The sudden change was like a basin of boiling water, poured into the boiling oil.

The loud explosions, the dazzling firelight, the rising smoke, and the faint tremors under their feet made the visitors who were still in the Fire Dragon Park stand still.

What's going on? A prank in the park? New shows? Or—

"Enemy attack!"

On the glass trestle near the visitor reception hall, Neville was the first to react.

Having been reminded by Clark in advance, he firmly grasped the handrail of the plank road against the rock wall because of his keen perception of danger at the first moment of the explosion.

These stout railings were all deeply embedded in the rock wall, and at this moment, even if the trestle was twisted and crooked because of the explosion, it did not fall off.

After the explosion subsided, the disgraced Neville reacted very quickly, and pulled out the sword at his waist with a "swish".

The sword made by the goblin shimmered with a cold light, "All the members of the escort team are moving closer to me and preparing for battle!" ”

Neville raised his sword, his angular face full of seriousness.

But before he could gather his manpower, a meteor flew out of the dusty ruins of the reception hall and rushed straight into the sky of the Dragon Farm.

That's—

Neville's eyes widened to tell what it was, and the next moment, the meteor suddenly expanded.

A huge, crystal-clear, peculiar bottle carved from the finest transparent crystal appeared in the sky of the dragon farm.

The shape of the bottle was very strange, the mouth of the bottle extended outward infinitely, and in a circle, there was a space that did not know where it existed, burrowed into the inside of the bottle, and then connected to the hole at the bottom of the bottle.

As a result, the whole bottle does not have a "head" and "tail" in the conventional sense, and there is no concept of "edge" that an object should have.

It has only one side, and if there is a fly inside the bottle, then it can fly directly to the outside without going through the surface, because there is no inside or outside at all.

"It's—the Klein Vial!"

Clarke, who was attracted by the sound of the explosion and ran out of the theater, looked up to see this strange and huge glass object.

No! Maybe it wasn't glass at all, and Clark could smell a hint of space from it.

It's just what the hell is this thing for, and who are those people who attacked Fire Dragon Park?

Soon, the giant Klein bottle took on its role.

With a crackling and crisp cracking sound, countless crystal clear glass shards that seemed to contain countless faces burst out of the Klein bottle and merged into the canopy of the dragon farm.

At this moment, the magically created sky seemed to become higher and more profound, almost the same as the real sky.

Clark saw a wizard cast a transfiguration spell not far from him.

However, I saw him turn in a circle, and his whole body collapsed and condensed, as if he had entered some invisible pipe, and then the next moment he came out of another place not far away.

The Transfiguration Charm failed?!

No, the wizard didn't lack arms or legs, and the spell was successfully cast, but the entire space of the dragon farm was touched by the Klein bottle just now, so he spun around and returned to the same place.

And this is precisely the characteristic represented by the Klein bottle - a non-orientable two-dimensional compact manifold that can only be truly expressed in four-dimensional space, that is, an infinitely circular surface.

This "bottle" was first discovered and named in 1882 by the famous German mathematician Felix Klein.

In the Muggle world, this is just a mathematical surface model that exists in the concept, but I don't know who actually made it using the alchemical methods of the wizarding world.

Therefore, this thing extracted the "circulation" concept of the "Klein Bottle", and turned the entire dragon farm into a space that is independent of the world and circulates inside and outside

That's why the wizard just now couldn't use Apparition to leave.

"This is a problem!" Looking at this scene in front of him, Clarke's heart sank.

Being able to use such enclosed space magic items, the attackers must not be simple characters, and they may even represent a certain force.

He didn't care about Blake and Peter Pettigrew anymore, and he galloped towards the place where the explosion had occurred.

At this time, the tourists who stayed in the park were also panicked because of this sudden change.

On the crowded commercial street, the cries of children, the shouts of adults, and the quarrels caused by pushing each other are chaotic.

The 12-year career of peace is neither long nor short.

Many of the adult wizards present were almost about to forget the dark and turbulent era of more than ten years ago.

So much so that in the face of such an unexpected situation, they were so flustered that they didn't know what to do.

Clark directly opened the way with his psychic ability, controlling those passers-by to make way for him, and rushed halfway up the mountain as fast as he could.

At the same time, they did not forget to order the employees of those parks to evacuate visitors to the store as soon as possible to prevent a stampede and cause greater damage.

Fortunately, not everyone was so useless, and on the way to the scene of the incident, Clark also saw some bold wizards, as well as some senior Hogwarts students, all holding wands, walking against the crowd like him.

It's just that they are still a long way from the place where the explosion occurred.

At this time, halfway up the mountain, although he didn't understand the use of the huge glass bottle used by the other party, Neville still didn't dare to take it lightly.

All fighters are the most jealous of indecision, so he couldn't wait for the other security personnel to get closer, and directly took the sword and got into the smoke and dust.

As we got closer to the ruins of the reception hall, the glass walkway shook as if it was going to collapse at any moment.

However, Neville walked on it, walking on the ground, his body shimmering with magical light, and he was covered with layers of magical shields.

Just as he was about to approach the reception hall, an alarm flashed in his heart, and Neville rolled over in advance, avoiding the sharp cold light that swept overhead.

"A little kid?"

Neville bounced off the ground with his sword across his chest, facing the enemy in the easiest way possible.

On the trestle not far in front of him, a tall mysterious man in a black cloak was standing.

The sunlight from the sky shone through the smoke and dust, casting a pillar of yellow light, and then these rays, Neville noticed.

