Kaidō

"Hello students, I'm Retsu Unohana captain of the Fourth Division in the Gotei 13," Unohana said while gently standing in front of the students.

She looks around and sees Xin looking at him far, she smiles at him while Xin smiles back at her.

Xin who did not expect that she would come to teach them Kido was surprised, then he remembered that Unohana is one of those who are skilled in using Kaidō.

There is also another one who is expert at using it but that person is a maniac, almost all the people are scared of him because of the experiment that he is doing.

The 4th Division is the medical/supply division. They are responsible for both treating the injured and doing most of the manual labor, such as cleaning the Seireitei.

The 4th Division is further divided into teams that have specific assigned jobs. Other division members use their spiritual power only for fighting.

Members of the 4th Division possess spiritual powers that are used to tend to wounds and provide relief. They use these special powers and the benefits of their daily training to act with precision and speed to aid injured comrades.

4th Division administers emergency first aid to injured division members and transports them to the General Emergency Relief Station.

Unohana then starts teaching them about Kaidō, the requirement on using this ability is simple, you need to have Reiatsu and that's it.

They are all required to at least know how to use it in the case of emergency, each should have been skilled enough to at least heal a simple injury.

While all of them are practicing, Xin notices that Kiba and Renji are having a hard time using Kaido. It seems that these two don't have the ability to use it properly.

Meanwhile Momo and Rukia are showing the potential of being skilled using Kaido, they both already know the essence of this Kido in just a short amount of time.

While Xin, well he already knows how capable he is, he is just scared to use it because it will cause a large commotion.

Unohana who looks around observing all the students notice Xin, while the others use their ability to practice.

Xin on the other hand is writing something in his notebook, Unohana looks in front and sees that she didn't write anything, so she was confused, what is Xin doing?

She walks closer and silent appears behind him, she doesn't look and sees Xin writing some complex thing.

When she looked closer she was amazed that Xin was actually writing a complex Kaido spell, not only that it's already on the step that the kaido can already use.

Xin who seems to notice someone looking at Xin turns around and sees Unohana leaning behind him while looking attentively at his notebook.

They are to close that Xin smells the unique smell of Unohana, even her warm breath is already touching his cheek.

"What's that matter Nee-chan?" Xin whispered so that she is the only one who can hear it.

Unohana snapped out and whispered," What's this Xin?"

"Kaido spell,"

"Kaido spell? If I'm not wrong, there's no Kaido spell available in Soul Society?"

Xin nodded then started to write again, he said," That's right, there's no Kaido Spell other than the technique of how to use Reiatsu to heal."

"That's why i decide, why not make Kaido spell to make healing other more convenient,"

Xin's hand starts to fly to the paper while the new Kaido starts to show its original form, it's now complex Kaido but the structure of the spell is pretty unique.

After five minutes, Xin finally put down his pen, he looked content seeing the new spell homemade, he then said," This is the Healing Spell that I made."

"Its name is 'Way of Healing # 1: Healing Slime'," Xin proudly said.

Unohana smiled gently and said," Can I see it?"

"Sure," Xin passed his notebook to her.

Unohana took the notebook and looked at the spell, seeing that there seems nothing wrong about the spell she tries to use.

"Way of life, the water of life, the source of life on the earth and in the land, the great water undine who help and heal who needed them,"

"Way of Healing # 1: Healing Slime"

A blue round slime appears in front of Unohana, not like other slimes that she usually sees, the slime in front of her looks like a jelly slime.

She can also smell the cooling aura coming from the slime, that it's good for those who are gravely wounded.

Not only that, the slime is also made from concentrated Reiatsu that can heal any wound after applying to the patient.

Unohana took the slime and looked carefully, the slime is not wet but it's cold, and the funny thing is, the slime is pretty adorable.

"You can use this slime to heal for about 1 hour until the Reiatsu inside dry up or used, then you need to make another one if you want to continue to heal,"

"Not only that, you don't need to command the Slime, because the slime will walk to the one who is injured and heal it automatically."

Unohana cancels the Kaido and smiles at Xin," You made a great contribution this time Xin, this new Kaido is pretty useful for us who lack healing spells."

"Don't mention it, I just made it because of curiosity," Xin said.

Unohanad then continues the lesson, this time, she teaches the student about the new Kaido spell the Xin made, of course, she did not tell them that this spell is made of Xin.

After all, she still needs the approval of the Captain Commander about this, but well the spell is pretty useful so using it on lesson is not bad at all.

The day continues, after a week, Xin gets the approval of the Kaido that he made, and he also becomes the youngest Kaido developer in our society.

Of course, Xin asks for them to hide his name, he wants to be low-key as possible, Xin knows that there's an enemy lurking inside so he needs to be careful.

After a day, his new Kiado becomes the main spell of the 4th Division, not only is the spell useful, it's also pretty effective.

It makes the job of the 4th Division more easily while making their job faster and efficiently.