Of course, the originally faint black lightning leopard also disappeared, replaced by a solid lightning leopard that was surrounded by seven-colored halos. It similarly resided in the air with great might, causing the entire Duo Lun Duo City to be stunned.

The entire city, and even the surrounding several kilometers away, had been emptied of crystal energy. It was hard to imagine just how terrifying the crystal energy contained within these two tyrannical exotic beasts.

At this moment, everyone was paying attention. Everyone in the city, even some mutated beasts in the surrounding area, high-grade Corpse Race, were staring at the exotic beasts in the sky.

“Ang …!”

“Roar …!”

Just as everyone was watching, the dragon roar in the sky shook the heavens. The tiger leopard thunder rang out, and the two exotic beasts began to shrink rapidly amidst the sudden howls of the tiger leopard.

Under the terrifying sonic boom, the sound of glass shattering could be heard endlessly. In the entire city, there was practically no complete piece of glass…

Moreover, in order to avoid the resplendence of the demonic sound, many people immediately hid in their rooms and closed the doors and windows…

In fact, some low-grade mutants and new humans began to circulate their crystal energy to resist this terrifying sonic boom.

The howls were still the same. In a moment, the beasts that had originally enveloped the sky had already condensed into two beasts the size of passenger planes, carrying a dense seven-colored halo.

Then, under the attention of countless powerful new humans and mutants, the smaller Tyrannosaurus rex and Demonic Leopard of Thunder shot down at an extremely fast speed.

It was as if two gigantic stars, carrying seven-colored tail flames, had fallen into the distant horizon…

The stars fell, and in an instant, the dragon roar and leopard roar. The world changed color, and the entire mining area was rendered into a colorful divine mountain.

However, at the same time, the two terrifying auras began to slowly retract and disappear after they fell.

In a short moment, it had completely disappeared from the senses of many mutants and new humans…

At the same time, near the mine, Yifan and Xing Jie, who had originally closed their eyes tightly, opened their eyes at this moment.

“Brother Fan, this potion is heaven-defying. It’s only been ten days. We actually managed to advance by relying on it …!”

As soon as she opened her eyes, Xing Jie cheered happily…

Apparently, Xing Jie’s sister had successfully broken through to the seventh level…

Seventh Grade, that was a breakthrough to the realm of Advanced Evolution. Crystal power and body evolved again, condensing a seed crystal…

In addition, every move could trigger dark energy bonuses from the outside world. Some experts even had the ability to shake space.

As for Yifan, he naturally broke through to the eighth stratum as he wished…

Tier 8 was already a mid-level Advanced Evolution Realm cultivator. Not only had he perfected the crystal seed, his body, and the use of crystal energy, he had also matured. When some experts raised their hands, they could already shatter the void.

For example, even though Yifan had only gently moved his fingers, the invisible space between his fingers had already revealed a few tiny cracks.

One had to know that this state was the result of him trying his best to control it…

At this moment, when Yifan heard Xing Jie’s words, he immediately laughed and said, “Yeah, this is the first time I’ve used this potion. I really didn’t expect it to be so effective.”

“Congratulations, you’ve finally advanced to the seventh rank …!”

Hearing this, Xing Jie said happily, “Haha, thank you, Brother Fan. Jier also wishes to congratulate you. You’ve finally completed your abnormal advancement and stepped into an unprecedented eighth level …!”

“However, even though we’ve advanced, we haven’t completely absorbed all of our crystal energy. What should we do next? Should we leave seclusion or remain in the consolidation realm?”

Hearing this, Yifan pondered for a moment, and then said seriously, “It would be too bad for you to come out of seclusion like this.”

“I mentioned before that although the potions we use are not precious, they are still rare.”

“Since there is a lack of crystal energy here, let’s temporarily leave seclusion and continue in another place. On the one hand, we can stabilize our cultivation realm, and on the other hand, we can make the most of it.”

Hearing this, Xing Jie immediately smiled brightly, “Haha, this is good. Such a good potion. It would be a pity if it wasted its effectiveness. It would be heaven’s punishment …!”

Hearing this, Yifan did not have any more ink. He immediately said, “Then pack up and leave.”

After Yifan finished speaking, the two of them quickly tidied up the formation and disappeared into the small rock mountain…

As the two of them left, the Little Rock Mountain immediately lost its mysterious colors and turned into an ordinary small mountain.

A long time later, in Yifan, half an hour after Xing Jie and the other two left, the two leaders appeared in Little Rock Mountain…

Of course, this time, apart from discovering a strange natural cave, they didn’t find anything meaningful…

However, after discovering that the other party had truly left, the two leaders finally heaved a sigh of relief.

After all, regardless of what the creatures in Little Rock Mountain were, the pressure they brought was too great.

