Su Chen practiced in the system space for two and a half years, and when he returned from his studies, Su Chen's level was further improved.

[Host: Su Chen, Rank: Lieutenant]

Su Chen was successfully promoted to lieutenant, and the inverter value in his body was also consumed, and the system instilled the inverter value into Su Chen, which was only a part of the friendship, which reduced the pressure on Su Chen's promotion.

It's just that Su Chen was promoted this time, and there was no reward, because the system instilled too much inverter value into Su Chen, and the inverter value in her body was also consumed, and she fell into a silent period and upgraded the system again.

[Ding, the system prompts, the system is about to enter the upgrade hibernation period, please pay attention to the safety ...... during the system upgrade period]

Su Chen was promoted, full of momentum, Su Chen burst out with a strong aura in the same place, and within a radius of several miles, he could feel Su Chen's strong coercion.

Feeling the abnormal movement of the energy on the earth, the real king of this realm, the iron-backed earth dragon, was awakened by Su Chen's power!

"Roar!"

A heavy dragon groan was heard, waking everyone in the base.

Su Chen was also shocked by this dragon groan.

"Could it be that there are really dragons in this world? It's not good, go and ask Lu Mingfei! ”

In order to ensure the safety of everyone in the XS base, Su Chen had to personally come forward to check, and after Su Chen's preliminary judgment, the roar of the dragon should have come from the cave, so Su Chen took a team of people and horses and prepared to enter the cave to explore.

"Later, no matter what you see, don't act rashly, listen to my command!"

Su Chen said earnestly.

"Yes, Star God!"

The terrain in this cave is intricate, even Su Chen is in danger of getting lost when he enters, but fortunately he has a terrain detector designed by his pocket, Su Chen and the others have a complete topographic map of this cave, so they did not lose their way in the cave.

About to enter the depths of the cave, Su Chen stopped everyone's footsteps.

"Everyone, listen to me, according to the deterrent power of the roar, the enemy inside should not be simple, so everything must be done carefully, if you continue to explore, I am afraid that something unexpected will happen, if you are willing to follow me, follow me in, and if you are not willing to risk yourself, stay in place and break behind!"

"Yes!"

Su Chen took a small team of people and horses to continue to explore the cave, and the other team of people and horses stood still and stayed in place, Su Chen's arrangement is also very good, it can not only protect everyone, but also have one more guarantee, how to say? Su Chen's arrangement is undoubtedly the most suitable!

Inside this cave, there are bones everywhere, obviously, the things inside are not simple, these bones, there are new and old, new and old stacked, have been piled up into a mountain of bones, piled up here. There was inevitably a fierce battle ahead, Su Chen stepped forward with a double sword to cut the wind, brave Chenchen, not afraid of difficulties!

The breath of carrion forced everyone to breathe, and everyone held their breath and continued to move forward, they must explore this cave, not only for their safety, but also for the safety of the entire XS base!

"Star God, you say, what will be in front of you?"

"Don't ask, I don't know, but we have to face it! Su Chen said righteously.

Everyone was inspired by Su Chen, and they also let go of their fears and strode forward.

Su Chen saw that everyone was so motivated, and he could finally put his mind at ease.

Although there is no system to support Su Chen, Su Chen is fearless, after all, he can't just rely on the system, right?

He Su Chen is the captain of the Star God Squad, the number one soldier king in the past, what kind of wind and waves has he never seen? How could you be frightened by this little difficulty?

Su Chen sneaked into the depths of the cave, and he found that there was a monster with spikes on its back, like Godzilla, roaming......

"I'm going? Godzilla? It's not a country of the sun wheel here, there is no HE radiation, how can there be this thing? ”

It turned out that this was an iron-backed earth dragon, an ancient creature of the same era as the dinosaurs, and he was here a long time ago, but the noise outside was too loud, disturbing his sleep, and the ironback earth dragon was woken up by everyone, and he was very dissatisfied.

"Roar!"

A deafening dragon roar came from a close distance, and the distance was closer, and the deterrent power of the dragon roar was naturally a little stronger, and Su Chen and the others had to cover their ears to defend themselves.

"Damn, this guy, I'm afraid it's not easy to deal with!"

Su Chen also understood that they were not a heavyweight player at all, the iron-backed earth dragon had existed for thousands of years, even an open-hanging player like Su Chen, it was still a little difficult to face a powerful player like him, and besides, this iron-backed earth dragon still had a tendency to evolve into a golden-backed earth dragon......

The iron-backed earth dragon will evolve every thousand years, evolving into a golden-backed earth dragon, and now Su Chen and others have disturbed his evolution, the iron-backed earth dragon is dissatisfied, he himself has a strong sense of territory, as a party overlord, he does not allow others to infringe on his territory, not to mention that in the important joint of his evolution, there is no room for mistakes!

"Roar!"

(Damn humans, dare to trespass into my territory!) ）

Except for Su Chen, everyone who was brought in by Su Chen was dumbfounded, these two dragon roars shocked their scalps, although Su Chen was also shocked, but his dignity did not allow him to fall.

Su Chen intends to negotiate with the Ironback Earth Dragon in an attempt to establish an equal contract with him.

"I'm sorry, we didn't mean to offend you, if you can let us go, we won't embarrass you, how?"

"Hehe, hypocritical human beings, are not worthy of negotiating terms with our great dragon clan, let me bury myself here!"

The iron-backed earth dragon didn't give Su Chen and the others a chance to negotiate at all, and Su Chen saw that there was nothing to talk about, so he had to bite the bullet k3r all of a sudden!

"Since you don't have to talk about it, then it's offended!"

The iron-backed earth dragon slapped it with one claw, wanting to shoot Su Chen into a meat patty, but in this small space, it was very inconvenient for the iron-backed earth dragon's body to move, Su Chen used a sliding shovel to dodge this blow very skillfully, Su Chen occupied an absolute advantage, and naturally wanted to seize the opportunity to counterattack.

Su Chen combined the two swords of the Wind Slashing Blade, and slashed off one of the spikes of the Ironback Earth Dragon, and the Ironback Earth Dragon wailed in pain.

"Damn the Terrans, we Dragons will never give in!"

The iron-backed earth dragon resisted and flew Su Chen, and then, his entire momentum changed, and the body of the iron-backed earth dragon began to transform rapidly, and the spike he had been cut off also grew back.

The ironback earth dragon is forcibly evolving, this way of evolution, taking risks, the slightest change, he may fail to evolve, but if it succeeds, the ironback earth dragon will evolve into a golden-backed earth dragon, or even evolve into a real dragon for the second time!