"It's a little sudden, but you're actually the legendary Demon King. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ」

The cause of the incident was Roo's cleaning of his utility room a few hours ago.

It was a utility room that he hadn't been in since he was born, and his only relative, his grandfather, had forbidden him to enter it since he was a child, and when he was a child, he sneaked in out of curiosity, only to be beaten half to death by the old man with a clothespole.

Some time ago, his grandfather left in his sleep because of his advanced age, and after a funeral for the old man with his few savings, not long after graduation, Luo Ao, who was still on probation, basically had no money on hand.

With the idea that 'maybe there will be something valuable in the utility room, anyway, we will pay the salary first', so he took advantage of the fact that he still had half a day off and cleaned the utility room.

As a result, I found a big hardcover book with a hard cover that looked like a Western magic guide book.

Before he could open it to confirm its contents, the book suddenly jumped to its own feet and said the above sentence.

"How so...... It's really old-fashioned......"

Bombarded with online novels, Roo was only initially surprised and quickly calmed down.

"Demon King City has been completely destroyed, and you must collect enough fantasy materials to be able to rebuild it."

"Can I choose not to do this?"

"The time-hopping has been activated, and if you insist on stopping, there is a 99.98% chance that you will fall into the space-time gap."

It was only then that Luo suddenly noticed that something seemed to be wrong around him, and the darkness around him was slowly flowing like a liquid...... I didn't find out for the first time that the utility room was too dark, and there was no fault for the electric light!

"Okay," Roo sorted out his mood, "Can you explain a little bit what 'fantasy material' is?" ”

"Outside of this world, there are countless other worlds, many of which are fantasy worlds derived from human impressions, and all you have to do is enter those worlds and find the 'world core' in them."

"It's so high-end, can you explain it in a language that humans can understand?" Xu Shenxing scratched his head, feeling that there were too many proper nouns in it, so he tried to ask.

"I've worked tirelessly as the Demon Kings to gather information about the world and manifest it as a spell for you to use. The so-called 'world core' is actually something similar, and it is difficult for me to explain it to you with your comprehension, so it is more intuitive to go through the process directly."

"You just vaguely despised my intelligence, didn't you?"

"Your delusion."

“……”

"Anyway, before you reach the first world, I'll transfer the basic operations and spell usage to your brain, so that even if your brain is not much larger than an ape, you'll be able to understand exactly what to do."

"This time it's already blatant contempt, hey!"

――Dividing Line――

By the time the darkness had faded and the blinding sunlight had flooded the entire field of vision, it took a few minutes for Roo to get used to the brightness.

He seemed to be on a lawn now, surrounded by a number of boar-looking creatures, but with their heads hovering...... A health bar?

"This style of art looks a bit like a Japanese MMORPG game......"

The cold and dry air sent a shiver down the spine of Roo, and then his gaze was taken away from the massive tower-like structure in the distance.

It was impossible to exist in reality, as if it were connected to a huge tower like the sky.

"A new spell, the First Enemy, Manic Boar, has been sent to your spell book."

"A new spell, the Game of Death, has been sent to your spell book."

The same system prompt as the online game jumped into Roao's field of vision.

He hesitated for a moment, then silently recited the spell book in his mind following the basic instructions that the strange magic book had instilled in him earlier.

The big black hardcover book that brought him into this world appeared in front of him out of thin air, and it automatically opened, revealing the latest and original 'spell' he had obtained inside.

Although they are called spells, they are actually cards like Magic and Yu-Gi-Oh, and thanks to its blessings and the previous indoctrination of how to use them, Roo can understand how to use them.

For example-

【The First Enemy: Manic Boar】

【Star Rating:☆】

[Type: Creature-Beast]

[Root: Sword Art Online]

[Summon/Sustain Condition: You can summon the Manic Boar for 2 points of any mana, after which the creature will need to pay an additional 1 point of any mana for every 3 minutes of existence, otherwise it will be sent to the cooldown pool.] 】

[Effect: This creature has no duplicate name restrictions.] 】

[Battle Energy Level: 12/Health: 10]

[Notes: 'You know, before I became that strong, the biggest loss I ever suffered was the damn boar's nose.' - A player's statement]

This is the most basic creature spell that can be summoned for only mana.

Luo Ao's magic power comes from the mysterious organ called the 'Demon King's Heart' in that book, which is said to be like a perpetual motion machine that can continuously produce magic power, but although Luo is currently able to draw 1 point of magic from that organ every minute, the magic pool in his body can only hold a maximum of 5 general magic power, and if you want to expand the magic pool or even divide the magic pool of other attributes, you need Luo to upgrade it slowly.

Even so, it is not a problem to keep the manic boar alive all the time.

Summoning the "Raging Boar" costs 2 mana, and then only needs to pay 1 mana every 3 minutes, and his mana recovery rate is 1 per minute, which is fine.

So he summoned the creature.

The "Manic Boar" is similar to its counterparts on this lawn, with a very unscientific blue color, a rather large body, and its iconic pig nose constantly stirring, as if sniffing out some delicacies around it.

Luo tried to stroke it, and found that it felt like thick brown paper, and the "Manic Boar" was very docile, not at all as violent as the name suggests.

"Sword Art Online......" According to the magic book, the root of the card is the name of this world, but Luo has not heard of this game or anime, and thinks it should be a work from another world.

No matter what kind of game, as long as there is a setting like a blood bar, in short, fighting monsters and upgrading are almost inevitable.

Even if you seem to be a little different from the painting style of this world, you shouldn't be able to jump out of this circle.

So Luo Ao pointed to a kind of "manic boar" next to him, and gave an order to his first subordinate with full energy: "Autumn name boar god, kill him for me!" ”