Human Realm.

Castle of Farcist Kingdom.

In Faelana's medical research laboratory.

As the most talented young member of the Sieberra medical family, Faelana has a strong interest in the field of healing arts. She has already developed a prototype of the experimental drug from the black dragon meat that Green asked her to study.

Knowing that Green was busy elsewhere, she found Aloof and the others and handed the experimental drugs to them.

According to Faelana's speculation, if the drug works properly, it will be able to replace all medications on the continent and become the ultimate panacea that can cure all diseases.

The only thing currently missing is test subjects.

After some discussion, it was decided to use patients who were believed to have no hope of survival as test subjects.

The families of the patients were very open-minded about this matter, especially when they learned that the drug was developed by the Hebağrıi family. Even if they had the attitude of trying anything when faced with desperate situations, they had no reason to refuse.

The results were unexpectedly positive.

Thanks to the undying power remaining in the black dragon meat, the critically ill patients fully recovered in just a few minutes and even felt better than before.

After confirming that the drug had no problems, Faelana also understood the immense impact it would have on the world.

However, since Green has not yet returned, the group decided not to publicly announce this drug for the time being but secretly used it to save many patients who were on the verge of death.

Due to not charging any fees, and the fact that the patients had no chance of survival before, both the families and the patients themselves were willing to keep this secret.

As for when to publicly announce this drug, it would depend on Green's attitude after his return.

But at this moment, Green is still deeply studying the power of the source in the territory of the God of Light, and he may not receive this news for a while.

Elsa and the others saw Green enter the door and did not reappear for a long time, so they waited outside the door.

During this period, a few of them had the idea of going in to see what was happening, but they were stopped by Salo Uth. His reason was that the God of Light would not do anything bad to Green, even if he wanted to, he couldn't, so it's better not to disturb.

So they all waited outside the door until Green reappeared.

About a week later, Green returned.

The moment Green stepped out of the door, Salo Uth and the others immediately appeared in front of him.

Green's temperament has undergone tremendous changes compared to a week ago, the most obvious of which is his confidence, which is evident in every gesture he makes. And whether it is an illusion or not, Elsa always feels a faint golden light emanating from Green.

"What happened during the time I was away?"

Green smiled at everyone, but when he noticed Elsa, he immediately rushed towards her with a happy face.

"Elsa! I missed you so much!"

Initially, Elsa was a bit shy being hugged by Green in front of so many people, but when Green said the next words, this shyness turned into dissatisfaction.

"Of course, I also miss Aloof, Lilith, Yuzuriha, Mio, and Tia very much!"

"Hmph, let go of me, you are holding me too tight!"

Elsa hmphed dissatisfaction and pushed herself out of Green's arms.

Being treated so coldly, Green was a little puzzled, but soon he seemed to understand something and had a look of realization on his face.

"I understand, Elsa is just shy, right?"

"Don't talk nonsense! You playboy!"

"It's been a long time since I heard someone use that word, how old-fashioned."

Green not only showed no remorse, but also criticized in a serious manner.

But Elsa was only speaking casually and didn't really dislike Green, she just instinctively didn't want Green to feel too proud.

Saro Uth looked at the interaction between the two and felt a sense of emotion.

He didn't expect Green to easily snatch away his granddaughter, but if the person was Green, Saro Uth was relieved from the bottom of his heart. Moreover, Green is now the Demon King, there is nothing wrong with it.

Seeing that the two stopped teasing each other, Saro Uth cleared his throat and said:

"Some things did happen shortly after you went to find the God of Light."

"What specifically?"

"Illness. Contagious diseases are spreading in the Demon Realm."

Upon hearing this, Green frowned and wiped away the smile on his face.

The surrounding air seemed frozen at this moment, giving people a sense of nameless pressure.

While admiring Green's momentum, Saro Uth continued to explain the reasons for the matter.

In fact, it was not a complicated matter. Similar situations had occurred in the Demon Realm before. Although the average strength of the demons far surpassed other races, in other aspects, such as medical care, they couldn't compare to the human world.

Not only because of the lack of resources, but also because of the physique of the demons themselves.

Most demons were strong and rarely got sick. It could even be said that the majority of demons would never get sick in their lifetime. However, on the flip side, once demons contracted an illness, it was difficult for them to recover, especially in the case of contagious diseases. For demons, it was indeed an extremely formidable enemy to deal with.

Similar events had occurred in history, and at that time, the majority of the demons who fell ill did not survive.

Now that such a thing had happened again, the three former Demon Kings were powerless.

