Deep within his consciousness, Gavin sat stunned for a long while, unable to wrap his mind around it.
All Levitation Charms?
How was that possible?
He instinctively replayed every detail of the demonstration in his mind.
It seemed... all of it really could be done with the Levitation Charm.
There was only one exception.
"Bro," Gavin couldn't help asking, "what about that wobble Professor Lupin did in the middle? The one that shifted his center of gravity?"
With both hands in his robe pockets, Gavin descended the last few steps of the spiral stone staircase.
"The Slowing Charm."
"Huh?"
"Just change the wand movement and incantation a little. It's a branch of the Levitation Charm to begin with. It shouldn't be hard for you."
Gavin held nothing back. Instead, he patiently explained:
"Modern wizards wear clothes that are too light for a direct hit from the Slowing Charm to do much. But if you target a piece of clothing right when they're pushing off the ground and need to keep their balance, you can throw off their center of gravity. The results are pretty good."
"You can do that?"
Remembering how he'd spent the past two years using the Levitation Charm for nothing but shaping water balls and having water fights, Gavin couldn't help feeling ashamed.
Then the boy suddenly realized something, and his voice trembled.
"So, bro... all those moves you deliberately used just now... they were all to demonstrate them for me?"
"What else?"
Gavin was immediately puzzled.
"If I'd actually been fighting, Lupin would've been in the Hospital Wing after the first move."
"Huh?" Gavin froze. "Then... that wooden crate?"
"...It was flour."
"How could flour hurt anyone?" Gavin couldn't imagine what damage an ordinary bag of flour could possibly do.
"A dust explosion. Don't you know?