It feels like us defeating the minotaurs was too fast. In just a few hours, we finished the job, and I reported the news right away to the shocked receptionist. They don't believe me right away so they gave a request to some hunters who can fly to see if we really finished the quest or not.

Well, that doesn't matter to me. I just did as the request said, and reported back to the guild. The village chief has given me the reward, and there will be some more from the guild. But I had to wait a few days until the hunters they sent returned.

On Saturday, the hunters returned just as I was about to teach medical lesson. They were shocked that I was right. Am I really so difficult to believe? Which part of me makes other thinks that I can't be trusted?

Anyway, after taking the reward from the guild, I left to the hospital along with Kayla who will be my assistant as a healer and Sophie. I used my privilege to bring her with me even though she's just a first-year student. Since Dean will be attending as well, no one can complain as long as he permitted it.

And on the way, we met Sara who is going to the hospital as well because of my invitation. So, the four of us went there together. Since Sara and Kayla were both earth mage, they have something in common to talk to. And it was Kayla who taught her earth magic during the training camp. They are pretty close.

In the hospital, we met Dean who brought us to the operating room. During this period in time, the operating room was mostly used to amputate patients' limbs. Not reattaching limbs back. And that's what I'm going to do today.

Inside the operating room, there are many people, mostly old people, who want to watch. Some of them complained and say that I'm too young.

"If you're here to complain, then leave. I'm here to teach, not to listen to complains."

Unlike during other times, this lesson will improve the survival chance of the patients. There's no way I would joke around at this time. It's time for me to get serious.

Some of the people here were angry at my remark, but Dean shut them up. Though few of them actually left the room. That's much better since the room is too stuffed.

Though there was one person who curiously asked me something. And since it's not a complain but a serious question, I answered honestly as well.

"Why do you bring your own healer? I'm a healer and I'm her professor in her class as well. And I'm also a doctor. Can't I be the healer if you need it?"

It was a man in her forties who asked. If he looks twenty years older, I might realize who he is. But that doesn't matter. What matter is the answer to the question.

"Depend on your ability. You might be able to, but I don't know how good you are in healing. And that's why I think it's better if I bring my healer with me. If you wonder what I'm saying despite all your knowledge and experience as a healing element professor, I'll proof it to you."

In front of everyone, I had Victoria made clones of Blobbies, and turned some of them into two scalpels. Then one by one, I slashed each of my own arms. Left one first, then right one.

"Ouch! It hurts! Now, can anyone here who is a healer heal only one of my arms?"

I asked everyone. Seems like that man is not the only healer here since I can see some other people reacted.

Usually, healer can only use healing magic that targeted someone's whole body. Even the weakest healing magic can only target the whole body. So, everyone who think that way shook their heads when hearing my question.

"It was known commonly that no one can heal only one part of the wound. But Kayla can do it. Kayla, please heal only my right arm."

I asked Kayla to heal only one part of my body. And with only a light healing magic, the wound on my right arm is closed and healed.

"See? Do you know what it means?"

I totally acted like a teacher here.

"…that mean while performing surgery, the healer won't accidentally close the wound and makes the operation easier since the healer can heal any part that shouldn't be wounded. Like if the surgeon accidentally cut too deep." The doctor who asked replied.

"That's right. Though the reason I'm here is to teach everyone medical treatment that doesn't necessarily need healers to help. But healers are important as well to increase the chance of survival to the patients. You can ask Kayla about healing magic later."

This way, these professors and doctors will have to ask Kayla later about healing magic.

"Like I said, I'm here to show you how to do it without the help of any healer. But there's a need for another mage that can raise the chance of survival. It's air mages. I'm also an air mage, but since I was appointed as lecturer, I will have my student to do it. If any of you are air mages, or have acquaintances who are air mages, this will help a lot. Can someone bring the patient?"

I heard that for the healers, the entrance exam was to heal goblins. But this time, the patient is a human.

It was someone whose arm were cut from a monster. The patient arrived yesterday afternoon, but I told Dean to not do anything to the patient other than healing the arm so the bleeding stopped, and froze the separated arm that is luckily brought back by his party members.

I told Sara how to create anesthetic gas to make the patient sleep and to not feel pain during the operation.

"That was a gas made of air mages to make the patient sleep and won't feel any pain during the operation. Air mage can put these gases inside a strong container so it won't leak, and let the patient breathe it before surgery. I want to get my air element students to learn this, but there are too few people attending my class. So, at the moment, the supply of these gases is extremely limited. If there are any medical students who are also air mages, tell them to attend my air element class on Monday. I'll tell Dean to allow them even if they are not a student of the magic college as long as they are either doctors or medical students."

Again, as long as it's related to saving people, I am serious. Though In battle, I will prioritize my own life first. That's why I have to spread my knowledge.

I heard from Dean that among these people, some of them are quite famous for writing books about medical knowledge. It's good for them to spread my knowledge in their books. Especially since I'm terrible in writing.

I performed the surgery slowly and carefully, while explaining things at the same time as well.

"Time is of essence here. It's better to be fast and precise. But since we have a good healer here, I performed this operation slowly so you can understand it."

I also told them the importance of medical tools' hygiene. Since I'm using Blobbies that can absorb dirt, I'm fine. But the others need to know the danger of using dirty tools during surgery.

"Can the separated limb be replaced by other people's limb? Or even other species?" Someone asked me.

"I don't know the exact detail as further research need to be done. But I think it's good if we used other people's limb as long as they have similar blood type. There are several blood types differences, but I still don't know everything yet. If you have the resources to do it, please research it. We can save more people if we know about blood types."

I didn't know this before. In my previous life, someone tried using other people's limb to attach it on someone. But the result was bad.

I know about this knowledge from Victoria. In her world, they already know about difference in blood types. She doesn't know how they can find the differences since it was tested in the hospital, but she's confident about the fact that there are different blood types. And I believe her.

If I use my Divine Vision to see a closer look at the blood, I might be able to differentiate between blood types. But to explain it to someone will be difficult unless I told them that I'm an Aura user with vision ability which I want to keep as a secret.

I finished the surgery as neat as possible, and with Kayla's healing magic, the wound is closed without any scars. Then I told someone to let the patient rest and have someone watched over his healing progress. Several doctors volunteered to do it.

After answering some questions, we left the hospital. That makes the end of my first class about surgery. I hope they will do research about the difference between humans' blood type. Just knowing that alone will improve the chance of survival.