"Steve, long time no see." Tony and Captain America say hello.

"Well, it's true that I haven't seen each other in a while."

"I heard, something happened to your S.H.I.E.L.D.? Because of Hydra? ”

"Indeed, the previous S.H.I.E.L.D. was so bad that it was actually another Hydra." Steve nodded.

"So why didn't you notify me? Even if I hadn't joined S.H.I.E.L.D., I would have been the captain of the Avengers. Frowning, Tony said as if he was a little dissatisfied.

"You're the captain of the Avengers? Why don't we know? Natasha couldn't help but say, "And, what was you like before, do you think we don't know?" After just going through a battlefield, I was so fragile that I almost had to go home to find my mother. Do you think we might be looking for you in this case? ”

"I'm not as fragile as you say."

"Huh!"

"Well, yes, it's true that I'm in a little bit of a situation here, but it's all right now, it's completely fine. So what's next? Need my help? Rebuild S.H.I.E.L.D. or what? ”

"S.H.I.E.L.D. doesn't need you for a rebuild, and in fact, we don't plan to meddle in this matter, it's all in the hands of Coulson. We're just the Avengers. Natasha shook her head.

"Indeed, it would be better to have a simple identity. So, what's next for the Avengers? ”

"It's Hydra, we need to target Hydra next, you can't imagine how powerful Hydra is in the world, and how deep they are hidden." Steve sighed: "I was fighting with Hydra at the beginning, and I thought that after waking up, I wouldn't have any entanglement with it anymore, but I didn't expect that after turning around, I would continue to fight with it in the end." As he spoke, Steve smiled wryly.

"Hydra? Hmm, the mythical monster that will regrow after cutting off a head? ”

"That's right, Hydra's slogan is to cut off one head and grow two."

"That's terrible. So when do we get into action? Do you need to call in enough people? To be honest, Ye Kai's kid seems to have become more powerful recently, but my steel suit has just been upgraded and has become more powerful, I want to compare with him, who is more powerful. Tony's tone was a little unconvinced.

“…… Tony, at this point, it is probably impossible to make a comparison, because Ye Kai is also a member of Hydra. Natasha said to Tony with a complicated expression.

"What?" Tony was stunned for a moment, looked at Natasha in astonishment, then turned his head to look at Steve, then at Hawkeye and Dr. Banner, who had not spoken, and finally put his gaze back on Natasha: "Are you kidding me?" ”

"Actually, Natasha wasn't joking with you. And Ye Kai, he was indeed a member of Hydra before, well, a former member. Steve, as Captain America, was more persuasive and sighed. He can understand Ye Kai's situation, but he is still a little relieved, after all, it is a hydra that has fought with him all his life.

"Tell me, what's going on?" Tony suddenly became serious.

"Actually......"

After listening to Natasha's story, Tony fell silent, everything seemed to be the result of his creation, because of him, Ye Kai had changed from an ordinary happy family to what he is now. However, after hearing that although Ye Kai joined Hydra, he did not do anything bad, he breathed a sigh of relief, but he was still a little panicked in his heart. Not to mention the others, that kind of enhanced serum, Ye Kai really didn't use the resources of Hydra and didn't conduct illegal human experiments? It's just that Tony doesn't want to keep thinking about it.

……

A drop of liquid was dropped into the test tube, and the liquid in the test tube began to change, the original red, magma-like liquid, the boiling suddenly began to intensify, a large amount of hot gas was continuously released, and the test tube containing the liquid faintly began to change, and even wanted to deform.

Maya Hansen and Ye Kai watched this change, and their mood began to get nervous, whether it was successful or not, it depends on the present.

If they don't succeed, they have to start looking for new ideas again, and they don't know when they will really succeed.

More and more heat continued to rise, and even the temperature in the laboratory began to rise gradually, and drops of sweat appeared on Maya Hansen's forehead and then dripped down her cheeks.

"Ye Kai, can we succeed?" Maya Hansen was a little nervous, and her voice was almost distorted.

"If we follow our calculations, it should work."

"Hopefully, no, it will succeed."

