A stone slab next to the entrance to the cave.

"Criminal, do you know why your casting family is short but you don't even have a handful?"

Huang Wenhui turned off the flashlight, patted Su Yi's shoulder, and looked at the starry sky.

Su Wei shook his head blankly.

"That's because, you, a sword-forging family, didn't belong to our family in the first place. ”

"Poof. ”

Su Yifang drank the water in his mouth and squirted out, glared at Huang Wenhui and said, "Dead old man, you have read too many Xianxia novels." ”

"Boom. ”

Huang Wenhui rewarded Su Wei with a violent shudder, and then glanced at Su Wei before continuing: "Have you heard of Hawking's eleven-dimensional cosmology?"

Su Wei was dazed again, and replied, "What the hell is the hell?"

"Criminal, you are really white, so many years!" Huang Wenhui crooked his mouth and said, "Probably that means that the composition of the universe can only be explained by eleven variables like x, y, and z. In other words, in some places, the past time is like a valley, and the future time is like a mountain, and you can walk into it. ”

"And space also has the fluidity of time, not necessarily absolutely. In some places, space is relative. As a result, there are certain places called boundary holes, which connect two different units of space. ”

“”

Looking at Su Yi's blank expression, Huang Wenhui brushed the black line coiled on his head, and continued to explain: "It means that the relative flow velocity of space on both sides of this boundary hole is different, for example, it has been ten years on this side, and a hundred years have passed on that side. And connecting them is a process of transformation. Got it?"

"Yes, I almost get it. ”

Su Wei shook his head and asked, "You mean to tell me that this is a boundary cave, which is why this situation occurs." Because his space is also relative, it's not that those things are big and strange, it's that we're getting smaller. ”

"Well, that's what it means. ”

Huang Wenhui nodded with satisfaction, and just wanted to continue to say the following, but was interrupted by a burst of laughter from Su Wei.

"Hahaha, Master of Evil, do you think I will believe you? Pull the calf, do you want to be so scared that you pee your pants and just pull out a set of theories to comfort yourself? Hahaha. ”

"Boom. "Boom. "Boom. ”

Su Wei covered the three major bags on his head, wanting to cry without tears.

"Hmph, scoundrel, listen to me carefully. Huang Wenhui snorted and continued: "Therefore, we call the passage connecting the two relative spaces the boundary hole. The different relative spaces are called boundaries, and each realm is a microcosm of a large world, but it is carried out in a degree that does not understand. It's like playing the same movie at different speeds. ”

"Hey, so, your sword-forging Su family turned out to be in the opposite realm, a relative space that we call the Infinite Realm. ”

Su Wei asked, "Then why did you move here again?"

"That starts with the catastrophe in the Infinite Realm decades ago. Huang Wenhui raised his head again, saw the stars in the sky, and said slowly: "The time of the Infinite Realm is much faster than that of our world, it should be about two thousand years ago over there. The Winged Terran unleashed a Great Demon. ”

Su said backwards: "Winged Terran?"

"Well, that is a very powerful race in the Infinite Realm, as soon as their clan is born, they will carry something called 'Feather Source', and the amount of this kind of thing also determines the strength of each winged human race. The average Winged Humans have at most nine Feather Sources, but just about two thousand five hundred years ago, when a Winged Human Race's baby was born, it actually carried ten Feather Sources. ”

Huang Wenhui seemed to be caught in a memory, looked at the dense stars in the sky, and said.

The Winged Terran was overjoyed and had been cultivating him as a treasure. His cultivation speed was indeed very fast, but unlike the other Winged Humans, every once in a while, his body would undergo a transformation, from the original pure energy to dark energy. ”

And as his energy attributes shifted, so did his behavior. There is less and less time to be awake, and more time is in a state of confusion, and the six relatives do not recognize it, but only know how to kill and poke. Finally, when his attributes underwent the eighth transformation, the Winged Terran decided to kill him, otherwise when his attributes continued to transform, I am afraid that no one would be able to control him. ”

So, one night, the Winged Terran hunted him with all their might. Just as he was about to succeed, his father suddenly turned against him, and at the cost of blowing himself up, he stopped the people in the Winged Terran and let him escape. In the end, he hibernated, and his energy attribute changed again and again, and after the tenth change, his energy had completely changed to a dark attribute. ”

Huang Wenhui sighed and said, "Criminal, do you know what happened later?"

Su Wei shook his head.

Later, on the night of the full moon, he washed the Winged Terran with blood. The whole clan, hundreds of thousands of living beings, all died and wounded. And since then, the last shred of his sanity has also vanished, and he has become a real madman, who only knows how to kill and poke. ”

At that time, his strength had surpassed that of everyone in the entire Infinite Realm, and in just ten years, millions of beings in the Infinite Realm had been murdered. The only thing he does every day is to kill, stab, destroy. ”

Saying that, Huang Wenhui sighed leisurely and said, "A dark time. ”

"Old man, were you originally from the Infinite Realm?" Su Yi listened and suddenly stopped and asked.

Huang Wenhui was stunned for a moment when he was asked like this, and then nodded suddenly.