"If you became that strong, you could do much more than just travel between two worlds. However, that day is still too far for you. It's not even certain if you can survive to see that day."
As the unknown being finished answering, the effect of the Question Voucher ended. He went silent, not speaking for quite some time.
There was only silence in the room.
Either kill all those who could threaten you, or become so strong that no one could threaten you. Those were the only two methods for Eren to return to his world.
Unfortunately, he knew that both those methods were way out of his reach at the moment.
He didn't know who the other three people from earth transmigrated as. But he was certain they couldn't be weaker than him.
He was inside the body of a person who was even weaker than an ordinary person in this world. And he was stuck as a spy.
There was no way the other three could have any luck worse than him when every decision of his was accompanied by a possibility of death.
Heck, he believed that he could die without them even having to raise a single finger. Every day, he was walking on a thin line between life and death.
All he had at the moment was his Sword Emperor's Aura, and the Pendant of Protection with two uses left.
Both these things only allowed him to protect himself, but didn't allow him to kill others.
Let alone being able to kill them, he had a feeling that he was going to die right away if he came across them.
It was even worse since he didn't know much about the other three books and what those continents were like.
He had only read the first two hundred chapters of Demon Lord's Ascent. And in those chapters, the main character was still in the Eastern Continent.
There was only a little information about the Hero Academy revealed, because of the spy incident. But the details about the Necromancer Tower and the Holy Empire were even much more scarce.
He subconsciously reached out his hand towards the books. The novel content was right before his eyes.
So what if he didn't read that before? Now that he knew about the importance, he was willing to learn everything he could.
As his fingers were about to touch the books, the books turned into specks of lights, disappearing into the world.
All four books disappeared.
Eren looked at the person before him. "Can't you let me read them once?"
"Those books are completely empty now. Even if you wanted to read them, you can't," the mysterious person answered.
Eren sighed. He had thought that he might be able to cheat, but his attempt had failed.
"Do the other people from earth also know the methods to return to earth? Since you were so hesitant to tell me, I assume they won't know it?"
"Who knows? You managed to find out. Maybe they might as well."
The person didn't answer clearly. His words were just as vague, but they were true.
He had a system when he came to this world. The other three might have the same. Maybe they could also get a similar reward and think of the same method to get an answer?
He had no way to confirm it, so he could only believe it to be true. It was better to believe a lie, than to reject a truth when his life was on the line.
After thinking for some time, he prepared to ask a question.
"Can I-"
"Looks like my time is up."
Before Eren could finish his Question, the mysterious person stood up. The surroundings started to glitch, as if the world itself was resisting his presence here.
"I am not sure if we will ever meet again. I will only wish you the best of luck for the future."
His figure slowly started disappearing. The world was returning to normal.
"One last thing before I leave... You might think that you are at a disadvantage. But that's only because you don't know..."
"I don't know what?" Eren asked.
The mysterious person had already vanished, leaving behind a faint echo of his parting words.
"...about yourself..."
"About me?" Eren softly muttered, confused about his words. What did that person mean?
Unfortunately, the person who could answer had already left. And it wasn't clear if he was ever going to meet that person again.
The worst part was that he still had so many questions. He had more questions now that he had before meeting that person.
He still didn't know the identity of that person, or why he was brought into this world. Why was this world depicted in a novel? Why was he able to find this book? Was it truly a coincidence?
As he was lost in thoughts, trying to decipher his last words, he felt a light weight on his shoulders.
Celeste was sitting on his shoulders, looking at him innocently. She was able to move again.
She didn't know what had happened just now. While Eren had gone through an entire conversation with an unknown being, only a fraction of a second had passed for Celeste.
Eren also felt his connection to the Phoenix return. The world had returned to normal.
"I don't know about myself? Did he mean I don't know about Ren? Biggest advantage? What could he be talking about?"
"Argh, I forgot to ask him about the Memory Fragment!" Eren suddenly exclaimed, remembering something important.
He was informed that he needed to become stronger before he could use the Memory Fragment if he didn't want to go crazy.
Unfortunately, he didn't know how strong he needed to become. All this time, he had been thinking about asking this question in the meeting.
But when the meeting happened, he was so distracted by the information about the four books that he had completely forgotten the question that he wanted to ask initially.