Zhou Peng found an inn in the Demon City and settled Meng Fanyi and Hei Yan down. Then, an old man wearing a red cloud and black robe with a red skull embroidered on his chest appeared in the inn. Zhou Peng naturally knew what it meant. After giving Meng Fanyi a few words, he followed the old man out. The old man silently led the way in front, not saying a word. Zhou Peng casually followed behind, keeping a certain distance and not asking a single question. The two seemed to have formed an unspoken understanding. Although he didn't ask with his mouth, in his heart, he couldn't figure out what the lord of the Demon City meant by this? After thinking about it all the way, Zhou Peng still didn't understand. But his brows slightly relaxed. Secretly thinking in his heart, "If it's a blessing, it's not a disaster. If it's a disaster, you can't avoid it." In this Demon City, if the city lord at the Qiankun Realm really wanted to kill Zhou Peng, probably a single move from the demon shadow could reduce him to ashes. There was no need to call him into the iron tower. In the Demon City, the city lord's mansion is a soaring giant tower. The tower is black. The material seems to be black iron. Jet-black and shiny, exuding a faint evil aura. The tower body pierces straight into the sky. Looking up, it's impossible to see how high it is. It seems to stand from the sky. Extremely majestic. Zhou Peng deliberately touched it lightly. He was shocked. His whole body couldn't help shivering. It was as cold as piercing bone, as if it were a thousand-year-old ice. He had no idea what material it was. Looking closely again, there was a faint halo on the black tower surface. This reminded Zhou Peng of the barrier in the hegemony battle. Secretly amazed. Although he didn't understand, but in his heart, he was very certain that this giant tower was very extraordinary. Walking into the tower, it was pitch-black and he couldn't see his fingers. It was completely dark, as if it were isolated from the world. It was empty. As if it were another space. Zhou Peng was at the sixth level of Tempering Gangqi. Even at night, he could see a hundred meters away. But now he couldn't see any objects. It could be seen how huge the tower was and there was a mystery hidden in it. Looking up, it was still pitch-black. Except for the old man leading the way, the law of breath couldn't sense any aura. Was there really no one in this empty tower? In his heart, he felt that the lord of the Demon City was extremely mysterious. Not to mention the black giant tower. Just staying in the endless darkness every day made people shiver. Thinking about what if it was really a thousand-year-old demon... "Oh, don't really be a thousand-year-old demon." Zhou Peng's heart sank. Secretly praying. After walking in the darkness for a full half an hour, the old man finally stopped. With a soft sound, he said, "We're here." "Here?!" Zhou Peng was shocked. Looking around with his eyes, there was nothing. He even suspected that he had been walking in circles since he entered the tower. It seemed that he hadn't taken a step forward. Looking at the old man's serious expression, he didn't think it was a lie. "This? Here?" The old man nodded. "Wait here. The lord of the city will summon you in." After saying that, he turned and left without looking back, leaving only Zhou Peng standing stupidly in place. After the old man walked far away, Zhou Peng couldn't hold back anymore. Muttered, "Oh, what's going on here?" There was nothing around. The temperature was getting lower and lower. The cold air hit his body. Zhou Peng couldn't help wondering what kind of person was the lord of the Demon City? Staying in the darkness all day. How ugly must his appearance be! At the Qiankun Realm, it was normal to practice for several thousand years. Even if there was a technique to maintain youth, if he didn't lose his youthfulness, he was probably very ugly, right? The more he thought about it, the less confident Zhou Peng became. After waiting for half an hour and still no one appeared. He couldn't help shouting, "Is there anyone?" In the darkness, there was not even an echo. "Lord of the city, didn't you want to see me?" For a long time, there was still no response. Zhou Peng couldn't help but become impatient. What was this all about? After half an hour, there was still no reaction. The surroundings were so quiet that he could hear his own heartbeat. It was very terrifying. Helplessly, Zhou Peng sat cross-legged. Controlled Yao Kong in the space ring with his intention. Once again used the law of breath to guide the aura in Yao Kong's body. At this time, Yao Kong's face had already improved. Sitting cross-legged with his eyes slightly closed, he relaxed his mind and let Zhou Peng completely control the turbulent flow of aura in his body and slowly guide it out. After a long time, Zhou Peng's mental power was