The heat within the Heavenflame Stones was constantly being replenished, and Elder Big Drum and the others took out all sorts of treasures to increase the temperature. The temperature in the city continued to rise, and the cultivators who had not reached the space-exploring realm could no longer withstand it, so they all retreated.
The city's original walls had also been touched by others, and many of them had already disappeared.
Very few people noticed that the walls that had disappeared had not been reduced to ashes, but had simply disappeared.
The Heavenflame Stones were the source of the fire dragon's power, and the fire dragon could slow down Red Madam's attacks. It also cooperated with the Heavenflame Path Master to deal with the powerful Imprinter, so the amount of heat it could generate was unimaginable.
Lu Yin could only open the door bit by bit to tempt them. If he had not thought of this method, he would not even have been able to find the heat.
Meng Tianlong, Mu Nichang, and the experts of the Great Eastern Alliance all took out items that could increase the temperature. Everyone knew that the Great Eastern Alliance had been searching for an ancient flame seed, but they had not exposed themselves.
Lu Yin did not blame them, as they were not his subordinates. They were just working together to obtain what they needed. Furthermore, the alliance was not completely voluntary, so it was normal for them to not cooperate with him.
More than ten days later, the door was still only slightly open. Although the gap was very small, it still gave everyone hope.
"This is the door to an ancient inheritance, and it must be Senior Gu Yue's test. The heat that we're looking for is not enough. If you have more, then don't keep it to yourselves," Elder Big Drum shouted.
Just as he finished speaking, Elder Novak appeared. He had actually been here for a long time, but he had not shown himself.
Elder Big Drum was not surprised to see him, as they were all elders who were not valued by the Hall of Honor. Although they all had power levels of more than 300,000, they were actually considered the weakest amongst those in the same realm. Otherwise, they would not have been in the Outerverse. If they wanted to return to the Neoverse, they would need to increase their strength.
Elder Nuohua raised his hand, and there was a white powder-like object in his palm. He casually waved it, and what gushed out was a white, blazing heat. In an instant, it suppressed the extreme heat of the others, causing the void of the small city to distort.
This heat was something that even powerhouses with power levels of 400,000 feared.
Not too far away, Yue Mavis walked out and pulled out an incomplete sourcebox from her cosmic ring. She then tossed it at the door, causing a strong gale to sweep through the area and shatter the sourcebox's surface. A torrential heatwave surged out from the sourcebox like a reverse waterfall, incinerating space itself. Everyone who was watching from afar trembled in fear, and even Elder Bigdrum and the others who were closest to the sourcebox were forced to continuously retreat.
"A high temperature that's enough to threaten an Envoy-level powerhouse. The Mavis family is indeed rich," Yu Mu praised.
Yuehua Mavis looked at him. "Shamrock Enterprises isn't weak either."
Yu Mu smiled and took out a fiery red fruit. The fruit looked ordinary, but there was a flame brand on the surface. It was a strange fruit that Shamrock Enterprises had found on a planet. It was so hot that even Yu Mu didn't dare to eat it. He had originally planned to research and create a medicine, but right now, there was nothing more important than Gu Yue's inheritance.
Jasper Mountain Sea took action, throwing out more than ten treasures that were related to high temperature flames. There were even exotic treasures among them, causing quite a few people to be stupefied. Everyone said that the Million City was rich, and now they had seen it for themselves.
Behind the door, Lu Yin was ecstatic. The temperature outside suddenly rose, and this time, the door was truly roasted red. The Heavenfire Stone glowed brightly.
Lu Yin knew that this was the constant replenishment of the high temperature, but the people outside thought that it was a sign that the door was about to open.
"Hurry up, we're almost there," Elder Big Drum said anxiously.
Lan Si walked out and took out two round stones. They collided with each other, producing lightning that transformed into flames in the void. The temperature was even higher than the powder that Elder Novak had provided, and it was extremely close to the fruit that Yu Mu had taken out.
Xuan Jiu also came over. No one knew how someone who hadn't even reached the Explorer realm could approach such high temperatures. It had to be said that his attire was quite intimidating, and he gave off the feeling of an otherworldly expert who was playing around.
Even Elder Big Drum was intimidated, and everyone looked at him.
Xuan Jiu stared at the door for a while before shaking his head and muttering something to himself. He then turned around and left.
Right after Xuan Jiu left, the black Undying Bird swooped down from the sky towards the door. The Dark Phoenix people also appeared. They were experts at playing with fire, and their addition greatly boosted the confidence of many.
Someone sighed. "If the Dark Phoenix Ancestor isn't dead, then this door should be able to open."
This sentence caused the faces of the Dark Phoenix experts to darken.
The Dark Phoenix Clan was one of the three great powers in the Outerverse that could not be provoked. They had fought their way out of the Innerverse because of the Dark Phoenix Ancestor's fame, and they were fearless. However, after the battle at the border, their ancestor had died, and they had become much more low-key. Their way of doing things had completely changed, and this was a source of pain for them.
They hoped more than anyone that the Dark Phoenix Ancestor was still alive and not remembered by others.
As time passed, another group of experts arrived one after another, and all sorts of high-temperature flames were thrown towards the door as if they were worshipping the ancestor.
Twenty days later, Lu Yin moved his arms. It was time to cultivate.