"It turns out it's a large-scale outbreak of illness. This is a bit tricky. Although my source energy can heal injuries, it has no effect on diseases..."

Green's reaction was anticipated by Saro Uth and the others. Although demons rarely got sick, it was not easy to treat when they did, especially in the majority of the undeveloped areas of the Demon Realm, mainly due to dangerous beasts and plants.

Elsa had no hope in this regard either. She was well aware that Green could seek help from the human realm, but a disease that could kill demons would not be an ordinary ailment.

However, after some agonizing, Green suddenly thought of something, and the gloom on his face instantly disappeared.

"Wait, maybe there's still a way."

Green's brows relaxed as he smiled mysteriously at everyone.

At this time, due to the invasion of disease, there were very few outings in the demon world. After all, the infectious disease had been happening for many days, and one could easily get infected by casually wandering outside, which was basically a dead end.

Coincidentally, the leader of the conservative faction unexpectedly contracted the disease as well.

"It seems that my time has come to an end. I just don't know how Lord Demon King is doing now. If possible, I also want to witness the day when the demon world is changed with my own eyes... cough cough..."

At this moment, he had no idea what Green was doing.

Instead of directly expressing his thoughts, Green entrusted Saro Uth and others to spread the news in the demon world, that Demon King Green would eliminate this disease and safeguard the lives of all demon clans.

Even though they didn't know where Green's confidence came from, they still followed his instructions.

As the news spread, it quickly spread throughout the desperate demon world. After learning about this news, many demons who had contracted the disease saw hope. Even if they were being deceived, at least it ignited hope in their hearts.

Meanwhile, Green was silently contemplating that besides being able to fight against other species, the demon world was completely inadequate in all other aspects. There must be an opportunity to make it better, not just in terms of living environment, but in all aspects.

"Green, have you come up with a solution?"

"I'm planning to go back to the human world and see. If I remember correctly, I had commissioned someone to make special medicine. Barring any surprises, the medicine should be able to cure the disease that has infected the demons."

Elsa asked, and Green no longer concealed his plans.

"I see..."

"Hmm?"

Green looked at Elsa and noticed that her face was slightly flushed, but then he realized something was wrong.

Although it was just a little bit of flush, it didn't look like the blushing caused by shyness or other emotions. Instead, it seemed very abnormal. At the same time, Green also noticed that Elsa's complexion didn't look good and her gaze was unfocused.

"Elsa, what's wrong with you?"

Subconsciously, Green put his hand on Elsa's forehead and then leaned his forehead against hers.

But the next moment, Green was startled by the temperature of Elsa's forehead.

"Why is it so hot?"

Green's expression turned serious, and he quickly reached into Elsa's clothes, discovering that not only her forehead, but her entire body was abnormally hot, completely an unhealthy state. It was most likely that she was sick.

"I... I don't know... It just suddenly..."

Elsa only felt a wave of dizziness in her head, and then her whole body lost strength. Luckily, Green reacted quickly and caught Elsa's almost collapsing body.

This scared Green. Even if he infused source energy into Elsa's body, it was of no use.

He could confirm that Elsa was perfectly fine a moment ago, but he didn't know why she suddenly became like this.

Saro Uth and the others were still handling affairs outside, and Green didn't know the situation with the item for a while, but one thing was certain, it should be related to the sudden outbreak of the infectious disease in the demon world.

"Green, I feel so hot... I really want to sleep..."

"I know, I know, how could it not be hot? Just holding you makes me feel a little warm! But please, don't fall asleep!!"

Green felt an overwhelming sense of anxiety. His worry made him feel lost and helpless. Watching Elsa's face gradually turning paler in his arms, he even felt a sense of fear.

Suddenly, Green had an idea and quickly placed Elsa on the soft bed.

"Elsa, hold on, just a little longer!"

Anxiously, Green unbuttoned Elsa's shirt and placed his hand on her abdomen. The scorching temperature immediately spread from his palm to his entire arm, making his already anxious heart even more restless.

Right now, Green was very scared that Elsa would be gone like this.

If something like this really happened, he would never be able to live a happy life again.

Although the demon girl in front of him had little interaction with him before, she was willing to save his life through self-sacrifice. She even allowed him to evolve into a powerful demon king. In every aspect, her favor towards Green was immense.

Therefore, Green absolutely couldn't just watch Elsa suffer in pain.

Holding onto this belief, Green activated the power of the source within him. Golden light gradually emerged from his palm and entered Elsa's body, starting from her abdomen.