My physics masters couldn't possibly be grand mages.

Byrne's tone was calm, revealing no emotion, but anyone with a discerning eye could hear the displeasure in his words.

The Tower of Truth holds a prestigious position in the magical world; even the Golden Family sends their children to this school, and as a professor there, Bourne is clearly proud of it.

Despite having so many professors and teachers at the university, Einstein insisted on finding a teacher from outside, which clearly demonstrated his distrust of the teaching quality at the Tower of Truth.

This is practically a slap in the face to all the professors and teachers at the Tower of Truth.

Xia quickly realized this as well, but he still silently complained to himself.

Even if Tesla was indeed brought in because of disbelief in the school teachers, isn't that because of you?

If you taught properly in class, people wouldn't have this kind of thinking.

Bourne looked at Char, "I just saw your student browsing the configuration list. What configuration were they looking for?"

"Related to lightning," Xia said, "but there don't seem to be many in the public domain."

"If you look for fire-attribute lightning magic, you'll find many, but they're mostly high-level spells," Byrne said calmly. "Many years ago, people's impression of lightning was inseparable from fire; lightning was the fire of heaven. It wasn't until the last hundred years, with the rapid development of technology, that people began to discover that lightning has different properties."

He raised his hand towards Xia.

The next moment, Xia heard a notification sound in his ear.

In the configuration column, a new configuration has appeared at some point.

[Lightning Hand]

"This is the configuration I created for my students," Byrne said. "It has an attack range of three to five meters, can paralyze people, and if the power is high enough, can cause cardiac arrest. But its best use is for control; nothing is faster than lightning."

Einstein glanced at Char and then said, "Thank you, that's kind of you."

"Could you send it to me so I can take a look?" Tesla suddenly asked.

Byrne raised an eyebrow, flicked his finger, and transferred the design to Tesla's emblem.

Tesla raised his hand to open the 3D projection of this configuration and the main data.

"More than three meters, and it consumes twice the magic power of the Burning Hand."

He looked up at Byrne, "The cost-effectiveness isn't very high."

Byrne's lips pursed slightly, though he hid it well, but anyone with eyes could see the displeasure on his face.

"Lightning magic has historically been exclusive to high-level mages because it is fire from the heavens and requires immense magical power to use."

Tesla nodded in agreement. "Air is not a conductor. Lightning requires a huge voltage to create a conductive path. This process is called 'breakdown,' and it consumes a lot of energy. According to normal data..."

He silently did the math in his head, "It would take several million volts to hit a target three meters away, and that would consume thousands of units of magic power."

Tesla examined the configuration once more. "Using magic to disperse certain conductive particles to reduce voltage requirements and magic output, you're very clever."

Bourne's brow relaxed, and he let out a nasal sound.

But soon, he heard Tesla continue, "But it can be better."

"What?" Bourne didn't react for a moment.

"We can simply use gas to manipulate the runes," Tesla continued. "It can also be maintained in the second dimension."

Byrne frowned; he understood what Tesla meant.

"Using gas manipulation to remove all the air from the current channel? I tried that a long time ago, and it was completely useless..."

Tesla shook his head. "Ultra-high vacuum lacks free electrons and ions, requiring extremely high field emission or surface breakdown to conduct electricity. The breakdown voltage is far higher than that of atmospheric pressure or low-pressure gases."

He paused, then continued, "It's about removing some gas, not creating a vacuum, but rather creating a low pressure at a certain level."

Tesla slowly closed his eyes and entered a meditative state.

Bourne didn't speak; he knew that it was this being before him that was creating the configuration.

After a period of silence of more than ten minutes.

Tesla opened his eyes, slowly raised his hand, and arcs of electricity crackled on his palm.

A blue-white arc of electricity leaped from his fingertips, shooting out five or six meters like a precisely guided laser beam.

The crackling of electricity startled some students in the library, who gasped and looked over with suspicion.

Bourne stared intently at the trajectory of the electric arc, his pupils contracting slightly.

The air seemed to still carry the scent of ozone, telling him that what had just happened was not a hallucination.

He was a fifth-order cultivator, so he could clearly sense that Tesla was only using second-order magic power, and that the consumption was far less than his Lightning Hand, almost on par with the Burning Hand.

To unleash such a lightning bolt with such energy expenditure would be impossible for any mage in the Tower of Truth.

This is especially true for a mage like Byrne, who has studied lightning magic for over a decade.

Tesla's response followed.

"The breakdown voltage of a gas does not decrease monotonically with decreasing gas pressure, but rather has a minimum value. Whether it exceeds or falls below this minimum value, the required voltage will increase. This is called...Paschen's Law."

A certain silence fell over the library as Bourne gazed at the thin old man.

In his perception, the old man's magic power was only slightly above the second level, but it only took a few minutes to rewrite his structure.

He couldn't sense any aura of a powerful mage from the old man, but the vast and profound knowledge and wisdom emanating from him easily overwhelmed him.

Like Einstein.

Bourne's breathing slowed slightly.

Was it Einstein who taught him?

No, if that were the case, Einstein would have had no reason to invite him to teach his students.

Therefore, it's more likely that...

The old man before them was also a sixth-tier cultivator...

Bourne quickly recalled his earlier confusion at the service desk.

He originally thought that Einstein had brought this entity in.

But thinking about it carefully, he also came by airship.

If he has the ability to ignore the barrier of the Tower of Truth, he can certainly demonstrate that ability.

In that case, Byrne wouldn't even have the thought of provoking him—because he would immediately understand that Einstein and Meredith were not on the same track at all.

"Mr. Wilvesen."

Tesla's voice pulled Byrne from his thoughts.

"Thank you for the design; it gave us a lot of inspiration."

Byrne snapped out of his daze, the barely perceptible stiffness on his face quickly replaced by a professional calm. He nodded slightly, his lips twitching in response.

At that moment, seven or eight magicians dressed in gray robes poured into the reading area, and they quickly focused their attention on Einstein's table.

"Magic is not allowed inside the building," Byrne explained, glancing at the group of mages. "Please be careful next time, or you'll be fined."

After saying that, he turned around and walked towards the group of magicians.

His steps were steady, just like when he came.

But beneath the hem of his robe, his hand clenched slightly.