As the night darkens, the training ground is thinning out.

The green-robed old man, who had always sat lazily at the table, stepped up the stairs with an extremely rare appearance at this time, and came to a room near the top.

That's the training room that Rheinfel rented!

The time was coming to an end, and the more the green-robed old man thought about it, the more he felt that something was wrong, and he came to the door quietly, his eyes narrowed slightly, wanting to hear the movement.

With his wind magic skills, even at the bottom, it is not difficult to hear the movement here.

The problem is, there's hardly any movement here!

Quiet and bizarre!

The mechanisms in the training room will activate on their own, and unless the person who enters them has a strength far beyond the level of the training room, it is difficult to completely suppress those mechanisms.

But wouldn't it be extremely unreasonable for someone with such ability to rent a training room?

The green-robed old man thought about this, picked up the spare pass, and prepared to open the door to the training room.

At this moment, the door of the training room suddenly opened on its own.

The green-robed old man was stunned, and the first thing he saw was Rheinfel's face with a slight smile.

"Senior, are you so worried about me?" said Reinfel, laughing.

The green-robed old man closed his eyelids and swept towards the training room, finding that there was nothing abnormal inside, and even normal and a little weird.

"You're not training at all, are you?" asked the green-robed old man in a deep voice.

"It's not important, is it?" Rheinfel laughed, "Wouldn't it be good if we didn't break the training ground?"

The green-robed old man has been here for so many years, and the quality of the equipment is naturally clear at a glance, and he also knows that Rheinfel is deliberately ridiculing.

He was silent for a long time before he said, "You people...... What exactly do you want to do? Don't you think Longshou City is chaotic enough?"

Rheinfel tilted his head slightly, "The old-timers seem to have a deep affection for the Dragon Song Kingdom. ”

The green-robed old man snorted lightly, not saying right or wrong.

"I don't plan to do anything unfavorable to Dragon Head City, but ......" Rheinfel said lightly: "There are too many people who secretly want to do anything to Dragon Head City, do you think you can stop it?"

The corner of the green-robed old man's eyes twitched, but he heard Rheinfel say again: "The turbulent undercurrent is irreversible, only a gap is missing, the seniors are obviously very aware of this, what is the point of being aggressive to me?"

"If you want to attack Longshou City, you should weigh yourself. The green-robed old man said in a deep voice: "Although the national strength of the Dragon Song Kingdom has long since ceased to be at its peak, not everyone can intervene in it. What's more, there is also the empire behind the protection. ”

Hearing this, Rheinfel raised his eyebrows lightly and said with a smile: "Maybe...... Is it precisely the one who is protected?"

The old man in the green robe didn't understand his vague words, and his eyes were full of doubts.

"I still have to meet someone very important, so I'll take my leave. Rheinfel had no intention of saying more, said a polite goodbye, and walked away.

The green-robed old man watched his tall and dashing back disappear at the door of the training ground before entering the training room.

All the equipment is in good condition, not even a trace has been left, as if no one has ever been here, neat and bizarre.

No one knew that in the recording room dozens of meters away, an extra crystal was quietly placed on the table.

In front of the crystal, there was also a small note.

*

On the sixth floor of the library attic, after eating and drinking, everyone sat around, either concentrating or boredly flipping through the magic book.

The only thing that is consistent is quiet.

Because they were afraid of disturbing the star trails of the three magic books at the forefront.

Based on the 'Book of Oblivion', deciphering the three magic books of Thunder, Aria and Zhenyue at the same time requires extreme concentration to understand and explore, even if you don't need to spend your own magic power.

And the reason why Star Rail did this was because Arya's sword made him feel the characteristics of three-dimensional fusion before.

Shake!

The power of that sword's three-element fusion is completely based on vibration!

If the vibration of the Thunder Magic is a sharp blade, then the vibration of the Earth Magic is a thick and condensed hammer, and the Wind Magic is a sharp and delicate spike, the three are integrated, but each performs its own duties and plays a different effect.

That sword made Star Rail feel an unprecedented shock.

Elemental fusion, can actually coordinate the vibration so perfectly without affecting each other, with his current ability, let alone the three-dimensional vibration fusion, even if it is two-elemental, it can't be done.

At best, he could only refine each of the three forms and become proficient in them, after all, he didn't really use them, and he wasn't sure what kind of feedback problems he would have when using them.

And based on what the three have in common, Star Rail has also found the eyebrows of the black pass card problem: these three magic books must all have content about elemental shocks!

After a few hours of purposeful searching, Star Rail finally found the details about concussion in the other two magic books, which do not occupy a key position in the Book of Thunder like the Thunder Frequency Sword Technique, but are only some minor applications, and the details are not so detailed.

But that's enough for the Star Track, the three books mirror each other, and when compared to the missing loop in the passcard, Star Track is almost entirely certain that the missing loop is based on the details of each of the three books.

But Star Rail didn't understand why his teacher had chosen such a design, just to let the latecomers see the mystery of elemental oscillations, but what did it have to do with the things on the seventh floor of the library attic?

Although he had a lot of confusion, he didn't have time to think about it, and after having a rough outline in his heart, he put down the magic guide book, took out the magic guide burning device, and began to repair the pass card.

Yi Lushi, who was bored and bored, had been paying attention to the movement of the star track, and immediately came over when she saw him like this, "Have you found something?"

"Pretty much sure. Star Trail nodded, and the voice made everyone's eyes come into focus.

Star Rail glanced at everyone and smiled faintly, "Tonight, you should be able to get in!"

Outside the window, dark clouds obscured the stars and the moon, and the sky was dark.

Longshou City is brightly lit, like the starlight on the ground, shining brightly.

The brightest is naturally where the palace is located.

After the false alarm in the afternoon, the Dragon Song Palace deployed a large number of guards, and at this time it was densely surrounding the palace, and the water was impassable.

But for all the heavily guarded, to some, it was like nothing.

For example, Rheinfel.

After leaving the training hall, he quietly sneaked back into the woods outside the palace, standing on the top of the highest tree, looking at the farthest dormitory.

Although his figure should stand out in the light, when the light touches him, it bends away like flowing water meets a rock, and there is no reflection in the slightest.

There was a flash of thunder in the air, and the purple light was dazzling.

Before the thunder sounded, his figure suddenly disappeared in place.

*

Monday's second shift.

(End of chapter)