In just a few seconds, the special steel plate tens of centimeters thick turned into an orange-red liquid, flowing down like magma gushing out of a crater, burning the beautiful marble floor beyond recognition.

For a moment, white smoke obscured the eyes, the murmur of the floor was incessant, and a thick metallic smell filled the air. Pache frowned, covered her mouth and nose with her sleeves, lifted her legs, and stepped over the threshold that had not yet fully melted, through the steaming, molten iron hole in the locked metal door.

"Beware of burns. She said to the little devil behind her without looking back.

"Yes, thank you for your concern. ”

The little devil nodded, and followed.

As soon as they passed through the door, a smell of old books rushed to their faces, and the pungent smell of iron that the two of them had brought in from outside washed away. The secret room in front of him had neither a window nor any light source, but it was pitch black with no fingers visible. The temperature here is several degrees lower than outside, and considering that the entire building has long been out of power, this room must have adopted some kind of cooling structure, or material.

For a moment, Patchouli thought of her underground library. Such a cool and dry environment is indeed the best place to store books.

"Glimmer!"

A small ball of pure white light, at Pache Li's call, condensed in the palm of her hand. Although this ball of light was small, the light emitted could light up a range of several meters, enough to open up the way for the two of them. What's more, it has neither temperature nor physical body, and only provides light, and is unlikely to trigger any traps or other unexpected hazards.

To use an analogy, methane. All in all, in such a secret room, it is better to be cautious.

Holding the ball of light in their hands, the master and servant walked all the way, passing through row after row of tall wooden cabinets that led straight to the roof. Those cabinets, without exception, all of them, were bookcases.

As Patchouli had expected, this was a library of books, and although its collection was inferior in quantity to the large underground library of the Red Devil Pavilion, it was likely to be superior in quality. There are no things in this room that are indiscriminate, they are all "really good books". With just a glance, there are many rare ancient books that Pachou has never seen or heard of, but has not had the opportunity to get their hands on. Not only that, but even the "Original Magic Codex" that absorbed the author's soul and the "Demon Codex" written in the words of the devil from the other world can be found in this library.

At this point, Pache can look forward to a little more great writings and knowledge.

"Looks like this is the right time. She thought to herself.

Excitement is excitement, if only there were books, Patchouli would still be a little disappointed. It's not that these books don't satisfy her, in fact, she doubts that she can't fully comprehend the knowledge in those books. Some of these things are still too advanced for mortals.

However, in this world, knowledge alone is not enough. It is one thing to know more, and it is another thing to be able to make use of what you know. Some time ago, Pachouli investigated the ruins of Nalan Twilight, Hakurei Reimu, Shomeimaruwen, and the place where Radu III fought, which is Hakurei Shrine. From the remnants of magic and the various crystal fragments, Pache learned one thing:

Radu III is a very good magician, and her magic skills are far superior to her.

Admittedly, if you only look at the reserves of magic or the understanding of magic, that guy can't compare to the "immovable library", Pache Norregi. But in terms of "transforming existing knowledge into combat effectiveness", that is, actual combat technology, Patchouli is far inferior to him. If the two were to fight, to be honest, Patchouli would not be confident of winning.

It's like a seasoned warrior with a long sword in hand facing an enraged boar. In terms of strength, it is clear that the wild boar is superior, but anyone with a discerning eye can see that the warrior will easily win - this is the gap brought about by skills and tactics.

Compared to Pache Lichua's magic, Radu III's magic is smaller in scale and power, but it is unusually fast to cast, and the force is concentrated, which is both precise and deadly. The simplicity of the magic circle, and the technique of storing magic in crystals, was something that Pache had never touched. Locked up in the library, painstakingly studying and working behind closed doors for hundreds of years, and finally seeing a new combat magic from the outside world, Pache couldn't help but wonder if she was behind the times.

As with science and technology, magic has evolved and advanced over the past 100 years. Countless magicians were born and died, countless new theories and techniques appeared and gradually improved, and countless new inventions appeared, some of which quickly became obsolete, and some of which were constantly improved and endured...... However, all this has nothing to do with the self-enclosed Pache Noregi.

Because of this, Patchouli must take this opportunity to get a good understanding of the level of magic in the outside world.

Soon, the two of them came to the end of this secret room, and what was displayed in front of them did not disappoint Patchouli in the end.

It was a long table, with a large pile of strange instruments, and materials such as gems, powders, dust, and insect carapaces. On the messy table, there was even an unfinished report and a pen that hadn't had time to snap the cap.

"This is where Radu III conducted his magical experiments......"

Pache said, stepped forward, picked up the half-written test report from the table, gently wiped the dust off the paper, and glanced at it. It was an article about "blood and magic transmission", and although it was not yet finished, it was enough to surprise Pache with his head.

Fold the paper and put it away, and Patchouli looked up again, and saw that on the wall in front of her, from left to right, there was a wall full of closets. The closets were covered with clear glass doors, and the contents were unreservedly revealed.

The small compartments in the wall cabinet are all hexagonal, closely arranged like a beehive. The height of this wall is nine meters, the width is more than thirty meters, and the length and width of those hexagonal cubicles are only one or twenty centimeters.

Of course, the point is not how dense those cubicles are and how many goosebumps can give a person with a phobia of condensity. What really made Pache look up and couldn't bear to blink was not the unusual structure of the cabinet wall, but the objects placed in it.

It was crystal, a pure crystal that had not yet been stained with magical color, a near-perfect magic vessel. They are surrounded by sponges and bright red satin, fixed in a wooden frame. On this wall, in every hexagonal compartment, there is one such crystal, without exception.

"Little ...... Little Devil ......"

Pache was still staring at the wall, her voice trembling with excitement.

"Help me pack up all these crystals, and in addition, the things on this table, and all the books in this room, all of them must be packed up, sorted out, and brought back to the Red Devil Pavilion. ”

"Yes, Master Pache will do as you tell you!"