Karn rushed back from there after dealing with the affairs of the Land of Waves and the Land of Water, and made a beeline for Tsunade and Orochimaru's underground laboratory.

As soon as he saw Karn, Orochimaru's eyes lit up and he said, "Mr. Karn, the serum has run out, and although there has been some progress, we need to proceed with the next experiment. ”

After Orochimaru finished speaking, Tsunade saw Karn's eyes looking at her, and continued Orochimaru's words: "Orochimaru is right, now that we have collected a lot of useful data, we can basically confirm that the Desperation Virus can inhibit the erosion of my grandfather's cells, and my grandfather's cells can also enhance the metabolic function of the test subject, so that the two tend to a peaceful state..."

Karn asked, "Just what?" ”

"It's just that when we thought the experiment was successful, they exploded again, probably because of the 'emotions.'"

Tsunade said helplessly, if the subject has been in a coma, then they can basically declare the first experiment successful, no matter what the wound, they can quickly recover through the desperate virus, and even cut off the subject's palm.

However, when the subject came to his senses, his emotions fluctuated until he reached a peak, and his body exploded violently.

However, judging from the scale of the explosion, Tsunade and Orochimaru have indeed made a lot of progress, and at least a few complete bones can be found in the last explosion.

"The equipment for collecting data and medical examinations, there should be a substitute in the ninja world, although it is a little more expensive, so let's replace it with that first... As for the serum, it will be sent to you in a few days, so I'll take a closer look at the data first. ”

Karn rubbed his head and said, Orochimaru doesn't care about human life experiments, the methods are rough enough, and the efficiency is fast enough, but it is too expensive...

He brought three sets of equipment, of which the medical testing equipment had been completely destroyed, and Karn was more worried about the money for these equipment than the cheap human life; And he didn't want to travel back and forth between the two worlds frequently, just to send equipment to Orochimaru.

It's better to customize a few more in the ninja world, anyway, the detection equipment is not the core, if the other equipment is destroyed, then Karn will be really heartbroken.

As Karn looked at the data from the last few days, Orochimaru said, "If you can, it's best to send some different subjects, teenagers, women, children, and ninjas..."

When Karn heard this, he looked up and asked, "Orochimaru-kun, can I call you that?" ”

"Just call me Orochimaru."

"Well, you can just call me Karn, Orochimaru; The first three are good to say, there are all in the prisons in the Fire Country, and the last one may be difficult for me to do, do you have any way? ”

Orochimaru smiled and said: "There are a lot of ninjas who are imprisoned in Konoha Prison, but if you want people there, I'm afraid they will have a fair reason to meddle in the affairs here, that kind of situation, I believe you won't want to see it." ”

"Well, let me figure it out."

Karn shook his head and said, "It's better to spend more money and let Kakuto catch some ninjas, and by the way, you can purge the wandering ninjas in the country of tea."

Tsunade didn't intervene in this kind of thing, and although she accepted human experiments, she didn't want to actively participate in this kind of topic; Probably with the mentality of 'for the sake of my brother, there is no other way', you can be passive but don't want to take the initiative.

"Even ninjas have a way, worthy of Karn-kun."

Orochimaru praised with a smile, he was now more and more interested in the forces behind Karn, and even such a thing as a desperate virus could not be done without a professional team.

"Can even Mu Dun Blood Inheritance be activated?"

Karn asked in surprise when he saw that several of the subjects were exhibiting unusual behavior.

Tsunade replied, "That's true, if the Desperate Virus doesn't get out of control, I can reproduce my grandfather's Mu Dun Ninjutsu." ”

If the experiment succeeds, Tsunade will want to give herself a shot, but she knows that Karn is the kind of person who wants money to die, and that giving her a serum won't give her an extra gram unless she can come up with something enough to make Karn's heart flutter.

For some time afterward, Karn traveled between the Experimental Base, Kawaki Town, and the Fire Nation Capital, and he was now basically the logistics steward of the Experimental Base; Arrange instruments and test subjects, and sometimes return to the Marvel world to bring Maya and Killian's research on the Desperate Virus to the ninja world.

The two of them hadn't seen the intercolumnar cells, so Karn wasn't going to give them the research data of Orochimaru and Tsunade, otherwise it wouldn't make sense.

In addition, Karn also took a lot of time to practice ninjutsu diligently, and he had already practiced the three-body technique and the shadow clone technique, but the seal was a little slower, and the fastest could probably do three seals in one second, which was when it was superordinary, and under normal circumstances, Karn still had two seals in a second.

However, Karn's chakra attribute is strange, his chakra attribute has become a chakra with all five attributes.

Kakudu was surprised to learn of this, and then shook his head and sighed, with Karn's talent, he had wasted such a good attribute; Whether it's chakra or talent for ninjutsu, Karn isn't fit to be a ninja.

Karn guessed that the change in his chakra attribute should have something to do with the chakra in Kakuto, he was not a person in the ninja world himself, and he had never been in contact with chakra before, strictly speaking, he was the same as the first batch of chakras who were passed down by the six immortals, but Karn was weaker.

However, Karn doesn't care about his own strength, he has a clear positioning for himself, and when he encounters an unavoidable danger, he uses the system to shuttle between the two worlds, which is already equivalent to the invincible Flying Thunder God technique, and no enchantment or sealing technique can limit him.

Learning other ninjutsu is also just to hide the whereabouts of his identity, to study the desperate virus and the cells between the columns, and also to enhance his physique.

Karn is positioned as a boss, not a charging thug; He spent 30 million taels of Jiaodu teaching him for a month, just to learn a Earth Escape and Earth Dragon Hidden Technique, which could allow him to quickly sneak underground and run away at a critical moment in the Marvel world.

............

"Calm down, Earthstone-kun, if you survive, we'll let you go and give you a sum of money, provided you cooperate..."

"Ahhh

Boom!

Before Orochimaru finished speaking, the test subject in the experimental isolation area exploded again, but this time only one arm exploded, and it was still slowly recovering, and the bones, blood vessels, and meridians were all visibly restored to the naked eye.

"Success?"

When Tsunade saw this, he quickly recorded all of the subject's physical reactions, and called up the ratio of intercolumnar cells to the desperate virus.

"Hehe, it seems that my conjecture was correct, Tsunade."

Orochimaru smiled proudly, although his experiments would cause the death of many test subjects, but those test subjects were not wasted, the person in front of him fully explained everything, he was only one step away from success and repeated trials.