"Bang!"

At the back door of Hogwarts Castle, by the tunnel that connects the inner and outer lakes, two figures are fighting on the water.

On one side was Mad Eye Moody standing in a small boat, his magic eye turning nimbly, keeping an eye out for attacks from the air; On the other side, it was obvious, just by looking at the black gas swirling back and forth in the air, it was another Black Death.

The seasoned retired Auror was right, and when the main entrance was attacked by a large number of Death Eaters, the enemy had set up at the back door.

Voldemort had already attended Hogwarts and must have known the terrain very well, and it was for this reason that Moody hurried to the back door.

However, this route is not suitable for attack, because the bottom of the lake is not only inhabited by a colony of mermaids, but also a giant squid of astonishing size.

Although the natives were forced to make a pact with Hogwarts not to attack the school's ships, they were less polite to outsiders.

Therefore, the route of the underground dock of Hogwarts Castle can only be a sneak attack.

At this moment, Moody was holding his wand and constantly unleashing spells into the air, but he found that it was difficult to hurt the other party with all his might.

Although he is not in danger for the time being, it is definitely not possible to consume it like this.

"Bang!"

There was another high-impact thud, and the Black Dead who had just rushed towards Moody was shot off the beaten track and flew out of the lake for some distance.

"What the hell is this?" Old Moody said angrily, "I don't know when that kid will come back!" ”

As he spoke, he paused his crutches to stabilize the boat, which had been rocking from the impact.

Although Maca had also mentioned the existence of the Black Death, he hadn't even figured it out himself, so how could he explain it clearly?

For most modern wizards, this thing is really hard to deal with.

As a last resort, Moody had no choice but to keep pushing it back, while controlling the boat under his feet to retreat little by little.

Attacking on the ship is really not in his favor.

……

In the auditorium, the three Harry, like the other students, were discussing the situation outside in a low voice.

Of course, it's more speculation than discussion. After all, they were nesting here, and it was unknown what was going on outside.

“…… Don't you want to go out and have a look? ”

This sentence was still spoken, but surprisingly, it was Hermione who said it.

"Hey! It's not like you! Ron looked at Hermione with a strange look and said, "Since just now, you've been a little weird to put it in the past, and you're definitely the first to disagree with this kind of thing!" ”

"Really?" Hermione glared at him and said, "I'm just not worried about Hagrid, and ...... And we haven't seen where Maca is......"

At the sight of the word "Maca", Ron scratched his hair vigorously and closed his mouth strangely.

Hermione was obviously using Hagrid as an excuse, but she was still thinking about Maca!

Yes! Ron had indeed given up completely, and even encouraged Hermione in passing. But once I heard her mention Maca, my heart was still a little sullen.

"Harry, what do you think?"

Seeing that Ron didn't speak, Hermione looked at Harry again.

But Harry looked hesitant to be honest, he did look like he had gone out to see what was going on, and he was a little curious about where Maca and Fleur were.

But......

"Oh, yes...... Harry said, "but...... How are we going to get out? The professors are all watching! ”

Hearing this, Hermione suddenly smiled smugly.

"Look!" She took it out of her bosom, and then took out a black potion bottle, "This is the ...... that Maca gave me when the Final Three just decided on the Warriors"

Birthday present.

She said the word in her heart, and immediately felt a warmth quietly flooding, which made her even more determined to go out.

“…… This is the 'Immortal Hidden Elixir'...... If we have three minutes, although the stealth time will be shorter, it will definitely be enough for us to get out of here! ”

She looked left and right, then quietly pointed to the passage in the side porch and said, "Let's go from the foyer, where Professor Sprout should be the only one there!" The gate must be closed now, and if we want to get out, we have to go through the back door! ”

"Be careful, don't make a sound."

With that, she gently uncorked the potions vial, poured some into her mouth, and handed it to Harry.

If it were other stealth elixirs, it would definitely be discovered when used in public, but the properties of the immortal hidden elixir made Hermione disappear unconsciously.

As Hermione's presence diminished, Harry and Ron blinked a few times before they were no longer to be seen.

They subconsciously looked around, and it was really hard to imagine what the principle of this stealth was.

When Ron also drank the potion and disappeared in front of Harry's eyes, Harry took a deep breath, picked up the potion bottle that Ron had placed on the ground, and drank the rest of the potion with a puzzled face.

