Or, if you can call it a head. At the top of one end of the [Rock Drilling Beast], there is only one large mouth, which is ring-shaped, and between biting and wriggling, you can see barb-like fangs, which makes people creepy.

Sun Yan finally understood why Lao Zheng said that the most powerful thing about the [Rock Drilling Beast] was that mouth.

The mouth was aimed at Sun Yan in the air, swaying slightly, and the barb-like fangs were constantly intertwined, as if to determine his specific position, and immediately, with a snort, he opened his huge mouth and bit at the young man.

As soon as his body moved, Sun Yan had moved more than ten meters away, only to hear a bang, where he was standing just now, it was directly penetrated by the [Rock Drilling Beast], and the ground cracked one by one. Immediately after, the horrible beast's long body wriggled and burrowed into the ground.

In the blink of an eye, there was a bang, and 2 meters away from Sun Yan's face, another hole exploded, and this [Rock Drilling Beast] rushed out and attacked the boy again.

"Damn! this guy has such a keen sense?" Sun Yan was startled, he had obviously reined in his body's qi, and he moved silently, and he was actually determined by this monster's exact location.

With his feet moving slightly, Sun Yan moved 20 meters silently again, his shoulders sank slightly, and his fists flashed with the light of Yuan Li, ready to launch a counterattack.

However, before he could make any moves, this [Rock Drilling Beast] moved faster, burrowing into the ground again, breaking through the ground, chasing Sun Yan's figure, without stopping, like a maggot attached to a bone.

"Humph!"

Sun Yan frowned slightly, this time he didn't move short or medium distances, only straddling with his right foot, flashing sideways to the side of the [Rock Drilling Beast], his right fist went straight through, and the [Tiger Killing Kill] was launched, and it exploded out.

Bite...... , with a crisp sound.

The light gold fist marks were in the air, smashing into the [Rock Drilling Beast], but it only made the monster's long body tremble, and the huge mouth on its head turned, bent into 360 degrees, and quickly bit towards Sun Yan.

"Damn! This guy's skin is too thick. Sun Yan was taken aback, and the [Tiger Killing Kill] that contained Ge Jin's true intentions did not cause any damage.

Moreover, the skin of the [Diamond Beast] is obviously extremely tough, but it can be folded in half 360 degrees, as if it is a soft troll.

In the face of the hideous and angry giant mouth, Sun Yan no longer evaded, the light of the Yuan Force of his whole body suddenly appeared, stepping on the [Zhenlong Pile], stepping on the [Hurricane Step], his palms spread, and the layers of palm shadows spread out, converging into a palm curtain in the sky, and shooting straight towards the [Rock Drilling Beast].

With Sun Yan's character, he always doesn't like to take detours when fighting, opening and closing, and hitting hard, that's his style.

Knock knock knock...... , layers of palm shadows slapped on the head of the [Rock Drilling Beast], making a muffled sound one after another, but it still did not cause any damage.

On the other hand, Sun Yan flew out upside down, and his body drew an arc in mid-air, removing the power of the shock, so that he could stand firm.

"Grandma is a bear, and even the hot sun and extreme cold fist intent have no effect. The skin of this [Rock Drilling Beast] is really invulnerable, thicker than the city wall. Sun Yan secretly scolded.

Just now, he used the offensive of [Sea Swallowing Palm], and he integrated the two martial arts true intentions of the hot sun and the extreme cold, one hot and one cold, one yang and one yin. Once such a palm force hits the target's body, it is mixed with cold and heat, causing extremely strong destructive power.

After comprehending the true meaning of martial arts, it is not difficult to challenge beyond the level. Not to mention that Sun Yan comprehended several martial arts true meanings, coupled with his terrifying fighting instincts, his combat power was so strong that even an ordinary seventh-level martial artist was not a Shihe general.

However, when Sun Yan's [Sea Swallowing Palm] hit the [Rock Drilling Beast] with all his might, it sank into the sea like a stone, not only did it not cause any damage, but it had a strong anti-shock force.

However, this is also the horror of the beast. It is precisely because of the special body structure, abilities, etc., that people smell like that.

Knock knock knock...... After being attacked by Sun Yan in a round, the ferocity of this [Rock Drilling Beast] was aroused, and it drilled around the surroundings, drilling the ground in front of the entrance of the underground camp into a thousand holes, and the debris was splashing everywhere, and the sound was extremely terrifying. The long body burrowed in and out, and the hideous huge mouth took one bite left and one right, and kept biting down on the young man's head.

In the face of the rapid attack of the [Rock Drilling Beast], Sun Yan also burst into flames, stepping on the [Hurricane Step], a cyclone flew quickly, and the [Sea Swallowing Palm] shot out wave after wave, like the waves of the sea, surging.

Xi has [Zhenlong Pile] and has cultivated [Optimus One Pillar Gong], Sun Yan's inner yuan is extremely long, and it is most suitable for protracted battles.

Layers of palm shadows are stacked, this line of palm shadows is either light gold, or blue, or orange, overlapping together, like a peacock opening the screen, dazzling.

Bang Bang ...... , one after another palm wind imprinted on the huge body of the [Rock Drilling Beast], although it could not cause substantial damage, but it also made it suffer a lot, and the action of burrowing into the ground became more violent.

For a while, the entire surface camp was filled with smoke and dust, and waves of air rose into the sky, only to see a small figure surrounding a behemoth, constantly tossing and turning, and the palm shadows were intertwined into a net, trapping the [Rock Drilling Beast] in it.

Suddenly, another violent loud noise came out, and the ground of the entire camp collapsed one layer alive, and it was actually drilled by the [Rock Beast] to level the rock layer with a thickness of more than 30 meters.

