As the two of them continued to move forward, they couldn't help but get closer and closer to the two lifeforms, and as a result, the energy fluctuations detected by the detector also increased. Soon, the two monsters were displayed on the detector screen, but their exact strength could not be judged from the energy fluctuations, so the two continued to walk forward.

However, when they were still about 200 meters away from those two lifeforms, boom! Suddenly, before the two of them could react to what was going on, a huge beast shadow slammed towards them like lightning.

When the two of them saw this, they didn't have time to think about it at all, whoosh! Sou! They all jumped and flew dozens of meters away at once, and then quickly fell to the ground of the cave. The moment they fell to the ground and stood firm, they couldn't help but immediately look at the huge beast figure.

I saw that it was a monster that was more than twenty meters high, covered with black fur, with four huge beast paws and two huge blood-red beast pupils, and looked like a black bear. Behind the huge black bear-like monster was a much smaller black bear-like monster.

The hair of these two black bear-like monsters was extremely black and shiny, and they also looked extremely hard, and they also shone from time to time, as if steel needles grew on their bodies. At this moment, the tall black bear-like monster still let out a roar and screamed from time to time, and the huge beast pupils were also fierce, but it did not attack Yu Tianxiao and Lan Xing'er again.

Seeing this, Yu Tianxiao and Lan Xing'er couldn't help but be surprised! Seriously, the two of them really didn't expect to encounter such a monster here, and it was definitely the first time they had seen such a monster. There he confronted two black bear-like monsters for a moment. Yu Tianxiao couldn't help but quickly activate the smart arm guard. With the activation of the smart arm guard, I see. In an instant, a blue light suddenly shot out, and then directly shone on the bodies of the two black bear-like monsters.

Honk! An electronic voice sounded softly. The information of the two black bear-like monsters was immediately displayed on the smart arm guard screen:

Black-haired Blood Bear Beast: Beastmaster level, extremely strong in attack and defense.

Black-Haired Blood Bear Beast: A high-level beast general, with average attack and defense.

After seeing these information: Yu Tianxiao and Lan Xing'er immediately understood that these two giant beasts were called black-haired blood bear beasts, one was at the beast king level, and the other was at the high beast general level. Depending on the situation, they are either father and son, mother and son, or father and daughter, or mother and daughter. In short, their relationship is definitely not ordinary, and they seem very close. It's a pity that smart arm guards can only test their strength and name, but not their gender and relationship.

At this moment, Yu Tianxiao and Lan Xing'er could only see the energy fluctuations of these two black-haired blood bear beasts from the detector screen, but they did not find any other energy fluctuations, it was obvious that they did not have blood spirit stones on them, if there were. At such a close distance, the detector will definitely detect it. Seeing this, Yu Tianxiao couldn't help but whisper to Lan Xing'er: "They don't have blood spirit stones on them, let's go!" ”

"Good!" Lan Xing'er also immediately responded.

Then the two of them swished! Sou! Lian turned into two streamers and quickly flew towards the outside of the cave. And the two black-haired blood bear beasts standing there. Seeing that the two human warriors were not a threat to him, he didn't chase them over, but turned around. Let's go to the cave together.

A moment later, Yu Tianxiao and Lan Xing'er came to the outside of the cave. After coming to the cave outside. The two did not make any stops, but quickly flew towards the other caves.

Ten minutes later. Sou! Sou! The two of them flew into a large cave that was taller and wider than the previous one. Before landing at the entrance of this big cave, the two couldn't help but see that this big cave is more than 600 meters high, and more than 300 meters wide, and the depth is endless.

As far as the eye can see, the entire cave can't help but be pitch black and blood-red. It is said that it is dark because the cave is too deep, and it is pitch black inside at a glance, and it is said that it is blood red because the rock of the entire cave wall is blood red, and when the light from the outside shines, it is even more blood-red and dazzling.

Looking at this huge cave, Yu Tianxiao and Lan Xing'er couldn't help but tremble in their hearts. In the past, such a powerful black-haired blood bear beast lived in such a small cave, so now there must be even more terrifying monsters living in this cave of this size.

They didn't fight the two black-haired blood bear beasts before because it was unnecessary, but Yu Tianxiao knew in his heart that if the two of them really fought with the two black-haired blood bear beasts, of course the small one would be fine, but the big one, they were not completely sure to kill it.

