In the following few days, in order to avoid the crazy crowds, Link either clung closely to Emily every day or locked himself inside the Room of Requirement to research Sectumsempra and the Refilling Charm.
Link had not forgotten Tom Riddle's previous words about power above all.
Although that kind of view was a bit too extreme, Link could not deny that there was indeed some truth in it.
And under his unremitting efforts, he really did develop a few rather practical techniques.
Among them, the upgraded LV4 Sensory Charm gave Link a surprise.
This time, it didn't give Link any new abilities, but on its original attributes, there was a huge amplification.
Thanks to it, Link could now already see the fine seal lines on Arkam's eyes, and he believed that as long as he was given a bit more time, he would be fully capable of switching this seal on and off freely.
Additionally, although the upgraded LV5 Refilling Charm itself didn't have such outstanding effects, Link discovered that it still had certain uses in human body healing and environmental control.
The former had effects such as replenishing blood for the injured to prevent excessive blood loss, increasing blood pressure, or making a certain body part engorge to quickly and lastingly enlarge (crossed out) and so on.
The latter could be used to create foggy weather, swamps, or lakes.
And compared to the "chicken-rib" (i.e., not-so-useful) nature of the Refilling Charm, the Sectumsempra spell which broke through the limit level this time was far stronger.
Based on the previously demonstrated technique he had named "Shadow Explosion Spike", Link developed a whole series of offensive spells such as "Cursed Arrow", "Cursed Shackles", and so on.
The cursed force energy inherently possessed extremely strong destructive and corrosive ability, and with the ability Link gained from upgrading Sectumsempra, it also had the same "anti-heal" effect as Sectumsempra, that is, wounds couldn't be healed with counter-curses.
This made the cursed force's use in offensive and torture-type spells extraordinarily outstanding.
But it wasn't without drawbacks.
Precisely due to its powerful corrosiveness and anti-healing effect, the utility-type uses that Link originally envisioned, such as using cursed force to grab objects like a wizard's spiritual hand, were all unusable.
After all, cursed force destroys whatever it touches.
And this made Link all the more eager for the Refilling Charm to be upgraded to LV6. Because if cursed force couldn't be used, then liquid-type things like water could always do the job.
But to upgrade the Refilling Charm to LV6, a golden skill point was required.
According to the earlier dark-gold message panel's description, Link's last golden skill point had been obtained through destroying a Horcrux.
So, Link once again turned his attention to the Room of Hidden Things inside the Room of Requirement.
As a transmigrator, he had not forgotten the Ravenclaw House treasure, Ravenclaw's diadem, which had also been made into a Horcrux by Voldemort and had been hidden in the Room of Hidden Things inside the Room of Requirement.
Immediately, Link brought Arkam with him and began to search the entire storage room.
However, three days passed, and Link still found nothing.
In the Room of Hidden Things inside the Room of Requirement, Link looked at the mountains of junk and clutter around him, and in the end, let out a long sigh.
Originally, in his view, this ought to have been an easy task. After all, he remembered that in the plot, Harry had solved the diadem problem without much effort.
But once he actually began, he realized he had been too naïve.
To find the diadem among so much trash and clutter, even with the Sensory Charm, was like looking for a needle in the sea.
"Link, if you ask me, we should just give up." At that moment, Arkam also poked out from Link's collar and said this with a bit of hope.
Link's original plan had been to find the diadem and then have Arkam bite it hard with his fangs to destroy the Horcrux.
However, having been frightened by Tom Riddle before, Arkam was extremely resistant to this idea.
Even though Arkam didn't say it out loud, Link could still sense it.
Looking at Arkam's hopeful little eyes, Link in the end still sighed and said, "Alright, for now, we can only temporarily give up."
Upon hearing this, Arkam happily wrapped around Link's neck on the spot, startling the yoyo that had been sleeping on Link's neck.
Link also shook his head with a smile, and not bothering with the messiness of his clothes, walked directly toward the Great Hall.
What he said about giving up temporarily wasn't just to comfort Arkam, he really could only do so.
Because tomorrow, he would be leaving Hogwarts and going home together with the other students. And tonight, there was still a feast waiting for him.
Perhaps considering that the Chamber of Secrets incident had left behind psychological shadows in the students that needed to be released, this year's feast was different from those of previous years. This year, Dumbledore was especially generous.
He and Professor McGonagall not only didn't require students to wear formal school uniforms like in past years, but even unprecedentedly allowed the students to celebrate in the Great Hall until dawn.
As a result, when Link arrived at the Great Hall, it had already become an ocean of joy in advance.
Everyone was gathered around their house's long tables, laughing and chatting happily. Among them, ghosts would pop out from time to time to scare people, then laugh and dive back into the walls.
The noise of the crowd made Link's eardrums hurt.
Aside from that, the Great Hall at this moment had also unusually lit up those floating candles that only appeared during the first-years' opening ceremony.
The candlelight in the Great Hall and the starry river projected on the enchanted ceiling complemented each other beautifully.
Link was momentarily stunned looking at it.
"Link! What are you daydreaming about! Hurry over here!"
Cedric's voice, which had become a bit strange due to puberty, successfully woke Link up.
And only then did Link notice that he had already been surrounded by a large group of students.
One by one, they blinked their shiny big eyes at him, their expressions looking like they wanted to snatch Link back to their house.
Link's expression immediately changed. This was exactly why he had to hide in the Room of Requirement to develop spells earlier.
The events in the Forbidden Forest had, after some time to ferment and continuous magical "editing" by other Hufflepuff students, turned into countless fantasy-like versions.
Now, aside from a few hardliners in Slytherin, almost every student was eager to have close contact with Link.
In the past, with the help of the Sensory Charm, he could escape before crowds formed. But this time, he was already surrounded.
At the same time, seeing Link still unresponsive, Cedric grew anxious.
He didn't care anymore, and directly brought a bunch of Hufflepuffs into the crowd, finally managing to escort Link back to the Hufflepuff long table.
At this point, the crowd that had gathered unwillingly dispersed.
And Link, wiping the cold sweat from his forehead, sighed, "Fortunately, I had you guys, otherwise I really wouldn't have known what to do!"
"No need to be polite," Cedric grinned and said, "I know you don't like this kind of situation."
After speaking, Cedric and Link exchanged a smile.
And at the same time, Dumbledore and the other professors finally walked into the Great Hall from the entrance hall.
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