"The Secret of Cutting-edge Black Magic" did not surprise Zhang Jin, and it recorded some high-end and evil black magic.

In Zhang Jin's view, every kind of black magic is a way to attack the soul, and some are also a way to use the soul.

For example, the unforgivable spell.

The heart drill spell is to make the other party feel the pain of the whole body when casting, and this pain cannot be tolerated, because it is directly on the soul, there will be no scars on the body, and if it is serious, it will make people crazy and even die.

The principle of explaining it through the soul is very simple, that is, when it is cast, it makes one's soul form various instruments to torture the other party, acting on the other party's soul, and the soul will naturally feel pain and unbearable when attacked, and the soul's ability to withstand it is limited, and if it exceeds this limit, it will collapse and die.

The same is true of the Avada Death Curse, a spell that directly attacks the soul, which can scatter the opponent's soul with a single blow, without leaving the slightest scar on the body.

Moreover, its attack method is also direct soul power, using a part of its own soul to form a weapon to attack the opponent, so this attack cannot be resisted by other spells.

The spell itself is a transformed application of soul power, and it is powerless against pure soul attacks, so it cannot be resisted by the spell.

And because spells require a part of one's own soul, only adult wizards with strong magic and strong souls can successfully cast them.

At the same time, if you want to separate the soul, you need to have a strong will to guide, that is, a firm determination to kill the other party, and the soul that attacks is often affected by the outside world and the object of the attack, and it becomes difficult to merge with the original soul, that is, the soul is polluted and split.

And if this part of the soul is collected at the end of the attack, it can be made into a Horcrux, which is how Voldemort made a Horcrux.

Similarly, the stronger the enemy attacked by the Avada Curse, the stronger the soul power required, the greater the damage to oneself, and the less backlash the caster will receive if the enemy is weak or actively killed.

As Dumbledore said, using the Avadaso Curse is a fall of the soul and will make the wizard's soul unable to be saved.

The Imperius Curse is much simpler, it is to inject one's own will into the other party's body, and the other party fully executes all his orders.

However, the Imperius Curse is also the easiest to resist, which depends entirely on the strength of the individual's will, such as Harry Potter can completely resist the Imperius Curse when he is in the fourth grade.

And there are many curses in this book, and the principle is simpler than imagined.

It is the way to hide a spell in a certain way from other objects or a certain place, depending on the power of the hidden spell.

Simple ones such as Bibi Duowei beans are actually curses, but the hidden spell can only make people feel different flavors.

There are also all kinds of joke goods, which are all hidden with some small magic spells, all of which are prank charms, so it doesn't hurt.

And the more difficult the spell is, the harder it is to hide, and the more powerful it is to complete it.

In addition, there are some weird-looking curses, which often require some tissues on the target's body, such as hair, nails, etc., to complete the target's lock-on.

Interestingly, it's similar to Voldemort's curse on the position of Defence Against the Dark Arts professor, he needs a stronger ability to lock onto targets, and if I'm not mistaken, Voldemort must have borrowed the power of Hogwarts Castle to do this.

This is similar to how the target is calibrated on the Living Point Map, and can only be done with the help of the Castle.

The last big catch is to find the source of the Dark Mark.

This dark magic was first used to mark magical creatures, and was earlier called the Slave Mark.

That is, to mark magical creatures that are captured or raised to ensure that they do not betray.

The way to do this is to mark a very small part of your soul into the soul of the other person.

The depth of the mark depends on the amount of soul power injected, and too much soul power injected will also have an effect on itself.

This part of the soul cannot be resurrected, because it is itself in another soul, and when the owner dies, it will be canceled out and obliterated.

When the soul is injected more, it can also have more functions, such as some simple communication with the person receiving the mark or magical creature, and even feel the emotions of the other party to prevent betrayal.

In this way, the soul power infused by the Dark Mark should be extremely small, or even just enough to maintain the existence of the mark.

Therefore, if you want to perceive each other, you must actively inject magic to activate it.

It is also because of this that Voldemort was able to create so many Dark Mark marks, you know, there are only five or six records in this book, and Voldemort may have made more than thirty, and the Death Eaters who are basically more important are one per person.

Knowing the principle and method of marking, it is not easy to remove it, and the first problem is how to find the location of the marker.

This doesn't mean that the mark on the arm is on the arm, even if you cut off the whole arm, it doesn't work, the mark will still be there and will be transferred to other positions.

It is marked on the soul, and if you have to find a place on the soul, and then eliminate it, otherwise you will kill your own soul and you will commit suicide.

No one would do anything to their soul at will, especially if it was such a big operation, or blind exercise.

Moreover, almost no one can perceive the soul in the body, although wizards generally believe that there are souls, but this can only be confirmed if they become ghosts.

And this method of action is very useful for Zhang Jin, although now Zhang Jin can't detect the details of the soul changes, and can't perceive the position of the black magic mark.

But Zhang Jin and Severus's current soul states are mixed together, and they are not completely fused into one, there is still a little difference.

So Zhang Jin was able to perceive Severus's soul.

And Zhang Jin is not trying to eliminate the black magic mark, this mark contains a trace of Voldemort's soul will, maybe in the later stage, when Zhang Jin's strength becomes stronger, it can be used.

For now, all you have to do is find a way to cover it up.

The method used by Zhang Jin is to re-mark it through his own soul will, and also use the method of marking, which is equivalent to covering the black magic mark with another layer of soul power, which plays the role of covering.

And because they are all their own souls, the operation is surprisingly simple, of course, it may also be equivalent to covering Zhang Jinde's soul on Severus's soul, and the two sides are about to merge, so it is relatively simple to cover.

This is also something that Zhang Jin didn't expect, if it were someone else, it would be almost impossible just to change the state of the soul, let alone cover it.

When your soul is water, you say cover it!