Again, when he guessed that they were father and son or father and daughter, mother and son or mother and daughter, Yu Tianxiao couldn't bear to kill them, if it was alone, or if it was two monsters of equal strength, then he would definitely fight with Lan Xing'er and fight it fiercely.

After standing in front of this huge cave for a while, Yu Tianxiao couldn't help but say to Lan Xing'er: "This cave is much bigger than the previous cave, I believe there will be more powerful monsters in it, so we must be careful when we stay for a while, if we encounter the Beast King level or below, we will fight separately, if we encounter the Beast Emperor, or even more powerful monsters, then we will fight together." ”

"Got it!" Lan Xing'er replied softly.

At the beginning, the combined swordsmanship practiced by Yu Tianxiao and Lan Xing'er was the "Yin and Yang Twin Swords Ten Methods", that set of swordsmanship was just an ordinary combined swordsmanship, but even if it was an ordinary combined swordsmanship, it was extremely powerful, and dealing with the Beast King, or even an ordinary Beast Emperor, was like chopping melons and vegetables.

And now they have refined the "Tongshu Heavenly Sword" sword technique that is many times more powerful than the "Yin and Yang Twin Sword Ten Methods". Hence the name, just look at its name and immediately guess that this is a set of combined swordsmanship. It was precisely because he had refined this incomparably powerful combined sword technique that Yu Tianxiao had the confidence to deal with those powerful monsters.

But how vast the universe is, there are countless powerful monsters, such as the famous Starry Sky Divine Beast, which is a powerful monster that lives in the secret realm of the universe. If Yu Tianxiao and Lan Xing'er at this time encountered that starry sky divine beast, even the most ordinary would slap them into meat sauce, and they would be blown away in one breath! Therefore, the current strength of Yu Tianxiao and Lan Xing'er is only relative to the ordinary monsters in a small area.

In this way, Yu Tianxiao and Lan Xing'er quickly entered this huge cave with a height of more than 600 meters and a width of more than 300 meters. Because the cave they entered this time was too big and deep, the two of them directly chose to fly forward. Although they were flying, the speed of the two of them was very slow, and they also turned on the detector at all times, because they wanted to find out if there was a blood spirit stone here.

Although this cave is very tall and spacious, it is very tortuous, about ten kilometers, and twenty or thirty kilometers is a turn. The two of them flew a full distance of forty or fifty kilometers, and did not notice any energy fluctuations, but because the cave was too deep and too big, this distance was nothing at all, so the two did not give up, but continued to fly towards the depths of the cave.

Just when they had flown to a depth of more than a hundred kilometers, finally, the detector detected energy fluctuations. And to their delight, the detector screen showed a triangular prismatic object. That's right, the object that emitted energy fluctuations was none other than the Blood Spirit Stone. The detector showed that the Blood Spirit Stone was five kilometers away from where they were now.

Seeing this, Yu Tianxiao and Lan Xing'er didn't stop any longer, but swished! Sou! Immediately accelerated and flew towards the location of the blood spirit stone.

The distance of five kilometers is definitely in the blink of an eye.

When Yu Tianxiao and Lan Xing'er came to the place where the blood spirit stone was, they couldn't help but be pleasantly surprised to find that the blood spirit stone with a blood-red translucent body and an incomparably beautiful blood-red light was placed on a blood-red big stone. However, the color of that stone was much lighter than the Blood Spirit Stone, so you could see at a glance that the Blood Spirit Stone was placed there.

After seeing the blood spirit stone, I saw that Yu Tianxiao did not hesitate, swished, and flew over, and then reached out and picked up the blood spirit stone, and then couldn't help but say, and put it into his space ring with a brush.

However, just after Yu Tianxiao had just put the second blood spirit stone he had found so far into the space ring, suddenly, he just listened, boom! Rumble! Rumble! The entire cave trembled violently, as if it was about to collapse when an earthquake came. Seeing this, Yu Tianxiao first flew back to Lan Xing'er's side with a swish, and then said to him: "Let's hurry up, there are monsters chasing out, and it seems that the strength is very strong." ”

As soon as the words fell, whoosh! Sou! The two of them quickly turned into two streamers and flew quickly towards the outside of the cave.

As they flew out of the cave together, roar! In an instant, behind them there was a huge, deafening roar, and then, boom! I saw a huge phantom, and chased after Yu Tianxiao and Lan Xing'er desperately. (To be continued......)