The Role of a "Guide"

"Shield Charm?" Colin Creevey and his dormmates looked at one another.

"When we practiced alone... we managed it..."

"Same for me..."

"Peeves was too fast... I..."

Hearing Colin Creevey and his dormmates say this, Vizet summed it up. "You know the casting gesture, and you know how to say the incantation..."

"You can successfully cast the Shield Charm during practice, but you feel like you can't use it in actual combat. Is that right?"

Hearing Vizet put it that way, Colin Creevey and his dormmates nodded repeatedly.

"Wavering inside will make the Shield Charm unstable," Vizet analyzed. "But as you saw, I can cast a decent Shield Charm..."

He pointed at Peeves, who was throwing Chalk Stubs in midair. "If you're willing to trust me..."

"Of course we trust you! We promise!" Colin Creevey and his dormmates quickly declared.

"Thank you for your trust..." Vizet smiled faintly. "Then cast Protego at Peeves. You don't need to think about the final result. The focus is on the casting process."

Colin Creevey and his dormmates repeated in confusion, "The focus is on the casting process?"

"That's right..." Vizet explained. "Since you know the casting gesture and know how to say the incantation, that's enough. You don't need to think about anything else..."

"You only need to do it the way you do in daily practice. Point your Wand at Peeves, wave it to draw the shape of a '1,' then say the incantation, 'Protego.'"

Colin Creevey asked, "Do we need to do it together?"

"When I count to one, you start casting," Vizet said. "You don't need to deliberately synchronize. Just like I said earlier... this is a very ordinary practice process."

Vizet stopped maintaining the Shield Charm he had cast. Peeves sharply noticed it and split his mouth in a mocking