Animagus is a magical and dangerous magical art in which wizards gradually transform themselves into an animal in extremely complex ways.

Unlike Malicious Transfiguration, the essence of a wizard's soul has not changed, which is equivalent to forcibly stuffing a wizard's soul into the body of an animal.

The Animagus not only changes the form of the wizard, but also the essence of the soul will continue to change in the process of transformation, and the soul of the wizard will gradually become the soul of the animal formed by the Animagus, and the wizard will only ensure that his soul is not assimilated by the animals through the Animagus.

Of course, that means when everything goes well.

Historically, there have been many wizards who have gone mad because they secretly tried the transformation of Animagus, and most of them lost their sanity as human beings in the process of transforming humans and animals, and eventually became animals that transformed themselves forever.

Unlike the Malevolent Transfiguration Charm, the dangerous transfiguration caused by the practice of Animagus has always been difficult to remove, because the sorcerer who has turned into an animal already thinks of himself as such an animal in his heart.

His soul has completely become the soul of an animal, but it is slightly more powerful than that of an animal, and whether he can recover and change back to human form in such a situation depends entirely on the meaning of Merlin or Lady Luck.

Magic has always been wonderful and dangerous, and most of those who only see the wonder without noticing the hidden dangers die on the way out on the expedition.

Of course, William, who was immersed in the transformation of Animagus, naturally couldn't think of this, and he couldn't feel the changes in the outside world, and now William was immersed in another state.

William could feel that his body was shrinking rapidly, and at the same time, a strong itching sensation came from all parts of his body, constantly hitting William's brain, as if something was growing out of his body.

It should be scales, William thought silently in his heart, at this time he can still have a trace of reason, and he can still think about problems.

As the practice continued, William's body already had some images of the transformed animals, such as some tiny red scales on his body, which could basically be seen as a sign of Animagus' imminent success in cultivation.

Contrary to William's assumptions, his image of the Animagus may not be as a flying bird as he had hoped.

After all, William really couldn't figure out which kind of bird had scales on its body.

Could it be a lizard, or a chameleon?

As the metamorphosis progressed, William's own consciousness also continued to weaken, and he began to feel an intense, frenzied murmur, constantly resounding from the depths of his soul, which was an unconscious survival instinct of animals.

This is the most crucial step in the successful practice of Animagus, and only if the sorcerer's soul defeats the animal instincts, can the sorcerer turn back into a human after becoming an animal.

"Hold on, William." Looking at William, who was no longer human, Professor McGonagall clenched his fists nervously, and now he should have reached the most critical stage.

Thinking of this, Professor McGonagall stared intently at William, her wand clenched in her hand, and she would definitely recite the spell as soon as something was wrong with William.

William naturally couldn't feel the changes in the outside world, and at this moment, all his thoughts were on resisting this irresistible biological instinct.

Due to the lack of spells, wizards must evaluate their willpower to avoid being assimilated by animal spirits, so that they can transform back into human form after completing their transformation.

This is the hardest step for Animagus, and it is where Animagus is daunting.

Many wizards have given up on practicing this very difficult and not necessarily useful skill, as the animals conjured by Animagus are highly uncertain and completely out of the control of the wizards themselves.

Just as William was suffering from soul fusion, he suddenly felt a strong feeling of suffocation, which was now a signal from the organs of this body to the brain, and his body lacked enough oxygen.

What's going on? I didn't hear Professor McGonagall say that there will be a lack of oxygen supply during the transformation of Animagus!

I guess I'm going to get a boxed lunch?

This was William's last consciousness, and after that, everything went dark, and William fell into a fainting due to the lack of oxygen.

"Merlin!" Professor McGonagall was speechless in astonishment, she never expected that William's Animagus transformation would be a success!

Across her desk, there was still William's shadow.

"What's going on, what kind of animal has he become?" With this in mind, Professor McGonagall stood up and looked at the chair opposite.

On the chair across from the desk, a crimson fish creature was popping and popping, looking quite energetic.

It has a long catfish-like whisker around its beak, and a golden crown-shaped fin on its head.

"Fish? This is really a very rare image of Animagus. I remember never before the wizard's Animagus form was an aquatic animal. Professor McGonagall thought seriously.

"Is this a carp? How did I look like this, how have I never seen a carp with a crown," she had apparently misunderstood William's actions, and at the moment she was staring at the "energetic" carp with her eyes in gold.

"Wait, why don't you move. William? William, can you hear me? ”

Looking at William, who was flapping his tail weakly, Professor McGonagall finally sensed that something was wrong.

"You can't be short of water."

If William was still conscious and able to speak at this time, then he would have complained about Professor McGonagall like crazy. Is it still necessary to think about such an obvious thing?

Looking at the carp twitching unconsciously on the office chair, Professor McGonagall flicked her wand and turned a lamp on the table into a transparent glass fish tank.

"Clear water is like a spring!" Professor McGonagall's spell rang out from the office, and streams of water gushed out of the witch's wand, filling the glass fish tank in just a split second.

Then, with a wave of her wand, Professor McGonagall gently lowered William's transformed carp into the fish tank.

"Merlin is on top, I hope it's still too late."