After verifying the magic imprint, Xia Duo finally entered the library of his heart, although it was underground, but the overall layout of the library was not much different from the academy library on the ground, except that the internal space was a little smaller.

On top of that, you only need to confirm your identity when you enter the door, and once you enter, there are no restrictions on all the books and materials inside.

At least, Xia Duo passed by two or three rows of bookshelves in succession, and found no books he couldn't handle.

At the same time, he also found that most of the books included here are collated materials from various research projects within the institute, and there are relatively few materials outside of specific projects.

However, thanks to the more reasonable way of categorizing books, Xia Duo still easily found a lot of materials related to resurrection spells in the life realm and soul realm.

The situation that he had feared about not being able to find the information did not appear, but most of the information belonged to the sub-technology of the resurrection spell, or the support technology.

For example, human tissue repair, vitality recovery, soul traction, soul summoning, and so on.

And from these materials, Xia Duo also sorted out the restoration and development of the resurrection spell of the remnants of the empire, and yes, the technical repair.

In the past, the resurrection of the object did not necessarily require the resurrection of the subject's body, or a part of the body, but in today's era, resurrection spells do not reach the level of the past, and a certain amount of active body tissue must be preserved.

Blood or flesh can be fine.

Today's researchers have conducted a lot of research, but even though they have excavated the remains of the Resurrection Division, they have not been able to recover the original resurrection technique.

But along the way, a large number of intermediate spells were also invented that were not available in the past, such as more efficient healing techniques and even human cloning.

However, the current era is not without achievements that surpass the past, the most typical of which are soul traction and soul summoning related spells.

……

During the Imperial period, if you want to resurrect a dead person, although you don't need a corpse, you must need a soul, and the soul is quite troublesome to obtain.

Either the soul that disappears quickly is intercepted at the scene of death, or the deceased is carrying a [Soul Talisman] when he dies.

The former, if there is someone on the scene who can intercept the soul, then it is not much difficulty to save the person, there is no need to wait for him to die and then resurrect.

As for the latter, the [Soul Talisman] is essentially a high-quality magic item, and if it is for insurance, it even needs to add a teleportation function.

Even in the heyday of empires, a fine magical item was not readily available to most people.

This was also an important reason why the resurrection technique was not popularized at that time.

Of course, Xia Duo did not rule out a small number of vested interests who artificially set up obstacles to the technological breakthrough of the resurrection spell in order to show their privileges.

But now, there are fewer people and even fewer high-level mages, and the above will only hope that the resurrection spell will develop quickly, not hinder.

Before leaving the survival base, Mercade was collected a vial of blood for the resurrection, and crucially, all high-level mages are now completely free to resurrect for the first time.

This is due to the emergence of spells related to soul summoning and soul traction.

High-level mages who die outside and still have a chance to be resurrected, as long as an insider reports it, the rear base will immediately open the summoning circle, summon their souls, and then resurrect them, the cost is more than one grade lower than in the past.

Of course, if no one reports it, as long as the time exceeds a certain limit, it will never be resurrected.

As for the soul traction, it is generally temporarily arranged when there is a major action, and it does not need to be reported and summoned again, but it comes with a traction effect, and the soul will immediately go back to resurrection as soon as the person dies.

Like Elise said before that she had a mission to go out, Xia Duo was sure that she must have blessed the soul traction effect first, otherwise a senior arcanist, such a valuable human resource, would definitely not be wasted at will.

……

Inside the Graduate School Library.

Xia Duo almost greedily flipped through the information related to the resurrection, but when he looked at it, he realized that there was a problem, and it was a very important one.

In all the materials, there are a lot of soul summoning and soul traction, but there is only a description of the effect, and there is no technical implementation details.

Even the final step of resurrection is there, but the part of how to get the soul is missing.

In addition, Xia Duo also suspected that someone had deliberately hidden it, and that was about the technique of soul healing.

In "Mercard's" memory, Comanso had a number of special means to restrain the resurrection of the remnants of the Empire, such as the [Negative Energy Erosion] he received before.

People who die from negative energy erosion cannot be resurrected, this is because the soul is polluted, then the means of healing the soul are needed, and correspondingly, there will be those on the side of Comanso who will continue to refrain from restraint.

In addition, there may be restraint of soul summoning, or even restraint of soul traction.

From this point of view, the institute hid the relevant technical details, perhaps to prevent Comanso from knowing.

However, on the side of the research institute, once you join, you can't leave the survival base, is it possible that there is still some trick against the heart of the empire?

If there really were such a spy, then Komanso would have already ploughed the court and completely wiped out the remnants of the empire.

But in any case, putting aside some careful thinking of Long Wangshu, Xia Duo's task of entering the projection plane this time can be said to have been completed!

……

The so-called resurrection spell, the real technical key point is probably three parts-

One is how to heal the body and stay active;

One is, how to collect souls and keep them intact;

The above two points, the main plane's Nessreel can almost do it, it is nothing more than a question of how high the degree of completion is, which has solved the problem from 0 to 1, and then from 1 to 100, which is not too difficult in nature.

The last one is the most difficult to solve, and that is if the soul is put back into the body and can still return to normal.

In general, when the soul leaves the body, the connection with the body is broken, and in this case, even if the soul is stuffed back in, the dead will not be resurrected.

It's similar to taking out the heart and putting it back in, breaking the original normal state of the human body, and even if you put it back, it will still be a corpse.

How to reconstruct the connection between the soul and the body is the absolute key to resurrection spells!

Xia Duo had previously entered the [Projection Plane: Arcane Empire], but at that time, he did not know the history of the development of resurrection spells.

But now, he knows that the original study of resurrection spells was to make the living enter a dying state again and again in various ways, summing up the law of the connection between the soul and the body, and reversing this process is resurrection.

The more perfectly the soul is reconstructed with the body, the fewer after-effects there will be after resurrection.