I created my own system

"Now can anyone explain to me the difference between a magical beast, a demon beast and a Devil"

"Once you explain this to me, I need to hear the word Metamorphosis and corruption in your explanation"

Professor Timothy started off.

"No one?...alright I'll call someone then"

He took the class list and was about to call someone when both Alicia and Apollo stood up.

"I can answer the question professor"

"I'll do it"

"Oh?...well that surprised me"

He slowly tapped his magic pen seemingly thinking about whom to choose.

"You, the boy with red-orange hair stand up and answer my question"

Apollo stood up like what the professor said then he spoke.

"First I'll differentiate a magical beast from a demon beast" he started off.

"A magical beast is a type of beast that harnesses the mana from nature, they can't handle ki like humans but their proficiency when it comes to magic is top-notch. They have innate abilities that are born from their species' countless evolution. Through the life of a magic beast, they experience countless phases of ranking. Once a magical beast reaches the rank of baron metamorphosis occurs.

Metamorphosis is when a magical beast begins to change their appearance and morph their body into a different structure. Sometimes they can achieve a human-like body or achieve a new appearance"

"Then what happens when a magical beast fails to achieve their ranking?

The answer is demonification or corruption.

There are many theories about the cause of corruption but we can start off with the first theory and the most logical one. The theory of mana, it is said that the abuse or misuse of magic can lead to corruption. Magical beasts that fail to complete their ranking would be consumed by their mana, ultimately leading to an alteration of the body's structure.

Once corruption has devoured their body, the little amount of consciousness inside them will disappear turning them into a beast that knows nothing other than devouring and destroying.

Then here comes devils, just like magical beasts, humans are also prone to corruption. However unlike magical beasts, corruption doesn't cause humans to run wild, it only changes them biologically making them look and live differently from humans. Humans' abuse of magic and usage of incomplete magic can lead to corruption making mana change their bodies into devils"

Apollo then breathes trying to regulate his breath from speaking for long.

"Good job student....." the professor said then he went through the class list and to his surprise he looked at Apollo strangely.

"Why is rank one here?"

"Because I want to professor" his simple answer made the professor chuckle before shaking his head a bit.

"Alright that's enough you may sit down"

"The reason I asked someone to explain the difference was to make sure none of you mistakes the three together. Especially a devil and a demon beast, they are different from each other, understood?"

...

The class continued until the clock struck at 11:30.

"That's the sound of the bell you may all take your lunch"

"Yes professor"

"Ugh!"

Aaron suddenly jumped when he heard a zombie-like moaning. As he looked back he saw Mckenzie walking sluggish.

"Hey you okay?" he asked worried about his friend's state.

"I am okay my brain is just not braining"

"Huh?..your what?" he was confused so he looked at Blair.

"Just leave him be he just lost 5 years of his life span while listening to Professor Gelda"

They went to the cafeteria afterwards and unlike their previous entrance that garnered hostile gazes this time, no one dared to look at them.

"I don't like this kind of treatment either" Casper said as he looked at the other student's fearful glances.

"Apollo should become more friendly from now on"

"Why do I need to do that"

He grumpily said while putting a breath in his mouth.

"Let's just try being nice it'll won't really hurt no?" Alicia suggested so reluctantly Apollo agreed.

Their lunch ended without a hitch and so when the clock struck 1:00 pm they gladly returned to their classroom.

"Good afternoon students I believe you already know me but I will still introduce myself again. My name is Professor Adolfo Emberfall your class professor. My subject is advancement and physical training"

Apollo was a bit concerned with the excessive grin of the professor however he decided to observe first.

"Since we are doing physical activity let us head to the third floor"

He urged the class who immediately followed him.

"Now then please wear this"

As soon as they settled themselves inside the Duel room their professor immediately put black bracelets on both of their wrists.

[Warning! These bracelets can seal all your attributes

Warning! Creator the bracelets have sealing property

Proceed to cancel the effects of the bracelets?]

Before Apollo could give a command Adolfo finally explained what was going to happen.

"Those things on your wrist are called sealers they seal a part of your attributes"

"The subject advancement and physical training is only exclusive to your class, no other classes offer this subject so be happy"

Then his eyes survey the confused students who seem not used about the turn of events.

"The sealers will only seal one or two attributes that are higher than the rest. Then we will train the attribute that needs advancement the most"

He then took a folder which summarized the status of each student.

"For Agnes, I'll seal your mana" he then waved the pen he was holding making the sealers activate.

His words continued to take command until they went to Apollo. This time his smile made the kid in front of him suspicious.

"For you Apollo Lionheart"

He raises his pen making the two sealers on each wrist of the child glow.

"All attributes sealed"

"!?"

"Wait wh-.."

He wasn't able to finish what he was about to say when gravity magic suddenly activated from the sealers.

"Ha....ha..ha"

Apollo was forced to gather his breath as he felt the increased weight of his hands.

[Proceed to cancel the effects of the bracelets?]

"It's okay I am fine"

He tried to walk but failed.

"Now then let's get the lecture started" he waved the pen again and the Duel room became a maze. Walls suddenly emerge from the ground dividing the room into different spaces.

"We are going to have a game called hide and seek if I catch any of you..." his voice became strange as the students failed to trace its source.

However, as they tried to find their professor they felt a subtle sound of breathing behind them. As they looked back a man wearing his usual black waistcoat and shirt outfit came smiling at them.

"You are dead" he completed his words making all fifteen students run across the maze.

"Hmmm?... What happened to you student Apollo?"

"Please wait...hooo"

He tried to walk however his hunchback and slow phase of walking made it look like he was an old man trying to find his cane.

"Pfft"

"Please don't laugh you made me walk like this"

"Oh right I am sorry I'll give you five minutes before I start the game"

While walking slowly Apollo kept hearing the same messages over and over again.

[Proceed to cancel the effects of the bracelets?]

[Proceed to cancel the effects of the bracelets?]

[Proceed to cancel the effects of the bracelets?]

"Shut up and let me think"

He pulled his feet again before planting it down on the ground.

Apollo closed his eyes and immediately tried to activate his mana.

"I can't use it"

But the boy didn't stop there he closed his eyes again and noticed his ki being free for him to use.

However, there is a slight problem Apollo's use of ki is not even close to average since he had barely tried upgrading his skills in it. But still, the boy tried his best to his ki to elevate his current situation.

"Good you are doing great Apollo, your use of mana is superb but when it comes to ki you are still a novice, this training may help you out a bit"

Then he waved his pen again and a series of screams echoed when the lower class found themselves falling into traps.

"This will be a good warm-up for them"

For an entire one and half hour, all the students did was run and hide. When they got caught by their professor their sealers would activate its gravity spell making it hard for them to move.

"I am tired...."

Sixteen students lay on the ground exhausted even Apollo himself was surprised to be tired.

"That is all for this lesson you may proceed to your next class" Professor Adolfo said before waving his own again to retrieve the sealers.

"Damn, we still have another class... I am tired"

Niko complained while massaging his sore legs.

"Apollo you okay?"

Alicia asked since it was her first time seeing him tire like this.

"Yeah I am fine"

He manages to say before taking out a potion from his space ring.

"Let's go back to the lecture room our professor might be waiting for us"

As soon as the effects of the potion activated he immediately stood up and urged his classmates to come with him.

"Man, I seriously want that potion as well" Samael thought while trying to move his body.

Then for the following weeks, the class was tormented by Adolfo's unique way of teaching