My physics masters couldn't possibly be grand mages.

"Good morning."

Einstein, dressed neatly, came downstairs and greeted Char.

"morning."

Char pointed to the steaming coffee on the table.

"Your coffee."

"Is he awake?"

"Outside." Xia picked up his coffee, took a sip, and pointed to another cup, saying, "This one is his."

Einstein picked up two cups of coffee from the table and went outside.

Char Aznable simply washed the hand-grind coffee machine and then followed him out.

Einstein sat in a chair in the yard, while Tesla stared intently at a holographic projection.

It's a 3D model of the burning hand.

When get out of class ended, Bourne passed the badges into everyone's badges.

The learning efficiency of 3D graphs is vastly different from that of 2D graphs. Xia believes that the Tower of Truth must be using this technology to ensure the stable operation of its "patented" system.

Otherwise, once someone learns this magic, they can teach it to the others at any time.

He stood there, seemingly lost in thought, one hand in his pocket, the fingertips of the other hand slightly curled, as if pinching something in the air.

Char glanced at Einstein. Einstein shrugged.

Just as I was about to speak again, Tesla suddenly moved.

He didn't turn around, but walked straight back into the house and took out a roll of copper wire from the small brown leather suitcase.

He used a knife to peel off the insulation, revealing the copper-colored core, and sat down on the steps of the porch to begin winding the wire.

One lap, two laps, three laps.

The copper wire bent into a flat spiral at his fingertips.

"What is this?" Xia asked.

"Electrodes," Tesla said. His voice was hoarse.

Einstein walked over with his coffee cup, glanced down at the spiral coil, and quickly realized Tesla's purpose.

"You want to produce hydrogen?"

"This magic is essentially an extension of the runes 'Energy Release' and 'Conversion,'" Tesla said. "The so-called conversion is simply the direct transformation of magic into fire. In my assessment—"

Tesla looked up at Einstein and said, "A way to downgrade high-quality energy into low-quality energy."

"But within the framework of human cognition, this is the most efficient way to use it."

"So I was thinking, could we use chemical energy to enhance the power while reducing the consumption of magic power?"

Einstein took a sip of coffee.

"The hydrogen concentration in the air is too low. The volume concentration is only 0.000055 percent."

"Let's try making it first."

He made a second one, placing two coils in the water, facing each other, with the distance between them exactly half the diameter of the coils.

He turned to look at Char, "Do you have any batteries on you?"

Xia was taken aback and was about to shake his head when Einstein spoke up: "Magic will suffice."

He raised his hand.

"Sizzle"

Blue and white electric light danced at his fingertips.

"Energy release and conversion," he continued. "If magic can be converted into fire-like energy, it can naturally also be converted into electricity."

Tesla's face showed a hint of interest. "What else can it be transformed into?"

"Sound, light..." Einstein paused, "The others probably need to be combined with the rest of the runes."

Tesla raised his hand, mimicking Einstein's method of converting magic into electricity. The spark lasted for half a second, and the air was filled with the smell of ozone.

He did not act immediately, after all, even the Burning Hand could harm the mage himself, let alone electricity, which is an even more uncontrollable energy.

He needs to think about how to avoid getting hurt.

The solution came to his mind almost instantly.

Among the runes inscribed last night was one with the functions of "shape-granting" and "stabilizing," including the shaping of energy.

Tesla did not touch the coil with his hands. Magic flowed from his palms, transforming into two invisible "wires" connecting the two ends of the coil.

The current flows out from the magic line in the right hand, passes through coil A, water, and coil B, and flows away from the magic line in the left hand.

When the two ends of the copper wire are inserted into the water, bubbles begin to appear.

Tiny bubbles rise from the surface of the copper wire, climbing upwards in strings, clinging to the metal surface. There are fewer bubbles at the positive electrode end and a much denser number at the negative electrode end.

Einstein put down his coffee cup and squatted down to look at the bubbles.

Then he raised his hand. Not to discharge electricity, but to perform "gas manipulation".

With a gentle flick, he drew the hydrogen and oxygen above the water's surface from the air, gathering them into two invisible clouds, which were then mixed together in a two-to-one ratio.

Throughout the entire process, his fingers moved only slightly, as if he were kneading an invisible dough.

"Char, you give it a try," he said, tilting his head towards the mixture. "Use the Hand of Combustion. No need to add oxygen for sifting."

Char raised his hand, but he did not activate "Gas Manipulation - Oxygen Screening". He only used the two runes: Energy Release and Air Shaping.

"call-"

The moment the flames came into contact with the mixture of gases, their color immediately changed from orange-red to bright yellow, with a glaring white tinge at the edges.

The air was heated to its maximum, emitting a sharp hissing sound.

A wave of heat hit him, hotter than usual, making Char's eyelashes curl slightly.

The mixture of gases was burned up instantly. The flames returned to their normal orange-red color.

On the ground, the grass blades were baked yellow and curled, but not charred black.

Einstein fanned the smoke in front of him with his hand.

"The temperature was about four or five hundred degrees higher than that of oxygen burning," he said.

Tesla crouched down and touched the yellowed grass.

"What about consumption? How's the consumption?"

Xia thought for a moment, "If the normal Burning Hand consumes 100, then the oxygen boost is 140, and this one is 98."

"The energy output has changed from flames converted from magic to the chemical energy produced by igniting hydrogen," Einstein continued, "but this doesn't include the hydrogen production."

He looked at Tesla and asked, "About how much magic did you use to produce hydrogen?"

Tesla frowned and silently calculated: "...a few hundred, I guess."

"The consumption is too great; raising the temperature by only a few hundred degrees is meaningless," Einstein commented.

"What if we produce it in advance, then store the produced hydrogen in a container and carry it with us?" Char asked.

Einstein suddenly realized, "You have storage space, so you can definitely do that, and time stands still inside, making it the ideal storage environment."

He paused, then continued, "But only you can afford to be so extravagant. The demand for hydrogen storage is quite high, and no one would carry such a bulky thing out into battle."

Tesla crouched down and brushed the yellowed grass leaves on the ground with his finger.

"A few hundred units of magic in exchange for a few seconds of hydrogen-oxygen combustion," he said calmly, as if stating the result of an experiment. "It's really not worth it."

He stood up and put his hands in his pockets.

"But this isn't the end. This only proves one thing—chemical energy can participate in magical reactions. As for how to make it cost-effective..." He paused, looking at Char, "that's the next step."

"We now need to solve two problems."

Tesla took a notebook out of the box and began writing his research plan on it.

"The first thing is to find a way to make hydrogen production simple, ideally so that it can be made and used on the spot during battle, or at the very least, it should be easy to make near water."

Secondly, it maximizes the use of hydrogen's chemical energy, generating greater power.

"But so far, the best way to produce hydrogen is by electrolyzing water," Einstein said.

Both of them fell silent, lost in thought.

"From a scientific worldview perspective, there is definitely no better way; if there is, it will be in the future."

Char spoke up at this moment, drawing the attention of the two.

He looked at the two people, his eyes flashing.

"But this world has magic..."