It was supposed to be a Mythic card set, but what the heck is this Warhammer 40k?

The lecture lasted for two hours, and Lu Ya was drowsy throughout it.

Finally, as it approached 3:30 p.m., the lecture came to an end.

Lu Ya walked out of the classroom, yawning.

At the same time, Ruan Shiying also walked out of the classroom looking listless.

Seeing Ruan Shining's listless state, Lu Ya said, "Let's go, I'll treat you to milk tea."

Upon hearing Lu Ya's words, Ruan Shi Ning's eyes lit up. She looked at Lu Ya with a half-smile and said, "Is this how you repay me? At least you still have some conscience, hehe!"

It's clear that Ruan Shiying has absolutely no resistance to desserts and milk tea.

Perhaps it will come in handy when it comes to bribery in the future.

Lu Ya shrugged as he thought about it and replied, "Whatever you think."

Ruan Shining couldn't wait either: "Let's go then, I'll get a super large one later."

After leaving the teaching building, the two walked towards the milk tea shop on the street.

Ruan Shiying ordered a super-sized matcha, while Lu Ya ordered the cheapest lemon tea, which cost a total of twenty-two yuan.

After paying and receiving his milk tea, Lu Ya handed the matcha cup to Ruan Shiying. Then, while sipping his lemon tea, he asked, "By the way, what should we call that teacher later?"

Since this involves helping someone else, it's essential to understand their situation thoroughly.

After taking a sip of her milk tea, Ruan Shining replied, "This teacher's name is Tang Xing, and he is an old professor at our school."

"Because I'm getting older, there are some things that are inconvenient for me to handle, so I need the students' help."

Lu Ya nodded thoughtfully: "Then how did you come to know this Professor Tang?"

Without hesitation, Ruan Shining replied, "It's very simple. I took Professor Tang's course and would help him out whenever I had time, so we got to know each other over time."

After hearing Ruan Shiying's words, Lu Ya looked enlightened.

Led by Ruan Shiying, the two passed through the school's teaching buildings and dormitories and arrived at a secluded corner of the school.

Soon, their steps were blocked by a large iron gate, on which a warning sign was hanging.

"Experimental area, do not approach!"

Ruan Shining pointed ahead and said, "This is it."

Lu Ya glanced around at his surroundings and asked in confusion, "This doesn't seem like a place for cultivating materials."

After all, the surrounding area was dilapidated and looked like a wasteland.

Ruan Shining didn't explain directly, but said with a smile, "Come with me, you'll find out in a moment."

As she spoke, Ruan Shiying took out a bunch of keys from her pocket, then opened the iron gate and went inside.

Lu Ya didn't think much of it. He quickly followed Ruan Shi Ning's footsteps and stepped through the iron gate.

However, as soon as he stepped inside, Lu Ya quickly sensed that something was wrong.

It was a clear, sunny day outside, but the moment he stepped through the iron gate, the sunlight vanished without a trace, leaving only darkness.

At the same time, the surrounding environment also changed. The once modern university campus disappeared and was replaced by a gloomy cemetery.

This sudden change surprised Lu Ya, as if he had just entered a secret realm from the real world.

But Lu Ya quickly realized what was happening and asked in surprise, "This is... a domain card?"

Although he knew that Domain Cards existed, this was the first time he had ever actually come into contact with them.

At that moment, Ruan Shiying, who was walking ahead, turned around and playfully stuck out her tongue at Lu Ya, saying, "How was it? Were you scared?"

Lu Ya sighed with emotion, "I've really learned something new this time."

He never expected that this place, which looked dilapidated from the outside, would turn out to be a hidden paradise inside.

Ruan Shi Ning continued, "As you know, because the materials can only be produced in an environment like a secret realm, we have to use a domain card to simulate the environment of the secret realm."

Listening to Ruan Shi Ning's explanation, Lu Ya couldn't help but marvel.

In fact, Lu Ya didn't know much about the Domain Card. It is said that after the Domain Card is used, it will form an independent space that is separated from the outside world.

Simply put, it's like the "world of its own" in some fantasy novels.

Of course, the function of Domain Cards is not limited to material cultivation. The most important function of Domain Cards is to enhance the combat power of cards.

For example, you can create a combat environment that is favorable to your own cards, thereby increasing their combat power.

Or, to put it another way, create an extremely harsh environment and use that environment to weaken the opponent's cards' combat power.

These all fall under the scope of the domain card's function.

This led Lu Ya to have a bold idea.

If we can use the Domain Card to set up an Imperial Cathedral, wouldn't the combat power of the Astartes and the Astral Army increase dramatically?

Unfortunately, Lu Ya could only dream about these things.

After all, the cost of creating a single Domain Card is astronomical!

With the limited funds Lu Ya currently has, it's estimated that it won't even cover a fraction of the materials needed to collect them.

Creating domain cards is wishful thinking.

After a brief sigh, Lu Ya reluctantly turned his gaze away, then looked at Ruan Shiying and asked, "But speaking of which, what kind of monster did Professor Tang cultivate?"

Ruan Shining patiently replied, "Professor Tang is cultivating undead-type monsters this time."

Upon hearing about the strange creatures Professor Tang had cultivated, Lu Ya was immediately taken aback.

It's worth noting that this type of material is not commonly found in China; it's basically only found in secret realms overseas.

The reason is quite simple.

Although countless secret realms were born all over the world after the abyss appeared and merged with this world.

In reality, these secret realms are all different; each one is like an independent little world with its own unique characteristics.

To give a simple example, the Peach Blossom Village Secret Realm in Lingjiang City is a rare and eerie secret realm, and the monsters that emerge from it are mostly bizarre.

The neighboring city of Jinling is completely different. Jinling City's secret realm is a demon realm, where a large number of terrifying demons lurk.

However, this is only the tip of the iceberg when it comes to the number of secret realms. In addition to these two types of secret realms, there are also evil spirit secret realms, underworld secret realms, Cthulhu secret realms, and so on.

Furthermore, since the fusion between the Abyss and this world is still ongoing, new secret realms will be born every once in a while!

Because the secret realms in each region are different, card makers in each region have their own unique card-making styles.

Card makers in places like Lingjiang City tend to create cards that are rather eerie.

This can be seen from the "paper figures carrying a sedan chair" that Yang Feng gave him.