"It's very difficult."
Butterfly continued, "The spiritualized universe isn't weak, but it's very difficult to invade our universe. It'll take a long time to connect the two universes."
"But Tianci has already been in our universe for a long time," Lu Yin said.
Butterfly was silent for a moment. "Yes."
"So, the spiritualized universe might attack us?"
"It's possible."
"Through where?"
"The universe's boundary."
"Take me there."
Lu Yin was certain that Butterfly Tianen did not know that Tianci had been killed. There had been no time for Tianci to report back then, which meant that Butterfly Tianen did not know that Lu Yin had already gone to the universe's boundary and seen the door.
If she had not brought him to the boundary, then he would have been able to tell.
Perhaps it was because the butterfly was truly afraid of death, or perhaps it was because Lu Yin was too ferocious, but after a period of time, she really did bring Lu Yin to the border where Tianci was. There, they saw the gate that connected the heavens and the earth, as well as the Thunder Lord who stood guard outside it.
"Jiang Feng?" Butterfly was surprised.
Outside the door, Jiang Feng also saw Butterfly and Lu Yin. "You guys?"
Seeing Butterfly's miserable appearance, Jiang Feng laughed. "You were beaten up pretty badly, Protector of the Four Directions."
Butterfly did not speak, as she was still afraid. Since Jiang Feng was here, it was obvious that Lu Yin and the others had been here. If she had lied to Lu Yin and gone to the fake boundary, then they might have been dead by now.
"Uncle Jiang, how's Tianci?" Lu Yin asked.
Butterfly looked at Jiang Feng.
Jiang Feng shook his head. "He didn't come out. By the way, how did you find this butterfly?"
Lu Yin told him about the battle that had taken place in Immemorial City, which left Jiang Feng dumbfounded.
Jiang Feng knew that there would be a final battle between the humans and the Eternals, and he had been waiting for it to happen. He had thought that it would happen after the Protectors were dealt with, but he had not expected that the final battle would begin while he was guarding the door.
Lu Yin roughly explained the final battle to Jiang Feng.
Jiang Feng was still afraid, as there had been several turning points in the battle. Although the humans had won in the end, it had been a narrow victory. Any of the turning points would have reversed the outcome.
"The sacrifice of a Grand Empyrean is admirable. I've heard of Ancestor Hui, but I never thought that he had been hiding among the Eternals all this time. He played such a crucial role in the final battle.
Lu Yin felt heavy when he talked about the sacrifice.
He stepped on the butterfly and approached the door. "If you don't want to die, then show me your worth. What's going on here?"
Without any hesitation, Butterfly directly said, "Behind this door is the spiritualised universe, but it's quite far away. Even with the speed of us Primordial realm experts, it'll take us a very long time to pass through it. In the past, we used this door to go to other universes, and when we returned, we could easily determine whether a creature belonged to this universe."
"Who built this gate?"
"I really don't know. The first time I came here, the gate was already here. Tianci and the others didn't know either."
"I'm curious about something," Jiang Feng said, staring at the butterfly. "Do you belong to this universe?"
The butterfly paused for a bit: "I myself belong to this universe"
"Where are the other three?"
"Tian Fa doesn't belong to me. Tian Feng, I don't know."
Lu Yin smiled and exchanged glances with Jiang Feng. Both of them laughed in such a mocking manner.
They were supposed to guard this universe and expel foreign creatures, but two of the four guardians actually didn't belong to this universe. How laughable. From the looks of it, they weren't helping this universe expel foreign invaders at all. They were clearly treating this universe as a cage. They could enter and leave freely, but the people of this universe couldn't leave.
The humans were at their peak, and there was even the slightest chance that the progenitors could leave, but they would be surrounded and killed.
They weren't the four guardians, but prison guards. They were the prison guards that watched over this universe.
The butterfly clearly knew what would happen if she told them the truth. The humans would become even more hostile towards them, but she didn't dare to lie.
She believed she had a chance to live because she was useful.
How could a mighty Primordial realm expert be useless?
She didn't know how Tian Fa had died, but with Tian Fa's temper, he definitely wouldn't lower himself. She was different. She was willing to lower herself to survive. She hadn't lived enough yet.
As long as she lived, she would have a chance at revenge.
They were still too benevolent. They should have killed all the human experts after killing Alpha Primordial. They would have had a chance then, but it was too late. It was still too late.
"Open the door," Lu Yin ordered coldly.
The butterfly begged, "I- I can't open the door. Only Tianci can."
Lu Yin frowned, "Then what's the point of keeping you alive?"
The butterfly said, "I'm a Primordial realm expert. I can help you do anything as long as it's within my ability."
"I can tell you about spiritualized universes. I know a little about them. Also, I can freely travel through parallel spacetime and sense creatures that don't belong to this universe. I'm really helping this universe expel foreign invaders. Really, Daolord Lu, please believe me."
"Aside from dealing with the humans, we're really fulfilling our duties."
Lu Yin narrowed his eyes, "Knock on the door."
The butterfly was stunned. Sensing Lu Yin's killing intent, she could only face the door and slam it.
