As for the little fan who was looking around, Xia Duo simply called him to join him. Since there was one more Belera, he didn't care about one more.
Although the so-called joint action refers to the joint action of Gilles Tower and Gustav Tower, for each specific participant, it is actually a joint action.
Since Vincent already had the tendency to actively approach him, it would be too unkind to refuse him directly.
In comparison, if Vincent is a mid-level mage mixed in among three high-level mage, the risk may be higher.
The only thing that worries now is whether Vincent can understand the impact of plane differences on spell casting. Not only Sha Duo thinks so, Niya and Belera also cast doubtful glances like Vincent:
"You know how?"
Being targeted by three high-level mages, Vincent quickly replied: "I know! My father already taught me before I came here! Really! I promise!"
"Then let's start verifying the spells in the spell book! As many as you can verify!" Xia Duo directly set the task.
The spell book I just received from the quartermaster is a magic item. Although it is not as sophisticated as Xia Duo's spell book, it is not that easy for ordinary mages to obtain.
However, considering that the participants in this mission are either pioneers or direct members of the Seven Towers, and their wealth is naturally different from that of ordinary mages, this spell book is actually just like that, but -
The real purpose of this spellbook is not just a semi-consumable item like a rechargeable scroll, but is related to joint spellcasting.
As soon as he received the equipment and supplies, Xia Duo checked them all, especially the spell book, which was almost unnecessary.
After taking a closer look, and comparing it with what Niya had obtained, Xia Duo made an astonishing discovery——
That is, these spell books may have had some co-frequency function set at the beginning of their manufacture, making them almost natural joint spellcasting props.
Joint spellcasting, also commonly known as synergistic resonance spellcasting, is how many instructors exploit their apprentices' spellcasting energy.
But the reason why it is called collaborative resonance is because different casters are essentially different subjects. Under normal circumstances, there is no way to jointly cast spells. Only by resonating their wills to the same state, or frequency band, can they jointly cast spells.
For casters like elves, who have learned the magic network, tempered their will, and reached a certain resonance state to cast spells, joint casting is almost effortless.
But for casters like humans who directly force the magic network, the personal characteristics of the will are extremely important. Relatively speaking, it is more difficult to achieve a state of resonance among different casters.
But just as the capital is working hard to figure out ways to make money, the mentor will also be thinking about ways to exploit his apprentices.
Synergistic resonance spellcasting is almost the first course that every apprentice learns after choosing a mentor!
But that was in a laboratory situation, the result of the mentor exploiting the apprentice to the extreme, regardless of the status of the apprentice, and there were usually only one or two apprentices.
During wartime, the situation is different. It is necessary to coordinate the mental state of everyone in the resonance state. Although there are leaders and collaborators among the casters, there is almost no over-exploitation, and there are also more people.
It is also more difficult.
Xia Duo did not jointly cast spells with others in the battle. At most, he and Niya tried to jointly cast spells in the laboratory to save energy, but they did not always have a tacit understanding.
This is true for both husband and wife, not to mention when there are many people and they have to fight!
Fighting is no different than other battles. If you make a slight mistake, you won't lose any money, but you may lose your life.
Before, Shado had always been curious about whether the Giles Tower convened so many people to conduct joint spell-casting training. Would it be more of a gimmick than reality?
Now it seems that he still has too little knowledge and does not understand the background of the Seven Pagodas.
In addition, the spells in the spell book should have been summarized through long-term practice, and are roughly divided into four types: protection, spell breaking, movement, and restraint.
There are almost no lethal spells!
Perhaps this is why everyone is given a fireball wand.
…
When he thought that there might be some kind of technology hidden in the spell book that could allow the caster to resonate efficiently, Sha Duo felt like a cat scratching his head. He was thinking about this issue even in the process of testing the difference in spell casting in the green field plane.
Several times, I almost made a mistake.
It's not surprising that Xia Duo was excited. In fact, joint spell casting meant the possibility of the existence of the mage army, as well as the possibility of the existence of war spells.
In fact, Shado already knew about the existence of the mage army in the projection plane [Mayelita Sukanwisa City].
At that time, he transformed into an elf named Athos. Athos's deceased parents' friend was also the father of Athos's friend Grada, who was the chief officer of the mage group in Sukanvisa City.
But that was the elven kingdom in the projection plane, and Netheril in the main plane did not have a similar army of pure spellcasters.
Even the Daxia Spell Breaker troops in Xia Duo's imagination were assisted by magic and used swords to kill enemies, rather than being purely spellcasting troops.
In addition to the precious talents of spell casters, high status and difficult to waste, it is also an important reason why large-scale joint casting is difficult to achieve.
Even among the elven kingdoms on the main plane, Xia Duo has not heard of anyone who still retains an organized mage army.
Now that he saw the joint casting auxiliary spell book that Netheril had taken out, Shado guessed that it was either specifically used to lighten up his muscles, or it was already known to the elves.
Otherwise, it is obviously more in line with Netheril's strategic expectations to accumulate more and gain more.
Of course, it was difficult for Xia Duo to guess what the big shots above were thinking, but he knew that the northern countries were probably about to stage an unprecedented arms race.
So what can he gain from this arms race?
For a time, concepts such as mobility, population, spellcasters, and unrestricted warfare popped into his mind one after another, and they were all mixed up. Before he knew it, Sha Duo had stopped the inspection work he was doing.
At this moment, Niya quietly leaned over and asked softly: "What's wrong?"
Xia Duo glanced at Belera and Vincent, who were still seriously casting spells to test the differences between spells in different planes, and shook his head slightly, "Nothing, let's continue testing!"
The two had been together for so long, and even the most intimate relationship had occurred. Niya still knew Xia Duo relatively well, and knew that the situation was not right, so she did not continue to ask.
…
Not long after, Belera was the first to speak out, "I have finished the test. Except for the slightly stronger positive energy in the Green Field Plane, the properties of other elements are roughly the same as the main plane."
This is a typical Arcanist simple conclusion.
Sha Duo and Niya understood as soon as they heard it. It was consistent with their test results. Although it was only a side test, it could also reflect the relatively real side of this plane.
It can be said that this secondary plane named Green Field Plane is more livable than the main plane!