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It wasn't until it was dark that everyone went back to the house.

Chen Cao didn't let Cheryl and Yura jump into the lake to take a bath again, and if they were allowed to go down to the lake again, it was estimated that they would have to play until it was dark.

Let them clean up in the pool before going back to the house.

Although there is a swimming pool at home, Chen Cao and Fali rarely use it.

When Chen Cao and Fali play in the water, most of the time they also go to the lake.

They also like the feeling of being in the lake, and the pool is mostly used by the family's pets to play around.

Of course, the water is changed every day.

However, when Yura and Cheryl returned, it was Cheryl who helped Yura back.

Chen Cao frowned and pulled Yura to his side: "Yura, what's wrong with you?"

"It's nothing, it's just a little tired. ”

Chen Cao took out his stethoscope and examined Yura's body.

The potion that Chen Cao gave to Yura last time increased Yura's resistance.

But Yura's body is still too weak after all, and she still gets sick easily.

And once she gets sick, then it is very dangerous for her.

Chen Cao was unwilling to control Yura, restricting her from what she couldn't do and what she couldn't do.

If he could, he would prefer that Yura would grow up happily.

Instead of being a caged bird and watching others play, she could only watch silently from the sidelines.

Only in this way, she agrees with the danger of going to poop.

Yura has a low-grade fever, because of Yura's special physique, so even anti-inflammatory and antipyretic drugs cannot be taken at will.

At this time, Lao Hei appeared beside Chen Cao.

"I, I feel the breath of her death. ”

Chen Cao's face suddenly turned bad, and he was not angry with Lao Hei.

Whether or not Lao Hei exists means that Yura's physical condition has deteriorated again.

Moreover, this time it is life-threatening.

This also means that Chen Cao has no time to grind and study anymore.

Chen Cao remembered that when his mother took him to the United States, she actually wanted to donate bone marrow herself.

This shows that his bone marrow and Yura are matched.

Generally speaking, siblings have the highest chance of being matched with bone marrow.

Of course, Chen Cao and Yura are half-siblings.

In fact, donating bone marrow sounds scary, but it is actually not as scary as imagined.

And there are now safer donation options than in the past.

To donate bone marrow, what is needed is the hematopoietic stem cells in the bone marrow.

The human body's hematopoietic stem cells are actually self-divided by an ancestor, and then there will be more and more.

Therefore, after the bone marrow is extracted, the hematopoietic stem cells will theoretically divide rapidly to make up for the reduced part.

In the past, bone marrow donation was relatively safe, but there were still certain risks.

At present, the blood culture method is used, which only requires a small amount of bone marrow hematopoietic stem cells to be extracted and then cultured in the blood.

Therefore, for donors, the danger is also minimized, and it is even similar to donating blood.

This is also called a peripheral blood stem cell transplant.

"Cheryl, go and rest first, Farry, you sleep with Cheryl tonight. Chen Cao said.

"Hmm. Fali saw Chen Cao's solemn face and nodded.

Chen Cao hugged Yula down into the basement: "Lao Hei, you come to help me." ”

Chen Cao does not have the conditions required for culture medium here, so he can only directly perform bone marrow transplantation.

And such a transplant operation is mainly on Chen Cao's body, and Yura, as a donor, she only needs to passively accept blood transfusions, so there is no big problem.

The main problem is still Chen Cao, who needs to find someone to help him transplant bone marrow.

Therefore, Chen Cao needs to let Lao Hei help him extract the bone marrow.

The process of transplantation is then completed, and it must also be carried out in the space cracks.

"Chen Cao, you first make an opening in your back, and then I will extract it with my life to extract your bone marrow. ”

"Hmm. Chen Cao lay on the cold metal bed, stabbing his back with difficulty.

Yura was lying on another bed next to her.

"Is the opening big enough?"

"That's enough, it's okay. ”

Old Black began to cast a spell, first the blood was ingested.

Then Chen Cao felt a tingling pain, and the white substance mixed with plasma gathered on Lao Hei's palms.

"That's pretty much enough. Chen Cao said.

Lao Hei gently pushed the liquid on his palm in front of Yura, and the liquid began to slowly penetrate into Yura's body.

At this moment, a black line suddenly appeared behind Lao Hei.

This black texture is like what the Buddhists say**, Chen Cao looked at Lao Hei in surprise.

Lao Hei didn't seem to hear it, and he was still concentrating on his magic.

Eventually, the bone marrow was fully integrated into Yura's body.

Only then did Lao Hei stop, and it was only then that he realized his change.

"Huh?"

"Old Black, what's wrong with you?"

"It's a strange feeling, I'm stronger. ”

"Why?"

"It seems like I saved your sister. ”

"The Soul Hook Envoy saved people, and then got a reward?" Chen Cao looked at Lao Hei with strange eyes.

"No, it's to save a mortal man. ”

Lao Hei reached out to pull his hood, but he showed a face like Chen Cao.

"Fu**, why are you the same as me?"

"I can be anyone, and my looks mean nothing to me now. "Old black became Farry's face again.

"Stop me, don't let you become like Phari. ”

"Okay. Old Black put his hood back on.

"Can the aperture behind you disappear? ”

"I can't do it, it's a sign of my ability. ”

"Just one more aperture, what's the point?"

"Now I am no longer a soul messenger, but a death messenger. ”

"Well, the title sounds more scary, what else has changed?"

"I can appear before people. ”

"Well, that looks scary, and besides? Help me kill someone, for example. ”

"No, if I kill, I will still be punished. ”

"At the end of the day, it doesn't work. ”

In fact, Lao Hei's biggest role is to deal with evil spirits.

He is also the most deterrent to evil spirits than those demonic servants of Chen Cao.

Even Samael is no match for Lao Hei.

However, with Lao Hei's attitude, he doesn't seem to be too excited about his upgrade.

Then, Chen Cao carried Yura out of the gap in space.

In a daze, Yura seemed to wake up a little.

However, she was not awake yet, and it wasn't until the lights outside that Yura woke up.

"Brother...... I just saw heaven ......"

"Why do you think so?"

"There's a big castle, and that's the castle of heaven. ”

"Huh...... You think so. "Chen Cao can't say that what you see is not heaven, but the lair of death.

"Bookmark for easy reading"