completely exhausted. Sweat rolled down his forehead. Only then did he put away the law of breath. Looking at the fact that he still hadn't been summoned, he started to open the system and refine pills again. "Successful pill refining. Proficiency increased by two points..." "Successful pill refining. Proficiency increased by two points..." "Successful pill refining. Proficiency increased by two points..." ... The system prompts echoed in his ears. Zhou Peng was suddenly shocked. "Proficiency increased by two points? What's going on? Usually it's one point. Why did it increase by two points today?" Frowning, he couldn't figure it out at all. Suddenly, his heart moved. He stood up. With a muffled shout in his heart, "First-level berserk state..." With a loud "buzz", milky white halos slowly seeped out. One ring after another. The ripples spread out until they disappeared in the darkness. The space inside the black giant tower was extremely huge. Zhou Peng could already be sure of this. But now he didn't have the mind to care about so much. He stared at the proficiency of the divine power berserk state. Then his eyes suddenly opened wide. His pupils shrank. Extremely shocked. "Proficiency increased by two points?!" "Getting rich..." "This time I'm really going to get rich." Zhou Peng was extremely excited and overjoyed. In the past, when looking at the long string of zeros after the proficiency, he sighed. The speed of cultivating this skill was too slow. It had been several years. The divine power berserk state was only at level one. The Dragon-Elephanthad only been upgraded by one level. To practice to the great perfection realm, no one knew when it would be. But at this time, he saw a glimmer of hope. There was no doubt that there must be twice the cultivation space in the black giant tower. Zhou Peng was too lazy to think more. Immediately, he continuously released the technique of 'divine power berserk state'. The milky white halos shot out wildly. The black giant tower became a sea of halos. The ripples became huge waves and kept rolling out. But even if the light extended further, it couldn't reach the end. Inside the black giant tower, it was really too big. Looking at the rapidly increasing proficiency, Zhou Peng was extremely delighted. The divine power berserk state was extremely important. First-level berserk state, quadrupling the attributes. Second-level berserk state, eight times the attributes. Third-level berserk state would reach sixteen times the attributes. Continuing on... Thinking of the power erupted by the tenth-level berserk state at the great perfection realm, Zhou Peng couldn't help but be excited. At the great perfection realm, the tenth-level berserk state, two thousand and forty-eight times. What kind of scene would that be? Unimaginable. In his dantian, the crystal cores were continuously releasing and replenishing internal energy. Continuously releasing skills. The internal energy value was rapidly decreasing. Before long, the internal energy value was completely exhausted. Helplessly, Zhou Peng sat cross-legged and rested, waiting for the replenishment of the crystal cores. When the internal energy value rose to half, he started to release it crazily again. Continuously cycling. "Soon. Soon. Haha..." Zhou Peng was extremely excited. The divine power berserk state was about to reach level two. Eight times the attributes. Hahaha... "Boom!" "Second-level berserk state!" "Cool!" Zhou Peng couldn't help roaring. After releasing the second-level berserk state, he was completely different. That powerful force flowed in his body. The berserk aura made him extremely excited and thrilled. "Eight times the attributes. Haha... This is the power of eight times the attributes." "Dragon-Elephant Purgatory!" With a muffled shout in his heart, under the stimulation of eight times the attributes, the Dragon-Elephant Purgatory surged out. The ground under his feet trembled non-stop. The power of the sea of purgatory extended out. The earth-shaking power. In the darkness, a huge dragon's roar roared out. Immediately after, the trampling sound of eight hundred thousand giant elephants was heard. The sea of purgatory set off huge waves. An extremely powerful force was added to Zhou Peng's whole body. As if it was about to burst out of his body. He had never felt such a huge power before. The power of eight times the Dragon-Elephant Purgatory was incomparably powerful. In an instant, Zhou Peng roared wildly. The veins on his arms bulged. A trace of firelight color appeared in his eyes. Immediately after, a series of purple-black auras gushed out from under his feet and filled the entire dark tower... "Buzz, buzz, buzz..." There were bursts of roars coming from inside the tower. Roars stimulated by the aura on Zhou Peng. Deep in the darkness, a pair of eyes full of spiritual energy slowly opened and looked at Zhou Peng...