My physics masters couldn't possibly be grand mages.

"It couldn't get through that armored vehicle because it had ceramics inside."

"Ceramics?" Xia frowned. "Why?"

Einstein did not answer immediately, but instead picked up the chalk with his right hand. The chalk hovered above the blackboard for two seconds, as if he were organizing his thoughts.

Then he put down his pen and wrote three words:

Superfluid

He took a puff of his pipe, slowly exhaled a cloud of smoke, and squinted slightly in the swirling smoke, his thoughts seemingly drifting back to a certain time in the past.

"In 1924, Satyendra Nat Bose sent me a groundbreaking paper that challenged the conventional physics assumption that 'microscopic particles can be distinguished'..."

"I personally translated it into German and published it, based on this prediction: when a certain atomic gas is cooled to an extremely low temperature, all the atoms will suddenly condense into the lowest energy state, forming a new state of matter."

Therefore, this new state of matter was named "Bose-Einstein condensate", or "BEC" for short.

"To form a BEC, a specific gas must be cooled to a level less than one-thousandth of a degree above absolute zero."

Einstein drew a checkmark on the "near absolute zero" with chalk.

"It behaves like a superfluid, meaning it has zero viscosity. It can flow through extremely small gaps without resistance. The walls appear dense, but there are huge gaps between the atoms. It can easily pass through these gaps."

"But it can also act as a macroscopic condensed state, carrying kinetic energy with mass and speed to impact armored vehicles. It's like a water balloon; water can pass through gauze, but when a water balloon hits your face at high speed, it has a lot of weight."

"Then why can't it penetrate ceramics?" Xia Ya pressed.

"Because ceramics have a dense and highly ordered atomic arrangement. This structure may form a barrier that BEC cannot penetrate using its 'superfluid' properties, and there may also be factors related to the absence of free electrons."

Einstein stared silently at the blackboard in front of him. "As Cindy said, this is a...weapon."

"So the possibility of extraterrestrial civilizations is actually higher?" Xia said.

Einstein did not respond. He frowned slightly, as if deep in thought, then relaxed.

"At least in my understanding, BEC is a rather fragile state, and it is simply incredible that it can remain in this state for such a long time and even move flexibly."

Moreover, according to your description, those black tides, giants... these don't seem like a technological civilization, nor do they seem like a purely biological civilization..."

"The universe is so vast, it's quite reasonable to have some strange and unusual civilizations," Xia said.

"The universe is vast, that's true." Einstein took the pipe out of his mouth and tapped it lightly on the edge of the table. "But the laws of physics are consistent."

"No matter which galaxy or civilization, electrons will not suddenly become positively charged, and the speed of light will not become two meters per second. The second law of thermodynamics will not be abolished just because someone is more advanced."

Most importantly, the "rationality" of intelligent civilizations will not change.

As if the more he thought about it, the clearer it became, Einstein took a few steps and looked intently at Char.

"The giant forest you mentioned that appeared that night—they were clumsy and slow-moving, but they could fire high-energy beams..."

He wrote a word next to the giant: [Irrational Platform]

"If it's long-range fire support, it doesn't need to have two legs to get to the front line; there are many better ways to move."

For assault forces, slow movement means they are easily targeted and destroyed by enemy fire.

If it is a deterrent force, then it should be more robust and harder to destroy, rather than relying on beam weapons as its primary output.

A rational civilization would not create such irrational life.

He looked at Xia, "The most crucial point is that, given the power this 'civilization' possesses, it could have completely annihilated you, yet it still gave you breathing room and space to survive. Why? Why can they only operate at night and not during the day? With their technological capabilities, couldn't they simply turn 24 hours into night?"

Einstein's series of questions left Char completely bewildered.

In 2072, he was thinking about how to survive; in the magical world, he was thinking about how to become stronger. He had never really thought about so many other things.

However, Einstein quickly provided the answer: "They follow certain 'rules'."

Char's brow furrowed even deeper. "What rules?"

"Earth, or rather... the rules of the world," Einstein murmured softly. "They are not extraterrestrial life, but rather something that exists on Earth itself. Some force is restraining them..."

After a brief silence, Einstein exhaled a heavy breath and sat back down on the sofa.

Then, he said something that sent chills down Xia's spine.

"It's extremely difficult to create such BEC individuals using normal technological methods, but what about... alchemy? What about magic?"

Xia stood frozen in place, feeling as if the whole world had gone silent. His head was buzzing, and he didn't know what he was thinking. He just subconsciously turned his head to look out the window.

I looked at those elegant and beautiful Towers of Truth buildings.

"You..." Xia's throat was a little dry, "What are you thinking?"

Einstein shook his head. "It's just speculation right now. We have too little information. Let's wait until we actually go to 2072 with you and observe it firsthand."

"Let's deal with the immediate issues first; these things are too far removed from our lives..."

Char nodded. "Yes, let's deal with those ghosts first."

He slowly exhaled a breath of stale air, sat back down on the sofa, and looked at Einstein. "What do you think would be the most suitable way to deal with this?"

"Hasn't Cindy already given you the answer?"

Char was taken aback, but quickly realized, "Use lightning?"

"To be precise... it's high temperature." Einstein picked up his coffee and took a sip. "Its essence is a Bose-Einstein condensate close to absolute zero, which has the characteristic of ultra-low temperature, which is why it can maintain this state."

So... we'll deal with it using extremely high temperatures. However, this temperature is very high; it requires plasma exceeding 6,000 degrees Celsius.

Einstein channeled his mental energy into the badge, searching through the pages of the configuration patent.

"This type of magic is all at the fourth rank or higher."

"So... there's no way out?" Xia's expression was rather grim.

"No."

Char looked up and watched Einstein fiddling with the pipe in his hand, his eyelids slightly lowered, looking confident of victory.

"We can use the old method."

"The old method?"

Char seemed to remember something and focused his mental energy on his storage space.

There were still hundreds of compressed hydrogen-oxygen spheres lying there quietly, not yet used up.

Although its current power may not be comparable to a true third-tier spell, its advantage lies in its large quantity and lack of mana consumption, making it still very useful for continuous bombardment.

However, he was now thinking about something else: the process of creating the magic in the first place...

Engineering magic.