The door was opened slightly, and he could barely see it with his naked eye. He didn't care about what happened next. It would be best if these people had high-temperature flames, but if they didn't, then he would wait until he was done with his cultivation.
As he thought about it, he waved his hand and threw a pile of star essence onto the ground. Lu Yin touched the Heavenflame Stone with one hand and felt an intense burning pain in his palm. The high temperature spread through his body through the Heavenflame Stone, and his gaze became resolute as he began to absorb the star energy.
There weren't many people in the entire universe who possessed such a cheat-like method of absorbing star energy, but once one mastered it, they would not be able to quit. Who would be willing to slowly absorb star energy?
The last time he had used the Heavenflame Stone, he had completed four cycles. This time, he wanted to completely break through to the Cruiser realm. As long as the people outside supported him, he might even be able to reach an even higher realm.
No one would have thought that more than half of the Outerverse's experts would go to great lengths to provide Lu Yin with all of their high-temperature treasures for his cultivation. Perhaps none of them would have known about this in their entire lives.
The Explorer realm was above the Explorer realm. After four cycles of star energy in one's body, one would reach the peak of the Explorer realm, and after five cycles, one would become a Cruiser.
Four cycles and five cycles did not seem like much of a difference, and the only difference was the amount of star energy contained. However, the human body had its limits, and every cycle would expand the limits of one's body. In the ancient handbook, a powerhouse had described the human body as a balloon. If it was filled to the brim in one go, then it would explode. It had to be filled to the brim, and then the balloon had to be strengthened to increase its toughness before it could be filled again.
This was the so-called star energy cycle. It allowed one to adapt to the universe, resist exhaustion, and increase one's strength. The star energy cycle was the most precious cultivation method that had been passed down since ancient times, and it was unique to humans.
Astral beasts were different. Their potential was enough to allow them to reach a certain level, and they did not need to slowly rotate their planets to complete the cycle.
The human body was very mysterious. Four cycles would slowly strengthen one's body, and once the fifth cycle was completed, there would be a subtle sublimation. Regardless of whether it was one's physical strength, reaction time, five senses, or even one's comprehension, everything would increase. This was the reason why the Cruisers were differentiated from each other.
There were indeed differences between Explorers and Cruisers, and the difference lay in the sublimation after five cycles.
Otherwise, there would be no need to differentiate between Cruisers if they both cycled star energy.
Based on each person's differences, the amount of improvement after five cycles would be different. Some people would improve very little, and their strength would be limited. Others would improve greatly, and their strength might even double. This naturally included an increase in comprehension, as well as an increase in their comprehension of battle techniques and innate gifts.
Lu Yin was currently on his way to completing five cycles.
The amount of star energy he needed to cycle each cycle was two hundred times that of a normal person's, which meant that his limit was also two hundred times that of a normal person's. This was also why he could jump realms to fight against powerhouses; his physical body was different from a normal person's.
He could be considered a different kind of lifeform, and even the Ten Arbiters were much stronger than normal people.
A month later, Lu Yin was still cultivating and did not have the time to bother with the door. The crack in the door was exactly the same as it had been a month ago.
This made the people outside anxious, as they had already squandered too many treasures. If they could not open the door, then it would be a huge loss.
"Eh, don't you guys feel that the closer we get to the door, the more abundant the star energy is?" an Enlighter asked in surprise.
Only then did the others realize that their attention had been drawn to the door, and no one had paid attention to the star energy.
When this person said this, the crowd realized something.
"Quick, increase the temperature. There's definitely something good behind the door," someone said excitedly.
Everyone else was excited, as the abundance of star energy meant that there were definitely treasures behind the door.
Even Lan Si was looking forward to it, as the mystery behind the door was too attractive.
Lu Yin had used a Heavenflame Stone to burn star essence, which produced an abundance of star energy that flowed out through the crack in the door. This caused the people outside to misunderstand. Even if the door did not continue to open, did they still have some motivation?
Immediately, quite a few people threw in high-temperature items in an attempt to open the door.
Elder He had been here before. As an Emissary in the Outerverse who was second only to Master Yuan, no one had noticed his arrival. After observing for a while, he determined that this was not some Gu Yue inheritance, as the architectural style was too different from the era that Gu Yue had lived in. Although the universe was grand and there were many strange architectural styles, he recognized this architectural style; it was the Rune Technology Civilization.
He recognized the pupils that had turned into runes on the door at first glance.
After recognizing that this was the Rune Technology Civilization ruins, Elder He left without a second thought. His understanding of the Rune Technology Civilization was one of the reasons why he had to leave. It was a brilliant and terrifying civilization, and anyone who came into contact with that civilization might vanish at any time.
Even an Emissary like him did not want to come into contact with that civilization.
Whether it was in the open or in the dark, countless people had come and gone.
Soon, another month passed.
The crowd had been burning outside the door for a full two months, but it still did not open. Many people's hearts sank, as they had really tried their best. They had even taken out a high-temperature flame seed that could attract the attention of an Emissary, but they still could not open the door.
Although they were disheartened, their expectations for what was behind the door grew. The harder it was to open, the more it proved that there was something behind it. This was common knowledge.
If the crowd had been ninety percent suspicious of the Gu Yue ruins two months ago, they were only forty percent suspicious now. Only a powerhouse like the Gu Yue could have built such a powerful door, and even the door was so difficult to enter. This showed just how precious the inheritance was.