In the deep rock formation, a black shadow jumped lightly on the large rock, and when all the dust settled, Sun Yan fell to the ground, and opened a hundred meters away from the [Rock Drilling Beast] in front of him.

This [Rock Drilling Beast] couldn't attack for a long time, and it seemed that it had taken a lot of effort to retract into the original rock passage, and the turtle couldn't shrink out. Only a grinding tooth sound loomed, indicating that the monster had not left, and was still lurking in the passage, ready to come out and devour people.

Standing not far from the entrance of the underground camp, Sun Yan stood still, stepping on the [Zhenlong Stake], a thick and soft force flowed into his body from the soles of his feet, quickly making up for the loss of Yuan Force.

"Damn, is this [Rock Drilling] made of kraft candy? It's so difficult that no matter how hard you fight, you can't do any real damage. Sun Yan scolded in his heart.

The battle just now lasted for 30 minutes, and no matter how much Sun Yan attacked with all his strength, he still couldn't break through the [Diamond Beast's] defense. Otherwise, even 100 [Rock Drilling Beasts] would all be corpses by now.

This feeling of being powerful and having nowhere to do it, is quite aggrieved!

Looking at the deep passage in the distance, a coldness appeared in Sun Yan's eyes, and he said secretly: "Since the [Sea Swallowing Palm] and [Tiger Killing Kill] don't work, then I have to use the [Floating Light Earthquake Heaven Technique] to work with one blow!"

The reason why he didn't use the [Floating Light Earthquake Heaven Technique] at the beginning was that Sun Yan wanted to continuously improve the [Hurricane Swallowing Sea Technique] through actual combat, which was a commitment to Wind Chime Snow.

Meditating and purifying, Sun Yan slowly emptied his thoughts, locked the [Rock Drilling Beast] in the deep passage, and prepared to give a killing blow immediately when this monster came out of the cave again.

At this moment, Lao Zheng's voice came from his ears, "Xiao Yan, have you seen the power of the [Rock Beast]?"

Although the voice was light, it was extremely clear, as if he was talking beside him, Sun Yan's heart moved: Gathering Yuan into a line, Lao Zheng is really the strength of the eighth-level martial arts realm or above.

If a martial artist wants to condense the inner element into a line and send it to the ear of the target, he must reach the eighth-level martial realm, and the inner element communicates naturally and converges into the Great Zhou Tian to have such strength.

Hearing Lao Zheng's voice, Sun Yan didn't have the gesture of gathering yuan into a line, so he could only make a gesture from afar.

Then, Lao Zheng's voice sounded again, with a playful smile: "Actually, from a biological point of view, [Drilling Beast] belongs to the animals of the oligochaeta class of the Annelids phylum. What are the representative animals of the oligochaetes of the phylum Oligochaeta of the Know-Dao Dao Phylum?"

Grandma is a bear, Lao Zheng, what do you want to say?

Standing there, Sun Yan gestured, fiercely despised Lao Zheng's behavior, and expressed his indignation.

"Hehe, young people should dabble in many aspects of knowledge, so that they can touch the bypass!" Lao Zheng teased again, and continued, "As for the representative animals of the Oligochaete class of the Annelida phylum, you must know the Tao when you say it, that is the earthworm." After all, this [Rock Drilling] and the earthworm should be considered close relatives!"

Damn, earthworms? are they close relatives?

Sun Yan scolded wildly in his heart, he gestured and signaled Lao Zheng to fart quickly, otherwise shut up.

"Hehe, young people, don't be impatient!" Lao Zheng teased again slowly, "[Rock Drilling Beast] This strange beast is covered with a thick layer of cuticle, and it has extremely strong defensive power. In addition, the body structure of this alien beast is composed of cartilage segments, surrounded by a thick stratum corneum on the body surface, which can disperse the external damage received to each cartilage, weakening the external attack power to the greatest extent. This cartilage structure, also known as the soft spine, is now a kind of elemental fighter of the Odin Star Domain Military Department, which is inspired by the body structure of the [Rock Drilling Beast]. ”

Grandma is a bear, Lao Zheng knows a lot, and he is worthy of being a lecturer at Storm Academy, a teacher, and a well-dressed beast!

Well, wait, the body structure is made up of knots of cartilage?

Thinking of this, a flash of inspiration flashed in his mind, and a thought was formed, Sun Yan's eyes couldn't help but light up, and he immediately grasped the weakness of the [Drilling Rock Beast].

After thinking for a while, Sun Yan took a step forward and strode towards the deep passage in the distance, this time, he wanted to take the initiative.

As soon as he walked not far from the deep passage, suddenly, there was a slight vibration from the ground, and the next moment, the ground raised a slope, and then it exploded, and this [Rock Drilling Beast] roared out.

"It turns out that the retraction channel to restore strength is fake, in fact, it is to secretly cross Chen Cang. Hmph, the high-level alien beasts are really cunning. ”

The footsteps were staggered, and Sun Yan swept to the side of the [Rock Drilling Beast] like a swimming fish, and the palm shadow in the sky shot out, attacking all parts of the monster's body. In the blink of an eye, Sun Yan slapped more than 100 palms, alternating between the hot sun and the extreme cold, swaying naturally and incomparably freehand.

After this round of attack, Sun Yan immediately retreated, his body flashed, and he retreated to a hundred meters away, staring at this [Rock Drilling Beast].

This time, this sixth-level alien beast did not pursue again, and its entire body maintained its previous attack action, bending into an arc in mid-air, motionless, and without a single sound.