From afar, it looked like a butterfly was slamming into the door. It was even more miserable than a moth flying into a flame. Even if a moth would be burned to death, it would still have a moment of brilliance before dying. However, the butterfly slammed into the door without even making a sound. It just slammed into the door soundlessly, causing only ripples.
Lu Yin didn't know if Tianci could hear him behind the door, but he didn't want to try. The next time the door opened, it might be the start of a war between the spiritualized universes and this one.
No matter how confident he was in this universe, Lu Yin didn't want to start a war. A war would mean the deaths of many people.
No one knew how many universes there were.
He was tired, and he just wanted to protect his own universe.
The butterfly slammed into the door again and again, causing the light to dim.
"Speak! Don't you know how to knock?" Lu Yin barked.
The butterfly was sorrowful and shouted, "Tianci, open the door! Tianci, I'm Tianen, open the door! Tianci …"
Jiang Feng felt strange. He kept feeling that something was off, but he couldn't put his finger on it.
This was clearly a matter of life and death for the universe, but it felt like a robbery.
He looked at Lu Yin, "How's Kong Tianzhao?"
Lu Yin replied, "He's still alive."
Jiang Feng sighed, "He's quite unlucky."
Lu Yin didn't understand.
"In order to break through, he fought a battle with his parallel universe. In the end, he killed himself and sealed off his emotions."
"He killed his way into the Disaster Realm and specifically targeted the Xi Ancestor. He would either break through or die. However, after several battles, he hovered between life and death. He didn't die, but he didn't break through either. How unlucky."
Lu Yin's heart skipped a beat. "Uncle Jiang, do you have another parallel universe that's identical to you?"
Jiang Feng nodded. "Yes."
"But why have I never seen a similar person in all the parallel universes I've seen in this universe?"
Lu Yin didn't understand. In the past, every change in the universe could lead to a change in the future. However, parallel universes could appear endlessly, and every change should give birth to a parallel universe.
Even now, no one could explain the problem of parallel universes.
The Sequence of Strings connected various parallel universes, but from Lu Yin's point of view, they didn't seem like parallel universes at all. Instead, they seemed like superimposed universes.
The only real parallel universe was the one known to White Cloud City, which had someone exactly like him. That was a parallel universe.
Jiang Feng said, "Actually, I'm not sure either. I've heard that the Eternals define a parallel universe as a real parallel universe. It's different from the one we see now, and the Eternals see it differently. However, I've interrogated a few traitors, and they just want to find a parallel universe. As for the reason, I don't know."
Parallel universes, Sequence String. Lu Yin was deep in thought.
In front of him, Butterfly was still banging on the door and shouting, but it was useless. The door didn't move, and there was no response.
After a long time, it was still useless.
Lu Yin said, "Alright, stop."
Butterfly stopped and faced Lu Yin. Her wings were gone, and she looked miserable. "This door is very important to the spiritualized universe. Tianci can't open it casually."
Lu Yin looked at her. "Although you didn't open the door, you did well. I can give you a chance to live."
Butterfly sighed in relief, and her voice softened. "Thank you, thank you, Master Lu."
Lu Yin asked, "Why did you kill Ancestor Ku?"
"What?" Butterfly was stunned.
Lu Yin repeated himself. "You said that because of the rules, you didn't join forces with the Eternals to attack the humans. Otherwise, the humans wouldn't have had the chance to defeat the Eternals, and I wouldn't have had the chance to grow. You had restrictions, so why did you kill Ancestor Ku?"
"At that time, I hadn't appeared yet. The Fifth and Sixth Mainlands were fighting, and the Starry Sky of the Tree Tree was split. The Primordial Space's strength was low, and the Six Forces could barely hold on against the First Disaster Zone. Under the pressure of the Seven Skygods, they were barely hanging on. Then, why did you kill Ancestor Ku?"
Butterfly was nervous. "This … I accidentally met him. This human was able to kill his way out of the Eternals, and his innate gift was extraordinary. So …"
Lu Yin's eyes widened. "Too forced. Your answer is too forced."
Butterfly trembled. "No, it's really like that."
"What did Ancestor Ku see when he killed his way into the Disaster Zone?
What did he encounter?
When he escaped, you chased after him. Why didn't the Eternals chase after him at that time?
Why did he lose a part of his memory?
What do you know?
Answer me! "Lu Yin shouted.
Butterfly stared blankly at Lu Yin and hesitated.
"Do you want to die?" Lu Yin shouted.
Butterfly said, "Path Master Lu, there are some questions that I can't answer, and this is one of them. Don't ask anymore. I'm a Primordial Realm expert, and I have value. I can be of great help to you."
Lu Yin's gaze was cold. "Answer me. What memory did Ancestor Ku lose?
What do you know? "
Butterfly's voice trembled as she sensed Lu Yin's determination. "Path Master Lu, you're touching a taboo."
Lu Yin was indifferent. "Killing Tianfa has already touched a taboo. I've asked you so many questions before, but you still haven't answered some of them. You've told me everything."
Butterfly's voice rose. "You used me to knock on the door at the border, and you never thought of letting me go. Lu Yin, you will die a horrible death. You humans will be miserable."