Facing this powerful magic gathered from the strength of several dark wizards, Harry wore a brilliant smile, waved his wand, and chanted: "Avada Lightning Chain!"

Instantly, a magical beam, completely different from the usual Killing Curse, erupted from the tip of Harry's wand.

The Avada Lightning Chain's magical beam resembled an electric current, crackling in the air as it collided head-on with the Killing Curses cast by the many dark wizards.

In an instant, light burst forth, and powerful magical fluctuations spread out from the point of impact like an invisible storm, raging in all directions.

Shockingly, in this clash of power, the one gaining the upper hand was Harry's solitary Avada Lightning Chain!

"How is this possible!"

"No, push harder, we must kill him!"

"Damn it, monster, he's a monster!"

The Killing Curse and Avada Lightning Chain wrestled in the air for a moment. After Harry confirmed the effectiveness of the Avada Lightning Chain in a head-on magical confrontation, he nodded slightly and then waved his wand forcefully.

The next moment, the focal point of the two beams' collision lost its balance, rapidly flying towards the direction of the many dark wizards!

The Avada Lightning Chain first landed on a dark wizard. A piercing scream tore through the sky as the dark wizard's soul was completely obliterated.

Seeing this, the other dark wizards felt a tightness in their hearts at first, followed by a secret sigh of relief, thinking that this terrifying crisis had finally been temporarily alleviated.

However, before their relief could fully rise from the bottom of their hearts, the change occurred again without warning.

Blinding green lightning bolts, like demonic snakes crawling out of the abyss of hell, crazily splashed out from the gradually ash-turning corpse.

These lightning bolts were extremely fast, engulfing all the dark wizards in almost the blink of an eye.

Except for the strongest, the charming witch, who quickly erected an earth wall using Transfiguration magic, protecting herself from death, the other dark wizards were instantly annihilated by the Avada Lightning Chain!

In the end, the charming witch stood trembling on the many corpses, afraid to move.

Suddenly, a stream of murky yellow liquid slowly flowed down between her legs, dripping down her trembling calves, staining the dusty and bloody ground with a striking mark.

The charming witch's legs went weak, almost unable to stand, and she pleaded in a trembling voice, with a sobbing tone: "Brother, sister really knows she was wrong, please spare sister's life!"

Harry responded with a gentle smile: "Don't worry, sister, I know you didn't really want my life. I never kill women."

After speaking, Harry walked towards the outside of the alley with leisurely steps.

Seeing Harry completely exposing his back to her without any defenses, a hint of ruthlessness flashed across the charming witch's originally alluring face as she prepared to strike.

Just as she was about to launch her attack at the critical moment, a sudden change occurred!

A giant palm, several meters in diameter, drilled out rapidly from under the soil, engulfing her and all the corpses of the dark wizards before the charming witch could make any reaction.

As the giant palm squeezed forcefully, a chilling sound of bones cracking and muscles being compressed echoed in the air.

Strands of blood, like winding streams, slowly squeezed out from between the giant palm's fingers, staining the ground with a shocking patch of blood.

In the blink of an eye, everything returned to calm.

The stone giant palm slowly loosened and merged into the ground, along with the bodies of the dark wizards and the charming witch, disappearing without a trace, as if they had never existed in this world.

Not far away, Harry's footsteps did not stop, and the corners of his mouth slightly raised as he softly murmured: "Magic test, perfectly completed."

— — — — — —

Since Harry first successfully completed the test of the Avada Lightning Chain, Knockturn Alley became his frequently visited testing ground, which he would go to every few days.

For the first two times, everything was calm, but as the number of times increased, the shrewd and sinister dark wizards in Knockturn Alley immediately noticed the abnormality.

Until Harry went for the last time, he carefully disguised himself, lowered his head, and deliberately made his shoulders tremble slightly, making himself look exactly like a small wizard whose heart was clenched by fear and who was timid and cowardly.

But even if he disguised himself flawlessly, the dark wizards in Knockturn Alley, who had been wandering in the dark for many years, still became alert like wild beasts that had smelled a dangerous aura.

Whenever they saw him appear, they would immediately move away like frightened mice, not daring to step forward at all.

Harry looked at this scene, his heart filled with helplessness.

He understood that his magic test had aroused the extreme vigilance of the dark wizards in Knockturn Alley. Under such circumstances, it was impossible to continue the test.

Helpless, Harry could only suspend the magic test.

However, with the help of dozens of dark wizards, he completely completed the Avada Lightning Chain. This time, the Lightning Chain was able to extend the attack target of the Avada Kedavra from a single individual to more than a dozen at once.

This leap was undoubtedly a bold innovation to traditional magic, greatly improving work efficiency.