Soon, the liquid in the test tube calmed down, and the original magma-like red began to become dull, it should be said that it began to become clear, clear and thorough, and even the color became beautiful, but the original dose in the test tube was only a shallow layer after evaporation.

"Whew, done. The next step is to test its quality and effectiveness. Maya Hansen breathed a sigh of relief and said expectantly.

"Hmm!"

A mouse was placed in front of Ye Kai and Maya Hansen, a faint golden light flashed, the mouse lacked one of its front paws, blood flowed out of its wounds, and the mouse squeaked, which was pain and panic.

Ye Kai's tentacles, cough cough, are Ye Kai's simulated syringes, which directly inject the medicine into the body of the mouse. Then Ye Kai and Maya Hansen began to pay attention to its changes.

The mouse seemed to be more painful, but its wound was no longer bleeding, at least the hemostatic effect was quite good. However, Ye Kai did not pay attention to this.

The mouse looked more and more painful, squeaking, and couldn't resist even wanting to bite the severed limb of his front paw. It should be something that happened there that made it unbearable, Ye Kai frowned slightly, and shot out tentacles to immobilize the mouse.

Under the gaze of Ye Kai and Maya Hansen, the place where the mouse's severed limbs began to change, little by little, the bones, muscles and even skin were still growing again, this speed was not fast, but it was clearly visible little by little. At the same time, the severed limb should be very painful during immortality, and the mouse constantly struggles, trying to break free from the tentacles, but it obviously has no effect.

"Do you want to inject it with anesthetic?"

"Nope. We need to know this data. ”

"Okay!"

After half an hour, the severed limbs of the mice finally grew back, but the severed limbs that regrew looked a little delicate, and the hair on the severed limbs did not grow, a little smooth, and the bones were a little soft, similar to the soft bones of newborn babies.

"After the red, test the physical condition of this little mouse."

"Yes, master!"

After the test, the mouse looked a little malnourished, no, it should be said to be very malnourished, apparently the severed limb grew rapidly in a short period of time, which consumed a lot of nutrients and energy from the mouse. At the same time, the bones and muscles of the severed limbs of the mice are very immature and take a period of time to grow and adapt. Other than that, there is nothing else.

Of course, it may also be because the time is too short to find out about other conditions.

At the same time as supplementing the nutrition of the mice, every period of time, the body is tested, and its various data are constantly recorded. This kind of thing is quite important.

Of course, in the experiment, you will definitely not only use this one mouse, but also other mice.

Some mice will inject anesthetics during experiments to see if the efficacy of the amputated limb regeneration agent will be affected under the state of anesthetic.

Some will cut off two claws to see if the effect of the potion is strong enough, and how the dosage should be used is the best.

There are also mice whose limbs have not just been broken, but have already been broken, after direct injection, to see if it is effective for this old injury, or whether it is effective enough, what kind of gap exists between the new injury and the old injury, etc.

All kinds of experiments, all kinds of data, they all need to be recorded.

Fortunately, there is a red queen in the laboratory, and Ye Kai's ever-changing tentacles, so everything is very simple and easy to do, otherwise Ye Kai and Maya Hansen may be exhausted to death.

A day later, Ye Kai and Maya Hansen came back to these guinea pigs.

"Looks good. After the red. What about them? Are there any anomalies in the data? Ye Kai asked to the Red Queen.

"Master, these mice themselves do not have any other adverse conditions except for nutritional deficiencies, but the mice that do not use anesthetics have abnormal mental aspects. Some almost had a nervous breakdown, while others were so depressed that it was difficult to recover. This was not the case with mice injected with anesthetics. ”

"Well, then, it should be the result that the severed limb is too painful to be reborn, so the mental side can't bear it, which is normal, just like humans need to inject anesthetics when they are undergoing surgery. So did the other guinea pigs have this condition? ”

"Not really!"

"Good. So to list their data, I need to take a look. ”

"Yes, master!"

Ye Kai and Maya Hansen checked the data of the experiment, and finally a smile appeared on their faces: "It's successful, we've succeeded." ”

"Yes, we succeeded, and now, only the last human trials remain. After the human trial is over, there is no problem at all. Dr. Hansen. Congratulations! ”

"Thank you, Ye congratulations, Dr. Ye, it's Mr. Ye."