This pressure was so great that it made them suffocate…

One had to know that it was just a sound. In many cities, that shocking scene had already caused their hearts to go cold.

At this moment, when they discovered that the other party had left, their hearts were filled with fear and happiness. It could be said that they were filled with mixed feelings.

As for the four people in the mine, they were still sitting steadily on the Diaoyutai, trying their best to conceal their aura throughout the entire journey without any unusual movements.

Even if they discovered that Yifan and Xing Jie had disappeared, they weren’t worried at all…

Because they clearly knew that the two already invincible adults had advanced once again…

With such strength, no one in North America would be able to pass through the hands of the two of them…

So, all they need to do is complete the mission that the two of them have given us…

Since the two of them hadn’t explained anything else, there was naturally no need for them to interfere…

Xiao En, Tasha, and Anna were also quite calm. They didn’t even have the chance to examine them. They just studied Yifan’s techniques more diligently.

…

…

Time passed in a hurry, and in the blink of an eye, it was another half month…

‘Ding … Ding … Ding … Ding … Ding … Ding … Ding!’

In the space of the mine, the sound of metal striking was endless, and two figures, a man and a woman, were clashing at top speed.

The man wielded a horizontal saber and the woman wielded a broad sword. Neither of them had any crystal energy fluctuations. It seemed that they were only relying on their physical strength to fight.

Clang!

With a loud explosion, the woman was forced back by a knife. Then, before she could adjust herself, a horizontal knife was already placed across her neck…

At this point in the battle, the outcome was already determined. The woman immediately said with a little dissatisfaction, “Xiao En, this is too fair. I’m not convinced…”

“The terrain here is narrow. My speed advantage and the Spirit Wood Windward Sword are unable to display their full power. We’ll compete again after we get out of here!”

The man, Xiao En, was quite open-minded and said, “Well, under such a terrain, it is indeed a bit disadvantageous to you.”

“However, there is no denying that the power of my Melting Flame Slash is truly tyrannical …!”

“After we leave, let’s completely liberate the crystal energy and have a good battle …!”

After saying that, the woman was also Anna. She immediately smiled and said, “Alright, when we get to the open land, I can see that you and I are fighting against each other …”

After saying that, the two of them immediately put away their weapons and walked towards Tasha and Dennis.

In fact, for Dennis, these ten days and months were extremely torturous, and he was extremely regretful at this moment.

Why was it that when he saw the Rock Emperor, the request he made wasn’t to join, but to have space…

Right now, after witnessing his opponent’s cultivation system, he suddenly felt that his current cultivation system was dog shit.

What meditation, what automatic growth, what mechanical transformation input, in front of the opponent’s independent cultivation, all of them were dog shit…

At this moment, he was extremely eager to possess such a cultivation technique, even if it was the shallowest and most basic one.

One must know that no matter how shallow a cultivation technique is, it is still an independent cultivation technique. It can actively absorb free energy and absorb crystal energy within a crystal core…

Compared to those stupid advancement methods he knew, it was countless times more brilliant…

However, it was a pity that since he had the opportunity and time, the three people in front of him, who were already completely familiar with him, could not teach him cultivation techniques.

Because he didn’t belong to the Heavenly Rock Sequence, without the orders from the higher ups, Xiao En and the others didn’t care about randomly spreading nonsense…

Moreover, this was still under the eyes of the Rock Emperor, so the three of them didn’t dare to act recklessly.

As for Dennis, seeing that the three of them were cultivating various high-grade techniques, his intestines were already green with regret.

“Xiao En, this Melting Flame Slash of yours is meticulous but not overbearing. It suits your personality quite well. It is indeed extraordinary …!”

After the two of them approached, Tasha, who was watching the battle, sighed in admiration and confirmed Xiao En’s battle prowess.

Hearing this, Xiao En immediately said, “That’s not true. This is a cultivation technique personally chosen by Lord Rock Emperor for me.”

“It’s not just me. Aren’t your cultivation methods also tailored to your needs?”

“It has to be said that even though Lord Rock Emperor has barely met us, he can still see through all of us with a single glance!”

“In that case, you should understand …!”

Hearing Xiao En’s words, Tasha and Anna’s eyes flashed with light. They clearly understood the meaning behind these words.

At this moment, dots of light suddenly appeared on the right side of the four of them, and before the four of them could react…

A man and a woman silently appeared…

Still, Xiao En’s reaction was the fastest. It was almost the same as the moment Xing Jie appeared in Yifan, she immediately knelt on one knee and said solemnly.

“Congratulations to Lord Rock Emperor and Lord Mei Wu for returning. Congratulations to Lord Rock Emperor and Lord Mei Wu for both advancing …”