In addition to the breakthrough in the Avada Lightning Chain, Harry also made new breakthroughs in the research of potions and mental projection.

Among them, he has found the idea for the research of mental projection. It seems that when he returns to the multiverse world, he can rely on the technology there to achieve mental projection, so as to place the loan system in the souls of the borrowers.

In addition, he also has a shocking discovery about potions.

As long as fixed potions are combined with chaotic magic to concoct them, they can be used to give others extraordinary power.

The potion recipe he has currently discovered is named Assassin. After taking the potion, the physical fitness is significantly improved, the reaction is agile, the strength is enhanced, the movement is silent, good at hiding, and quietly approaching the target in the shadows.

Harry is preparing to use the Assassin potion as the foundation to research a system that can create extraordinary people in batches.

He named this the Potion System.

However, even the initial Assassin potion has not been perfected by him, and this potion system will take a long time to break through.

After that, Harry accompanied the Dursley family on a tour of Diagon Alley, and also took the time to Apparate to Little Otter's house to build a portal in her home. Harry spent the last few days of the Christmas holiday under Little Otter's constant clinging.

— — — — — —

The joy of the Christmas holiday is like brilliant fireworks, fleeting.

Harry dragged his suitcase back to his dormitory the day before school started.

When he pushed open the dormitory door, the warm yellow light instantly poured in, enveloping him.

His roommates had already gathered here, their laughter colliding and intertwining in the small space. Only then did Harry realize that he was the last one to return to school.

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Ron was sitting on the bed organizing his schoolbag. Hearing the sound of the door opening, he said sourly: "Oh, Harry, you're finally back. It seems that you had a very good Christmas holiday, unlike me, who can only be alone."

Harry was a little embarrassed and tried to change the subject.

Just then, he suddenly saw a beautifully wrapped package placed on his bed, walked over with some doubts, and asked: "What is this?"

The package was wrapped in dark green velvet paper, tied with a scarlet ribbon, which looked particularly eye-catching under the dim yellow light.

This was obviously a Christmas gift.

His friends all knew that he had returned to the Muggle world for the holiday, and the previous gifts were sent directly to the Dursley's house.

So, who exactly sent this gift?

Ron shrugged his shoulders, his face full of confusion: "I have no idea at all. That day, I had just woken up, and as soon as I opened my eyes, I saw this package lying quietly on your bed. Open it and take a look, I'm very curious about what's inside?"

Harry opened it, and inside was a shimmering silver fabric. It felt strange in his hand, as if it was woven with water.

"It's an Invisibility Cloak," Ron said, with a look of eagerness to try. "I'm sure, put it on and try it."

Harry draped the Invisibility Cloak over his shoulders, and Ron exclaimed: "It really is, look down quickly!"

Harry looked down at his feet, they were gone. He walked in front of the mirror, and in the mirror, only his head was suspended in mid-air, and his body was completely invisible. When he pulled the Invisibility Cloak over his head, he was completely hidden in the mirror.

"There's a note!" Ron suddenly said, "A note fell out of it!"

Harry took off the Invisibility Cloak and grabbed the letter. It was written in a slender, looping font that he had never seen before, with the following lines:

"Your father left this with me before he died.

Now it should be returned to you.

Use it well.

Sincerely wish you a Merry Christmas."

No signature.

Harry stared at the note in a daze, while Ron was admiring the Invisibility Cloak.

"I would give anything to get something like this," Ron said enviously. Suddenly, he noticed that Harry was stunned there, as if in a daze. "What's wrong with you?"

"It's nothing," Harry said. He felt that this matter was very strange. Who sent the Invisibility Cloak? Did it really belong to his father before?

Just as Harry's fingers touched the Invisibility Cloak, a faint, strange wave was transmitted along his fingertips into his perception.

His pupils shrank suddenly, and an unbelievable expression instantly appeared on his face. A very subtle dimension magic was attached to this Invisibility Cloak!

It seemed to belong to a certain dimensional demon god, but the state of that dimensional demon god seemed to be a little wrong.

He seemed to be—underdeveloped?

Harry immediately thought of the legend of the Deathly Hallows, the three Peverell brothers obtained three gifts from Death, and these three gifts were the Deathly Hallows.

Among them, the Invisibility Cloak is also one of the Deathly Hallows. It is different from ordinary Invisibility Cloaks. Its invisibility effect is very perfect and will not be invalidated by time or magical interference.

Harry thought that the Potter family is also a pure-blood family with a long history, so could it be that the Potter family is a descendant of Ignotus among the Peverell brothers?

Harry guessed that it should be the case, and planned to ask Dumbledore about it.

However, just as he was about to set off, another thing completely attracted his attention...

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