"I can tell you how to do all this." Su Er put away his wand with a smile.
"You can also ask Professor Flitwick in your spare time, but all these magical techniques have one major prerequisite: you must be highly proficient with spells, and you must be able to control your magic precisely."
Su Er's expression suddenly grew serious.
"Remember, never practice on your own with no one else around. If your magic falls into disorder, the consequences would be unthinkable."
"All right, ladies and gentlemen, our business now is to practice the Disarming Charm."
"Pair up and practice. If there are any problems, I'll help you correct them. Granger, please help me keep an eye on everyone."
Hermione nodded her little head solemnly.
Not one of the young wizards questioned the Mr. Aibo before them. They all paired up as instructed.
"All right-now listen to my countdown-three-two-one..."
The moment he finished speaking, cries of "Expelliarmus" filled the Room of Requirement. Some even got the incantation wrong and said "Expellifirearms."
Red light shot in every direction, and wands flew everywhere. Naturally, the bookshelves along the walls suffered terribly, with books tumbling to the floor.
Protected by a Shield Charm, Su Er patrolled through the crowd, occasionally correcting the young wizards' pronunciation and stances.
Clearly, starting with the fundamentals had been the right choice. Many of the young wizards simply could not direct their spells toward their intended targets. Others cast such feeble spells that, although they successfully released them, they were only strong enough to make their opponents hop back a few steps or flinch.
"Remember, it's a Disarming Charm. Your aim is to make your opponent unable to hold on to their wand," Su Er reminded them loudly.
"Sound more resolute. The person before you right now is