ocean.

This Phantom Sea Dragon is not only rare, but also extremely powerful, the attack and defense capabilities are very amazing, and the dragon ball he produced himself is a priceless treasure, it can be said that it is definitely a treasure that is difficult to buy even with money.

Since this Phantom Sea Divine Dragon is a Blue Star Beast in the water, it is really difficult to catch it and kill it, that is to say, this time, Yu Tianxiao and Lan Xing'er really encountered a strong enemy.

"No matter how difficult it is, we have to break it! Okay Xing'er, don't think about it anymore, let's go find the Phantom Sea Dragon! "Say, whoosh! Disheveled! Yu Tianxiao was the first to plunge into the blue turbulent sea in an instant.

Subsequently, whoosh! Disheveled! Lan Xing'er also immediately followed and plunged down. Immediately after, there were only two small splashes on the turbulent sea, and then it completely returned to its previous appearance, with rolling waves and the sound of waves.

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