Behind Dumbledore were none other than Professor Krell, Professor Snape, and others. Professor Krell was slightly weak, and Snape's eyes were filled with flames of unknown meaning.

"Dumbledore, stop being foolish, you don't know what you're up against."

The person Dumbledore called "Alger" was none other than Cook Alger, the rumored former Defence Against the Dark Arts professor who died unexpectedly last year.

He still hadn't taken off his mask, and his voice was tinged with a hint of hideousness through his mask. He raised his head and looked Dumbledore squarely.

"No, I know."

Dumbledore whispered, his wand raised.

As the swords rattle, a gust of black wind blew into the battlefield, and the black robe that pursued Norin quickly appeared.

"Why is it so slow!"

Cook Alger gritted his teeth and asked in a low voice, "Did you get the thing?" ”

"It's here."

The black robe replied, with a hint of residual anger in his voice, "I ran into a little ghost and delayed for some time." ”

"It's a little ghost again."

Alger scolded irritably, and Dumbledore and the others changed their faces.

Dumbledore tilted his head slightly towards Professor McGonagall, who disappeared without much hesitation.

"Whatever you get, it's the public property of Hogwarts."

Dumbledore stepped forward, his voice sharpening. The long beard is windless, and its breath becomes extremely sharp.

"What did you do with that student?"

Professor Krell coughed slightly and interjected.

"Yaxley, you despicable ...... Hypocrites ......"

As soon as he heard his voice, Alger's eyes turned red, and there was deep malice in his words.

"When did you deserve to say something like 'trust'?" Professor Krel's tone became impatient, and with a hint of anxiety, he shouted to the black-robed man who came last:

"Say!"

The black robe smiled and said gloomily:

"Slaughtered with your hands, the life-requiring spell hit the chest."

If Norlin was there, he would definitely spit in his face.

Professor Krell's momentum skyrocketed, and his eyes were as red as blood:

"Then you will be buried together."

As he spoke, a spell came out of his hand.

"Don't take your enemy's word for it, Krell."

Dumbledore spoke, his azure eyes glinting under the half-moon eyes, trying to suppress Professor Krel's anger a little and regain his senses.

"Broken bones!"

A black-robed man suddenly shouted, and his wand burst with red light. Dumbledore and the others were shocked, and subconsciously constructed a magic barrier, only to find that the target of the shattering spell was not them, but the large mirror behind the black robe.

The mirror shattered, shattering into shards on the floor, revealing an old passage behind it.

"It's not good—"

Dumbledore immediately understood their intentions. He pointed his wand at the entrance of the passageway, and a reticulated spell blocked their path.

Professor Krell and the others also reacted quickly and assisted Dumbledore in reinforcing the spell.

The rest of the black-robed men swung their wands to attack, and the scuffle began.

"Dumbledore, you don't understand what power your master has bestowed—"

Alger laughed wildly and roared:

"Touch of Chaos!"

Countless tentacles stabbed out of the air. They are all swarthy, and their flesh thorns grow on their tentacles, entwined with the black gas that wafts away, and you can clearly feel the chaos and wildness in them.

"No, I know."

Professor Krell and the others were in a hurry for a while, and they retreated again and again to be able to defend, but Dumbledore's expression was a little complicated, and he said again,

"Guardian of the Light."

The tip of his staff shone brightly, and a dazzling light covered several professors behind him. The tentacles slammed viciously into the shield of light, again and again in vain.

There seemed to be a roar of rage in the air, a sense of extreme rage that the desire for destruction was not satisfied.

Alger and several other black-robed people subconsciously blocked their eyes with their hands.

"Broken!"

Alger looked at Dumbledore in disbelief, and a sense of powerlessness began to build in his mind. He gritted his teeth and turned his head and rushed towards the entrance of the passage.

All the tentacles in the air changed their targets in an instant, colliding with the net spell with all their might.

No matter how deep Dumbledore's magic was, it was briefly torn open, and Alger didn't dare to hesitate, and directly led someone to force it through.

"Withdraw!"

Several black-robed men retreated quickly, and just as Professor Krell wanted to pursue, he heard several shouts from inside at the same time:

"Broken bones!"

"Thunderbolt Explosion!"

The amount of mana output nearly drained them all.

The next moment, several huge pieces of rubble fell from the top of the passage with such a loud noise that it seemed as if the entire castle had shaken, and it was full of smoke and dust.

The secret passage collapsed.

"Damn—"

Professor Krell smashed a spell on the rubble, blasting the ground open with debris, but the entrance to the secret passage was still tightly blocked.

Obviously, it is not easy and quick to get through the entrance again.

"I've checked, and there are no fewer people."

Professor Krell punched the gravel with an unwilling expression, and Professor McGonagall's voice rang out first, as she arrived in a hurry.

Hearing this, both Dumbledore and Professor Krell's faces softened. In contrast, chasing the fleeing black robes was not as a high priority.

Snape felt the residual breath in the air, and with a hint of curiosity in his cold face, he said, "There is no doubt that pure black magic is true, but I don't seem to have seen it before." ”

"There are so many types of black magic, how can you know them all."

Dumbledore said casually, lightly brushing the topic over, and said suspiciously,

"The question is, how do they know about this secret passage?"

Even he didn't know that there was a secret passage in the castle, which had to make him wary.

Professor Krell's face froze, and he was silent at the faint thought of a possibility.

"Let's go back first. The students were worried. ”

Professor McGonagall spoke. Some of the senior students even volunteered to help, and although she didn't agree, her heart was warm.

"Hmm."

Dumbledore nodded in agreement, he glanced at the secret passage a few times, and continued,

"In that case, there is no need to clear this secret passage. Just let it be sealed. ”

……

Counting the time, the students spent less than half an hour in the common room.

When they returned to the auditorium, it was as if nothing had happened.

Dumbledore stood on the professor's seat, coughed twice to signal silence below, and said in a loud voice:

"Something happened, but the enemy has been kicked out of Hogwarts, don't worry. Also, I needed some senior classmates to help tidy up the library, and it was a disaster. ”

"Finally, I wish you all a Merry Christmas."

Pekacy walked out very consciously, and Norlin looked at her back, rubbed her red ears, and sighed sadly in her heart, this girl's hands are really strong.