But to be honest, it's actually a very bad thing for three little wizards who can't see each other to go the same route.

The advantages of the immortal hidden elixir are indeed very significant, but the disadvantages are also obvious, this elixir cannot speak, cannot make noticeable sounds, and must be careful not to be touched by anyone.

But right now, there are really only two ways to get out of here and get outside.

One was the door of the Great Hall, which led to the lawn outside the castle, but now the door was full of professors; The other is through a corridor to the foyer and then through the castle gates.

In general, the gate was certainly an important defensive route. But because there is the Knights of Hogwarts Castle who defend themselves against the Magic Stone, only Pomona Sprout, the professor of herbal medicine, is there to guard there.

Yes, there was certainly nothing wrong with Hermione choosing that path. But the point is, the three of them can't see each other at all now!

If they accidentally touch each other, the invisibility effect will be immediately invalidated.

Hermione had read the potion instructions that Maca had written for her, but it wasn't until she had drunk the potion that she couldn't remember the problem.

“…… What to do? ”

Hermione stood still, watching Harry and Ron drink the potions in turn, but she couldn't speak, so she had to take the first step with an anxious face.

"I'm sorry, Harry, Ron!" She walked briskly towards the hallway, praying in her heart with an innocent face, "...... That one...... Good luck guys! ”

When Hermione made her way to the foyer, she immediately noticed that the heavy door had been tightly closed.

Professor Sprout wasn't at the gate, and Hermione glanced at the spiral stairs on either side of the door, and the professor was probably guarding the watchroom above!

She cautiously glanced down the hallway to the right, then tiptoed around the stairs to the long passage leading to the underground dock at the back door.

……

Not to mention Hermione's side, Harry and Ron had just passed through the side porch one after the other.

There was no way, after they found out that they couldn't see each other, somehow, they immediately felt a little weak.

The three of them still have a care to take care of when they are together, at least if there are people around them, at least they can feel much more at ease. But now they all felt as if they were the only ones secretly leaving the auditorium.

The two of them stood in place with their heads shrunk for a while, constantly looking back and forth, until they remembered that there was still a time limit, and then they had to "move" from the middle of their classmates to the passage of the side corridor with their legs stretched out and in shock.

If anyone could see through the invisibility, they would see a scene of two young wizards in Gryffindor robes, shrunk their heads and standing on tiptoe, walking towards the foyer like two thieves.

They even followed similar routes, Ron in front and Harry behind, cringing back to the other corner of the side porch.

Then, Ron stopped abruptly

"Oh!" "Ahh

With two overlapping whispers, Harry's entire face was pressed against Ron's back, and needless to say, both of them were startled!

Ron turned around suddenly, and the two of them covered their mouths and widened their eyes, looking at each other in horror, looking at each other at a loss.

Harry hurriedly gestured around the corner, and Ron immediately nodded and glanced out into the foyer.

When Ron finally saw that there was no one in the hallway, he turned around, waved his hand vigorously at Harry, and then pointed to the passage behind the stairs.

After Harry nodded, the two of them looked into the foyer again, and after making sure that no one was there, they slowed down and ran down the dark passageway.

Their figures had barely been drowned out by the darkness in the passageway, and a man immediately stepped down the spiral staircase next to the gate.

It was the chubby Professor Sprout, and she looked warily into the foyer for a long time, and even checked it with a spell to find that there was no one, and then returned to the lookout room with a puzzled expression.

The battle at the school gate continues, and she must stay here so that she can be ready to tell Professor McGonagall to come over and start the Knights of the Stone.

……

In dimly lit passages, torches are only available at long distances to provide light that barely allows for a glimpse of the ground ahead.

The passage is slightly sloping downwards and leads directly to the underground dock at the back door, where every freshman walks through to the auditorium for the orientation dinner.

At the moment, Hermione was slowing her steps as lightly as she could, so as not to make echoes when she walked.

But just as she could almost see the outline of the back door, she noticed a sound of footsteps behind her that made her hair stand on end

"Those two fools!" She hurriedly leaned sideways against the wall, clinging to the wall of the hallway, not daring to move.

"Who?"

Outside the back door, a rickety figure suddenly walked in, carrying a lantern and looking inside, it was Filch, the janitor!