In the Wizarding World, dark magic was a subject no one could avoid.
First of all, dark magic did not equate to Dark Wizards. Even Harry had used dark magic in the original books, and rumor had it that Dumbledore was an exceptionally accomplished master of it.
Zhang Xiao still remembered the definition of dark magic in the first-year Dark Magic Defense Class textbook. It was actually very simple:
1. It could inflict tremendous suffering on its target;
2. It was immensely powerful, highly destructive, and difficult to repair.
The definition of a Dark Wizard was not complicated either:
1. The caster consciously intended to harm others;
2. The caster understood the effects the magic would produce;
3. The magic was used for an improper purpose and without sufficient necessity.
To put it in simple terms, dark magic was like firearms. Not everyone with a gun was a bad person, but terrorists certainly used guns.
What they learned at school, meanwhile, amounted to unrestricted blades, spears, staffs, and all sorts of other knowledge.
Dark magic's strength lay in being far easier to learn than those weapons, while also being astonishingly powerful.
The downside was that this gun used the wielder's negative emotions as ammunition. The stronger those emotions, the more powerful the bullets.
That was why most Dark Wizards became addicted to their overwhelming power.
These were conclusions Zhang Xiao had drawn from his own understanding of dark magic.
As for what dark magic was truly like, he would have to study it in depth before he could know.
The automatic Quick-Quotes Quill rose into the air and hovered over the Diary.
"Tom-"
A magnificent black-and-white stage suddenly appeared on the Diary's blank page. It looked like a concert.
Despite having only black and white to work with, Tom was