"Let us continue where we left off," Helen announced as she twirled the stylus in her hand.

Instantly, several files were uploaded to her student's digital desks. They gleamed a scholarly blue, floating just within one's peripheral vision. A simple title adorned each file. 

Basic Sorcerer Anatomy. 

Temperature and Energy Capacity.

Choosing One's Clothes.

Each file contained a few pages worth of diagrams and textual content. Every important term had its own colour, corresponding to a certain theme of information.

"Now, all of you have already discovered that an Energy Sorcerer's body heats up like an engine when used; A sorcerer's eyes will start glowing in the same colour as their energy and even their blood vessels will shine from beneath their skin. As the quality of a sorcerer's energy can be discerned based on colour, it is easy to gauge someone's strength the moment they act. How do you think Energy Sorcerers keep this fact hidden from the demons and other sorcerers?" Helen pulled up a picture of an Energy Sorcerer in the midst of battle. The same picture manifested before every one of her student's eyes.

It was the image of a Barrier Mage, protecting his comrades from the rain of Hellfire that the demons wielded. The mage's energy shone in a fierce, but unassuming white light, gleaming from his eyes, blood vessels, and from the forcefield of his creation. Only a slight trace of purple flashed past his gaze every now and then. The battlefield around him had been torn apart. Buildings had been toppled and corpses lay all around the limited range of his shield.

He was at wit's end, but the world around him was motionless, and so was he. He was but a remnant of history.

Until Helen tapped on the image.

A wave of heat bloomed from the virtual existence on everyone's screens. A guttural growl shook the hearts of every student in the room as they watched the Barrier Mage pour every ounce of his being into his shield. Wave after wave of Hellfire rained upon the man, but the flames of his heart burned even fiercer. His comrades—the Blasting Mages who were shooting down as many demons as they could—were his only hope of survival.

"This man here is one of Aquamarine's Heroes, Mt Hinsha. One of the greatest Barrier Mages to have ever lived, and still lives through his legacies today. His name bears the title that only mountains have, signifying his contribution to our race." Helen paused, allowing the video to continue playing. Sweat beaded down the faces of her many students, her words slowly sinking into their minds.

After a moment, a student posed the question she had been waiting for.

"Why does the greatest Barrier Mage in the world have the same mana quality as a slave? Didn't Mt Hinsha have the King's energy?" Confusion laced the student's expression. The disbelief made apparent by his heavily creased brows was a sight to see. "I can't see even a trace of purple in his barrier!"

"Exactly. Mt Hinsha's energy was indeed the colour purple—the purple of Kings. However, for the sake of his mission at that time, he could not reveal himself as one of humanity's powerhouses. He had to manipulate the appearance of his own energy. Otherwise, he wouldn't have been able to impart his legacy to his disciples. Based on the files on your digital desks, can anyone deduce exactly how he did it?"

He had to answer whenever he knew of concepts that others did not know of.

Unfortunately for him, the closest person he could call a friend had great intellectual abilities. Seraphina was a wonderful combat partner given her ability to deftly collect and process information—something that Areii lacked, apparently.

The requirement for intellect is much higher in Aquamarine than on Earth... I guess it makes sense given the difference in technology. He had thought at the time. He was already considered an analytical person on Earth, but here on Aquamarine, he was basically average.

The only reason why his written tests were excellent was because he had much greater experience than his peers.

Perhaps fighting in the Underworld for so many years had dulled my intellect to sharpen my intuition. Areii sighed as he stood up and walked to the front of the class. He closed his eyes, fully prepared to make a fool of himself as per Helen's usual spiteful teachings.

It had stopped when Areii and the nobles had been ignoring each other, but it had resumed when Seraphina became his combat partner.

Areii breathed.

[Coating], huh? He secretly smiled, Martial Artists have a similar concept. 

'Aurae Silencia.'

A subtle heatwave washed across the room as Areii roiled his energy to life. With every beat of his heart, his energy would circulate, awfully similar to the movements of a [War Saint]'s Blood Aura. With such a familiar sensation, his commands were all carried out like flowing water. It was almost instinctual for him.

Areii's energy wafted out. His formerly yellow energy slowly but surely lost its lustre, moving one level down and turning white. Before it could continue its descent, however, Areii locked his control into place.

Let's stop at that. 

He wanted to keep a few cards hidden. Yet, hush murmurs had already spread throughout the crowd. With a side-long glance, Areii spotted a dazed Helen Montclair. It was clear to him that she had not expected him to carry out the technique already. What should have been a humiliation for him had turned into a moment of glory.

Areii couldn't help but revel in it despite his apathetic demeanour.