My physics masters couldn't possibly be grand mages.

Xia frowned slightly. Although he didn't quite understand, he could sense the complexity of the term "timing control" just from the words "timing control".

Tesla's words continue.

"Even in reality, the most likely thing to be realized is still the railgun, but its energy efficiency is extremely low."

When an electric current passes through a conductor, the conductor's resistance converts electrical energy into heat energy. In the experiment, the electromagnetic railgun's guide rail melted and deformed after only a few shots; this is the primary factor limiting its performance.

He paused, his deep-set eyes reflecting the glow of the sky.

"Unless we can develop a superconductor with zero resistance."

"But..." Tesla slowly raised his hand, magic seeping from his fingertips and condensing into a pale blue, slightly pulsating light in the air. "Magic itself is a one-time use, so there is no need to worry about burning it away."

"Our first priority is to get a 'cannon barrel'."

"But how do we do that?" Char asked. "In reality, electromagnetic rails are two parallel metal tracks that conduct electricity. Do we also need to use a magnetic field to condense the metal?"

Tesla did not answer immediately. The magic was being "shaped" before him, gradually forming two pale blue bands of light, like two parallel auroras. The bands were very thin, only about the width of a pencil, but with clear edges and a spacing just wide enough to accommodate a ten-millimeter bullet.

Xia held his breath, staring at the two suspended bands of light.

"Do you remember that wizard named Bourne?" Tesla said.

Char nodded.

"His Lightning Hands, though flawed and energy-intensive," Tesla said, his gaze fixed on the two bands of light as if examining a work in progress, "but his idea of ​​using magic as a conductor is still quite ingenious."

He paused.

"But unfortunately, he used the wrong approach. In order to ensure the speed of the Lightning Hand's attack, he used this magic conductor in a way that was similar to casually scattering 'powder,' allowing the lightning to spread along these 'magic conductors' in the air, but he still lost a lot of energy."

Magic, as a form of higher-level energy, does not generate resistance as a conductor.

Its actual usage should be...

Tesla raised his hand and placed the projectile on the newly created rail, while simultaneously channeling magic into the conversion rune to transform it into electricity.

"Sizzle sizzle—"

The leaping electric light shone on Tesla's face.

"laugh-"

The bullet was launched instantly, but it only traveled a few meters before landing limply on the ground.

"This is the second reason why electromagnetic railguns are difficult to implement," Tesla said. "The energy required to launch an electromagnetic railgun is not large; the problem is the instantaneous energy, which requires releasing at least five or six hundred units of magic power within a thousandth of a second."

"How is that possible?" Xia frowned. "Does it mean we have to use it in conjunction with Einstein's thought acceleration?"

"Even with accelerated thinking, it's impossible to release so much magic in a fraction of a second, and the magic channel doesn't allow it either," Einstein, who had been standing silently in the back, suddenly spoke up.

Just as different network cables have different speeds due to different bandwidths, the "bandwidth" of magic within the human body limits the output power of magic.

The magic channel widens as the rank increases. It is impossible to output such a huge amount of magic power at once with the magic output power of the second and third ranks.

"However, we have also solved the most important problem."

Tesla said, walking over and picking up the aluminum bullet that was slightly hot from the ground due to the electric current.

"The main reason why railguns waste more energy than coilguns is that the current heats up due to resistance when passing through the metal rails, resulting in a significant energy loss."

However, the virtual orbit formed by magic is itself a superconducting orbit, which solves the problem.

Secondly, there is the frictional heat generated by the mechanical contact between the projectile and the guide rail.

Tesla thought for a moment and said, "The next version can use magic to wrap the projectile, creating an effect similar to magnetic levitation, so that it does not directly contact the guide rail and there will be no frictional heat."

He glanced around at Einstein and Char.

"In theory, it has a higher potential than a coilgun. It has a simpler structure, higher initial velocity, and is easier to control."

"But how do we solve the problem of instantaneous output?" Xia asked.

Tesla frowned and paced back and forth in the yard, his boots making a rhythmic sound on the stone path. Suddenly, he stopped, his gaze falling on the stream in the distant valley.

The stream is not wide, but its flow is not slow, washing over the rocks day after day.

"Dam," he said.

Xia was taken aback: "What?"

Tesla turned around, his gaze intense.

That's the expression on an inventor's face when inspiration strikes.

"A river's flow is somewhat fixed, but a dam can store water and release it all at once when needed, generating a huge impact. We need a 'magic dam' to pre-store the magic in a container and then release it instantly."

Tesla's eyes lit up: "A capacitor. We need a magic capacitor!"

Char Aznable understood Tesla's meaning, his eyes brightening even more. "Use Stabilization and Shaping to create a magic storage container, store the magic inside, and then use the Conversion Rune to instantly convert it into electricity when needed!"

Tesla didn't speak; he had already begun to try. He slowly raised his hand, and just like before, he constructed two virtual tracks, then wrapped the projectile in magic and placed it on them.

At the same time, he condensed a ball of magic power next to him, and used shape-granting and stability to fix the ball of magic power to the ground and connect it to the track. In the middle, he used stability to fix a "conversion rune".

Finally, he put on the perception rune, which was temporarily set to infuse magic into the conversion rune when a shooting command was given.

It may seem like it takes a long time, but once it's solidified into a "configuration," the entire system can be completed in a short time.

He made a seven-shaped gesture towards a tree not far away, which could also be described as a gun gesture, and moved slowly while controlling the trajectory.

Then, he gave the order to fire.

"Sizzle sizzle-"

"call out!"

A large amount of magic power was converted into electricity, and then the bullet was accelerated again and fired.

This time, the bullet accurately hit the tree not far away and embedded itself in the trunk.

"Did you succeed?" Xia asked.

"No." Tesla shook his head. "This isn't the power an electromagnetic cannon should have; it's not even as powerful as some second-tier magic."

"The conversion rate is still too slow." Einstein walked over at some point and looked at the tree. "Even if the process of converting magic from the human body is shortened, the process of inputting magic into the conversion runes is still too slow."