Su Chen and Xie Xuanji chatted along the way and soon arrived at the deepest part of the Yin Yang Secret Realm. A black and white door appeared on the wall that was condensed from chaos.
"Senior Brother Xie, I just have to inject Pure Yin and Pure Yang energy into this door to open it, right?"
"That's right."
Xie Xuanji said, "The most difficult part is to fuse the Pure Yin and Pure Yang energy together and inject them into the gate at the same time. Even if I find a Pure Yang Body and a Pure Yin Body at the same time and ask them to inject their energy into the gate at the same time, the Yin and Yang will still be unable to fuse and open the gate."
The requirements are really strict. It seems that there are a lot of good things hidden behind this door.
Su Chen walked forward. Without saying a word, he fused the pure Yin and pure Yang energy together, forming an azure flame that blasted towards the door.
The blue flame did not explode but was directly absorbed by the door.
One could imagine how terrifying the power contained in the flame that could raze a mountain to the ground was. However, after entering the door, it was like a stone sinking into the sea and did not cause any fluctuations.
"Not enough."
Xie Xuanji said.
Su Chen took a deep breath and condensed another blue flame before blasting it out.
Finally, the door reacted and burst out with a faint black and white light.
However, it was still not enough.
In a spurt of energy, Su Chen directly blasted out five azure flames.
"Boom!"
After absorbing enough energy, the door finally opened.
A dazzling golden light shot out from within the gate.
Xie Xuanji didn't have much surprise on his face. With his current status, he was actually not very interested in what was hidden behind this door. To him, opening this door was merely fulfilling a long-cherished wish of the past.
The Sect of Profundity had developed to become one of the top four sects in the Xuanyuan Continent. Even without the treasures behind this door, they could still maintain their strength.
"Junior Brother Su Chen, please."
Xie Xuanji did not let Su Chen leave after using him. Instead, he invited him to enter the door with him.
Su Chen was also very curious about the world behind the door. He reluctantly accepted Xie Xuanji's invitation, and the two of them walked side by side into the golden light.
As soon as Zhang Xuan stepped through the door, the golden radiance dissipated.
Su Chen looked around and saw a huge square space. It was about 500 meters in length, width, and height. It was a standard cube, and it was not surrounded by walls, but a barrier made of light.
An ancient Primordial Qi rushed over.
Su Chen could not help but take a deep breath. This Essence Qi was extremely strong. Su Chen's breathing quickened, and he immediately felt his head start to float.
"It's a little high …"
Su Chen quickly held his breath.
He couldn't absorb too much Essence Qi, otherwise, he would be drunk.
It didn't affect Xie Xuanji at all. He strolled into the cuboid space formed by the barrier. He glanced around and was slightly puzzled.
"It shouldn't be. Why is there nothing here?"
Although Xie Xuanji did not care about what was hidden here, it was still a treasure left behind by the first Sect Master. There should be something here. The first Sect Master would not be so bored as to set up such a difficult way to open the door and only leave an empty room, right?
Su Chen carefully observed for a long time, but he did not find anything either. "Senior Brother, could this Ancient Primordial Qi be the treasure left behind by your first Sect Master?"
Xie Xuanji shook his head. "Although the quality of the Primordial Qi here is extremely high, it's just Primordial Qi. It can't be considered a treasure. There must be something else here, but we can't see it with our naked eyes."
Su Chen frowned and scanned the surroundings with his Appraisal Art, but he still found nothing.
At this moment, Xie Xuanji seemed to have noticed something. His eyes burst with a strong light as if it could penetrate space and find the most original existence in this space.
In an instant, a red light flashed, and the outline of a flying sword appeared in this square space.
This flying sword only revealed a trace of its shadow, but it gave Su Chen an extremely terrifying feeling. His whole body was instantly soaked in sweat, and he subconsciously took a few steps back.
Xie Xuanji suddenly showed a look of shock.
"I see, it's this!"
"Senior Brother, what did you find?"
Xie Xuanji raised his hand, and the red flying sword leaped from the void and fell straight into Xie Xuanji's hand.
The flying sword exuded a dark red light. It was not like an ordinary flying sword magic weapon. It did not even have a physical body. It was an existence that was completely between illusion and reality.
Xie Xuanji looked at the red flying sword in his hand with an extremely solemn expression. He seemed to be a little puzzled, as if he was surprised that this red flying sword would appear here.
He must know the origin of this flying sword.
However, since Xie Xuanji did not say anything, Su Chen was too embarrassed to ask. After all, his task was only to open the door. No matter how powerful this flying sword was, it belonged to the Sect of Wonders. He definitely had no right to ask.
Xie Xuanji was silent for a long time. Suddenly, he sighed and sent the red flying sword back to its original place. He then left the Yin Yang Realm with Su Chen.
Along the way, Xie Xuanji frowned and did not say a word. No one knew what he was thinking.
Unknowingly, the two had returned to the outside of the monastery.
Fairy Bi Xia was still waiting here.
Only then did Xie Xuanji recover. He handed a Qiankun Pouch to Su Chen and said, "Junior Brother, keep it well. Don't tell anyone about what happened today. Otherwise, I'm afraid it will bring disaster to the Sect of Wonders."
Su Chen nodded solemnly. It seemed that the red flying sword's origin was very big. Just the news of it being leaked would bring disaster to the Sect of Wonders. This was definitely not an ordinary flying sword. It was not even comparable to a divine tool. After all, which big sect did not have a few divine tools? To these giants, divine tools were nothing.
Su Chen opened the Qiankun Pouch and took a look. It was filled with 100 million origin nuclei.
It was heavy and filled with joy.
Su Chen said, "Senior Brother, farewell."
Xie Xuanji regained his benevolent look and said, "I hope Junior Brother can get a good result in the Heavenly Ascension Spell Symposium. I don't have anything to give you, so I'll give you a word."
As he said that, Xie Xuanji grabbed Su Chen's hand and wrote the word 'life' in his palm.
What a powerful divine rune power!
This was a method of carving divine runes using one's physical body. Although Su Chen could also use it, he was definitely far inferior to Xie Xuanji. He was definitely a top divine talisman master!
Feeling the majestic life force contained in the word 'life', Su Chen knew that this was a life-saving method given to him by Xie Xuanji.
Su Chen's heart warmed. He bowed and said, "Thank you, Senior Brother Xuanji."
"Go."
Su Chen nodded and turned around. He flew away on the rainbow bridge with Fairy Bi Xia.
After leaving the core of the Sect of Wonders, Su Chen discovered that Fairy Bi Xia was looking at Su Chen with a shocked expression. He could not help but ask, "Is there a flower on my face?"
"Why did the Sect Leader call you Junior Brother?"
Fairy Bi Xia's heart was already in a perilous situation. It was just that she could not ask earlier. Now, she could not help but ask.
"Ha … You must have heard wrongly. How can I be the Sect Leader's Junior Brother?" Su Chen pretended to be ignorant and laughed. He then sped up and flew away.