The mysterious man in front of him had slender limbs and a strong physique, and his originally loose robe was uncomfortably tightly tightened on his body.

On the two exposed hands, the dirty fingertips had long blue-gray nails, which looked like sharp claws made of steel, glowing with a dangerous cold light.

It was this man who attacked him with a wave of his claws.

"In such a big place, it's just you and a little guy guarding it?"

The mysterious man lowered his head, his face hidden in the shadow of the hood, obviously not moving, but the vigilance in Neville's heart was the highest, and he felt the aura of danger from this person's body.

"To deal with you, I alone is enough!"

In the midst of danger, Neville's voice was still full of determination.

When the mysterious man heard this, his whole body trembled with excitement, and his hair raised his head with a long, piercing roar, like blowing a rusty horn.

The next moment, he squatted on his knees, kicked his slender legs the ground, and then the whole person was like a cannonball, directly crashing into the thin dust in front of him, and pounced on the little guy holding a long sword in front of him.

Rumble!

The tempered glass, which was hard enough to withstand a dozen people walking on it, let out an overwhelmed moan under the great force.

Neville raised his sword up with feeling, and before he could unleash it, a majestic force passed through his sword.

That force is not an ordinary brute force, it is clearly mixed with several forces of different strengths and weaknesses and different directions, which converge and disperse with each other.

It's like a whirlpool in the sea, the sharp teeth of a beast, in the process of biting, twisting, pulling, and swaying, without biting off a piece of meat from the target, and vowing not to give up.

He looked at it, and it turned out that his long sword was firmly grasped by the other party's hands, and the blue-black nails and the bright blade of the sword scraped each other, and they actually splattered dark red to get sparks.

The other party is ready to hand over his weapon empty-handed first!

The sheer force made Neville's sword turn into a frantically writhing fish at this moment, as if it was about to break free from his grasp.

However, this mysterious man just regarded him as a child, which was really a mistake, he didn't know that the honest and honest boy in front of him was the only [Arcane Knight] in this world.

His own strength attribute is not low, not to mention that he can also cast spells......

With Neville's loud shout, his whole person quickly swelled with the blessing of the [Transformation Technique], and his broad shoulders and strong back muscles quickly constructed a perfect inverted triangle.

So in the feeling of the mysterious man, the big fish in his palm, which was about to be tamed, instantly solidified and hardened, turning into a thick and calm, like a steep mountain peak standing still on the vast plain, and it could no longer be shaken.

"Not good!"

The mysterious man's reaction was not unpleasant, and his years of life and death in the dark world, coupled with the magical power given by the special bloodline, had already made his intuitive ability to perceive danger reach an extraordinary level.

Compared to him, the so-called special forces kings in the Muggle world can only be regarded as younger brothers.

However, even so, the fairy sword in Neville's hand was twisted hard before he let go.

"Ahh

The mysterious man screamed miserably, and ten slender fingers fell into the dust with spilled fishy blood, stained with a layer of white color.

If you want to take the white blade empty-handed, you have to be Li Jing.

If it had been Clark, this complaint might have been said a long time ago.

However, now the mysterious man is facing Neville, who doesn't like words, so when he retreats and runs away, Neville, who casts the [Anointment of Feet] spell on himself, chases after him at a faster speed.

The cold light shone brightly, and before the mysterious man could even say another word, the whole man staggered past Neville, and then the hooded head rolled around the ground a few times, and stopped at a pair of worn cowhide boots.

"Useless garbage!"

The owner of the boot kicked the unwilling head away in disgust, and spat on it by the way.

Neville, who had just dissolved the spell and returned to his normal size, saw that the other party still had accomplices, and after killing the enemy, he didn't care about adjusting his state, and hurriedly retreated again, away from the comer.

In the process, the newcomers didn't chase after them, and then there were footsteps behind Neville, and some of the park guards who had just fallen behind finally arrived.

With seven or eight armed companions as his back, Neville's courage was at once sufficient.

He pointed his sword forward, stood upright, looked at the new attackers, about seven or eight people, and asked in a loud voice, "Who are you?" Why attack here? ”

The leader of the group was the big man in cowhide boots, and in the face of Neville's questioning, he lifted his hood, revealing the menacing appearance below.

"I smell the sweet smell in the air," the man shrugged the tip of his nose, as if to smell something in the air, "it's the milky smell of the child, and it's a delight!" ”

One of the team members standing behind Neville recognized the man's face with his gray hair and beard knotted together, blue-black eyes with whiter whites than pupils, and the sharp teeth that were exposed when he added the scar under his left eye and grinned.

"Are you...... Greyback ...... Fenrir Greyback! ”

The child's voice was still shaking, the name was so familiar to the children of the wizarding world, and it was so terrifying.

Fenrir Greyback, one of the most notorious and cruel in the world of British wizarding.

He is a werewolf, a dark creature who is discriminated against, disgusted and ostracized by wizards.

The wizards call him a filthy, corrosive animal, a long-haired monster with a low IQ, but at the same time they are terribly afraid of him.

Because Fenrir Greyback's philosophy is: "Blood is what werewolves deserve, and werewolves should take revenge on normal people." ”

He made it his goal to bite and infect as many people as possible, and wanted to create enough werewolves to conquer wizards through this method.

And one of the most criticized things about him is that he likes to bite children and then let them grow up away from their parents, grow up with hatred for normal wizards, and then spread new fears and despair.

Obviously, such a guy who is known for his cruelty and evil, and specializes in spreading fear, has now come to the Dragon Park, where children can play and play.

"This is a problem!"

Neville's mouth was full of bitterness.

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