8，K，P，S。

This is the message left by Yule before his life and death, this information was left in an emergency, and it is almost impossible to decipher it, but Cao Zihuan is still quite a representative of these letters.

8, which is a number, but it also means infinity, like the famous Möbius ring, it means infinity, and K stands for something related to that ornament, which is the famous Klein bottle that can never be filled.

The same is true of P, representing the Penrose ladder that never ends.

The place of origin of that ornament and the person who put forward these concepts is a place of birth.

The only thing that doesn't fit in is S, but if you don't think of S as a letter alone, but as a symbol, it means that this one is close to the infinite meaning of 8.

And the guy who has the most to do with S is the guy Serpent, and that guy is the symbol that wants to become infinite.

Serpent had spent so much time trying to achieve immortality, and he wanted to become an indestructible being at all.

All of this was planned by Serpent, who, as the sole survivor of the previous civilization, planned to collect these resources.

"The second stage is complete, and I'm still very idle now, so I can spend some time with you." Serpent smiled, he had finally completed the second phase.

The power of the Fire King's core had been completely absorbed by him, and he gently shot out a flame, this flame was like a storm, and even the red flame felt a little hot for everyone present.

"The core is not something you humans can use casually." Serpent's current strength is even more terrifying than before, adding up to only two cores, he can actually suppress the strength of two people who have reached the point of three cores and one with two cores.

At the time of this hard battle, Baron and Calais were still looking for the rampaging Baron on the battlefield, and Yu Xin had already killed a lot of people under the current situation.

The two of them finally found Yu Xin near the King of Death, Yu Xin killed indiscriminately on the entire battlefield, as long as he saw a creature was his target, there were already many dead.

The heavy sword in Yu Xin's hand now slashed at a piece of Fusion, killing seven or eight Fusions at once, and the rest of the Fusions didn't dare to approach at all when they looked at him.

Then Yu Xin turned around and saw the tank in the rear, he rushed over and slashed the tank into two pieces, and then slapped a part of it out, and the wreckage that was photographed out was like a cannonball.

At this time, Baron and Calais had already arrived at Yu Xin's side, and the two of them grabbed Yu Xin's arm.

"Hey, Yu Xin, calm down!"

Baron shouted loudly, but Yu Xin didn't listen to him at all.

Cales wanted to hold Yu Xin, but Yu Xin's strength was surprisingly strong, and he couldn't pull Yu Xin at all.

"Then let's see if we can calm him down for a while." Baron had already drawn his knife, so he could only temporarily let Yu Xin calm down.

Assault, Dragon's Teeth.

The blade went straight to Yu Xin's vital point, stabbed it over, and the heavy sword blocked the knife, and then, Yu Xin backhanded, and the blade had reached Balon's neck.

Baron immediately stepped back, the blade only scratching a little skin.

"Cales, this guy is here for real, he really wants to kill us." Baron covered his wounds, and now Yu Xin's reflexes were really good.

Now, there is another person who is still praying for Yu Xin, that is Xiang Xiaoyi, she is not good at fighting, and she can't go to the battlefield, so she can only do some logistics work.

Originally, she was with Ye Ling's assistant Hill and Luo Key, Luo Key now likes to sleep more and more, but she doesn't know what is going on with this little guy.

Yu Xin doesn't know if there will be danger now, Xiang Xiaoyi is still very worried about Yu Xin, this reckless guy really can't be reassured.

Suddenly, Xiang Xiaoyi, who was still sleeping, saw that Luo Jian suddenly did it.

"Did you wake up?" Xiang Xiaoyi stood up, intending to come over and hug Luo Key to get out of bed, but Luo Key got out of bed by himself and slowly walked towards the door.

"Keykey, what's wrong with you?" Xiang Xiaoyi found that something was not right, Luo Key's eyes had turned gray-white, and his body exuded a strange power.

"Miss Xiaoyi, what are you going to eat today?" Ciel knocked on the door and walked in, just as Luo Key took the opportunity to walk out.

"What is this?" Hill was a little strange, usually Luo Key should be sleeping at this time.

Luo Key suddenly opened a tunnel, this tunnel is a space tunnel, but how did Luo Key do it.

Two

When the people looked at each other, Luo Jian had already walked into the tunnel.

"Keykey, come back!" Xiang Xiaoyi and Hill followed into the tunnel together, and the two of them only saw a piece of light, and then when they regained their sight, they only saw a piece of bloody ground, surrounded by roars and wails.

Just as they were in a daze, a Fusion suddenly pounced, and the two of them didn't have time to react or defend.

The black sword fell, Fusion turned into two sections, and a man dragging the sword appeared here, Yu Xin was stopping here, and in front of him, Balon and Cales, who were already scarred, fell to the ground.

Yu Xin covered his head, he was now frantically resisting the black lines on his body.

"Ahh

Yu Xin felt that his head was about to explode, and he could no longer support himself to think.

"Yu Xin!" Xiang Xiaoyi saw Yu Xin's appearance, she actually knew about the black lines on Yu Xin's body all along, but she knew that even if she said it, Yu Xin would always use this power.

"Yu Xin, calm down!" Xiang Xiaoyi was in front of the dying Baron and Calles, and Yu Xin was now holding a sword to give them the final blow.

"Miss Xiaoyi, run!" Hill shouted next to him, in this case, Yu Xin would definitely kill Xiang Xiaoyi.

"Don't let it!" Xiang Xiaoyi is ready, if Yu Xin kills Baron and them, he will definitely regret it for the rest of his life, she still owes Baron a life, she no longer cares about dedicating her life.

The blade fell, blood splattered, Yu Xin let out a roar like a beast, he looked at Xiang Xiaoyi in his arms, Xiang Xiaoyi was about to cut off his breath, and the blade hit her vital point mercilessly.

The black lines were suppressed at this moment, Yu Xin hugged Xiang Xiaoyi, he felt that he had returned to the feeling he had back then, the time when he was unable to do anything about his lover.

And now, he has encountered this situation for the second time.

Xiang Xiaoyi's hair was scattered, just like Mo Qianxue back then, and this time, Yu Xin killed his lover with his own hands.

The black lines began to shrink, and the flesh and skin on Yu Xin's body appeared, and the flesh that was wrapped in black lines before was already blurred with flesh and blood.

Xiang Xiaoyi looked at Yu Xin, left one last kiss, and then stopped breathing.