After ordering a steak and a glass of mead to fill his stomach, Eisen began his studies. By seven in the evening, Eisen closed the book Magical Theory and let out a long sigh.
After reading through the book, Eisen gained a general understanding of magic in this world. Based on his memories from his previous life and the contents of this book, he realized that for wizards to cast spells successfully, in addition to requiring control over their internal magic and the wand movements, another crucial factor was strong emotions.
With this understanding, Eisen now saw why many adult wizards struggled to effectively cast advanced spells. In his view, spellcasting in this world was quite challenging.
For example, when Professor Flitwick taught young wizards the Levitation Charm at Hogwarts, the incantation "Wingardium Leviosa" required the "gar" sound to be pronounced clearly and drawn out.
Getting the incantation right wasn't enough. The wand movement had strict requirements as well, specifically the "swish and flick." On top of that, the wizard had to channel their emotions to successfully cast the spell.
The importance of emotional focus was most evident in Unforgivable Curses and the Patronus Charm.
To cast an Unforgivable Curse, the caster had to summon intense malice from deep within, with the clear intent to kill the target. Only with this level of malice could the curse unleash its full power.
The Patronus Charm, on the other hand, required the caster to channel extremely positive emotions.
Young wizards learning this spell were instructed to recall their happiest memories while casting it, as this was the best way to summon such emotions.
Of course, Eisen had another theory about this. He believed that the emotional focus required for spellcasting was simply an expression of inner intent.
This intent, combined with the wand and magic, allowed the spell to manifest.
The reason for this speculation lay in the phenomenon of accidental magic in young wizards.
Take Harry Potter, for instance. Before attending Hogwarts, he couldn't cast spells intentionally, yet he once made the glass at the zoo disappear.
This was clearly a case of his magic responding to his strong subconscious desire, resulting in a temporary vanishing spell.
As for young wizards learning spells step by step under strict guidance, Eisen suspected this was a system carefully developed by Hogwarts to help them gradually gain control over their magic.
If young wizards followed the professors' teachings diligently, by the time they graduated, they would have full mastery of their magic. Spellcasting would then become almost instinctive.
As a result, casting spells after graduation would become easier and more fluid. The rigid wand movements and incantations would no longer be necessary. This was the origin of the advanced techniques of nonverbal and wandless magic.
However, these techniques were extremely difficult, and very few adult wizards could perform them. In Eisen's view, this was because their education hadn't gone deep enough.
Exceptions like Dumbledore and Voldemort, of course, were in a league of their own.
With this general understanding of magic, Eisen recalled some details he hadn't paid attention to before. The spells in this world were peculiar. Some had been passed down through generations, while others were created by individual wizards.
For example, Professor Snape had invented a powerful spell, the Sectumsempra Curse. Only its counter-curse could undo its effects, making it nearly unstoppable.
This raised the question: how had Snape invented this spell? Eisen guessed it was due to his profound knowledge of charms, potions, and dark magic. With such expertise and an intense emotional drive, he had likely developed the spell.
But for Eisen, who was still new to magic, this remained speculation.
Setting Magical Theory aside, Eisen picked up The Standard Book of Spells, Grade 1. As a complete novice, he had to start with the basics.
He tore a page from his notebook, steadied his breathing, and drew his wand.
"Wingardium Leviosa!" Eisen waved his wand, pointing at the torn page. To his surprise, the page slowly rose into the air as he moved his wand.
Next, he set the wand aside and pointed at the page with his finger, attempting the spell again. It worked just as well.
Succeeding twice in a row filled Eisen with indescribable joy. This was proof that he had truly become a wizard.
With a thought, his status panel appeared before him. As expected, even though he had learned the Levitation Charm, no skill column had appeared. This confirmed his suspicion that his abilities wouldn't be reflected on the panel.
However, when Eisen checked his magic value, he was puzzled. His 10-point magic value remained unchanged. After casting the spell twice, his magic hadn't decreased at all.
Then he remembered something peculiar about this world. Spellcasting didn't seem to consume magic.
In both the First and Second Wizarding Wars, Eisen had never heard of a wizard being captured or killed because they ran out of magic.
From his past life's memories, he vaguely recalled Harry Potter practicing the Summoning Charm nonstop from lunch until 2 a.m. to prepare for the Triwizard Tournament's first task. Despite this intense practice, Harry could still cast spells afterward. This suggested that spellcasting didn't drain magic.
That said, Harry had been exhausted afterward. This implied that spellcasting might consume energy instead.
But then again, anyone focusing on one task for over ten hours would be tired. Regardless, it seemed wizards didn't expend magic when casting spells.
This conclusion struck Eisen as odd. If spells didn't consume magic, what determined a wizard's strength? Why did his system quantify magic points?
After a moment of thought, Eisen realized the answer. He remembered "Mad-Eye" Moody (actually Barty Crouch Jr.) explaining the Unforgivable Curses to the students. The Killing Curse required immense magical power as a foundation.
Moody had claimed that if the students tried to cast the curse at him, it would at most give him a nosebleed. This showed that the potency of a spell depended largely on the caster's magic reserves. In other words, the amount of magic directly correlated with its strength.
This was why adult wizards were generally more powerful than students. Their magic reserves were greater and stronger.
In short, the magic points quantified by Eisen's system didn't just represent quantity. They also reflected magic's intensity. The two were interchangeable.
Since spellcasting didn't consume magic, the spell's power couldn't depend on how much was used. In Eisen's view, successful spellcasting relied on technique and the right emotional focus. The total magic reserves determined the spell's potency.
With this realization, many of Eisen's doubts were resolved. Feeling relieved, he relaxed. His magic increased by 10 points daily, meaning his magic strength grew every day. Soon, he might be strong enough to challenge Grindelwald and Voldemort.