A Ravenclaw student answered automatically:
"The reed pipe would burst open instantly."
"Exactly right." Douglas snapped his fingers. "A weak, untrained body is that reed pipe. Force a silent spell beyond your limits, and your magic doesn't just fail — it turns on you. Best case, you're magically exhausted for days. Worst case, nerve burns. And in the worst case of all, you permanently damage your magical core."
The air in the classroom went cold.
Then Douglas added, perfectly casual:
"You don't need to lose too much sleep over it, of course. All of that requires one small prerequisite , you'd actually have to pull off a silent spell first."
The class managed a collective awkward smile.
Douglas surveyed the room.
"This is also why, starting last year, the school made physical training mandatory. That wasn't a coincidence."
A new line of text materialized beneath the day's topic, hanging in midair:
[Willpower Intensity = Magical Output × Concentration Level]
"The body is the hardware. The will is the software." He let that sit for a beat. "You need both."
Theory concluded.
"Now," he said. "Copy my stance."
Douglas stood perfectly straight , weight centered, shoulders loose, nothing wasted.
"Feel your body. The support rising from the soles of your feet. The stability at your core. The reach through your arms to your fingertips." He paused. "A powerful wizard controls their body before they control anything else."
"Wrists slightly bent. Wand level with your chest, tip forward."
"Close your eyes. Clear your head."
"One word. Just one word, repeating in your mind."
"Protego. Protego. Protego..."
He thrust his wand forward.
No incantation. No flourish.
A thick, sky-blue shield snapped into existence before him , solid as hammered steel, its surface running with a quiet metallic sheen.
The class stared.
"Warm-up first," Douglas said, dropping his arm. "Turn to the practice dummy in front of you. Cast the most standard, fully vocalized Shield Charm you know."
"Protego!"
"Protego!"
Incantations filled the room. A moment later, stable blue shields glowed at every station, clear and steady.
Success rate: one hundred percent.
"Good." Douglas walked the front of the room. "Your bodies remember that feeling. Your magic knows the path. Now , same movement, same intent."
He looked at them.
"But close your mouths. Not a single word."
Silence dropped over the classroom like a curtain.
Students raised their wands. Their faces went rigid with concentration , the kind you didn't see on regular spellwork days.
Then the chaos started.
Some wands produced nothing but a faint spark before guttering out. A few students cheated with barely audible muttering, conjuring shields so thin and trembling they looked like they'd dissolve if someone breathed on them. One wand tip simply started smoking, trailing a thin curl of blue-grey that smelled distinctly of scorched wood.
"See that?" Douglas's voice moved through the room.
"You're too dependent on the voice. It's been a switch for you your whole life, and without it, your will doesn't know how to walk." He stopped beside a Slytherin student who was sweating through his robes. "You're forcing it. You're trying to squeeze the magic out. Stop. Guide it with your mind. Relax, and trust your intent."
He moved on to a boy whose face had gone the color of an overripe plum.
"I was focused!" the boy said, somewhere between protest and misery.
Douglas shook his head, biting back a smile. "You were focused. Wrong thing." He tapped his temple. "The Shield Charm wants a protective intent. Not desperation. Not please work so I don't look stupid." He spread his hands. "Your will is shouting. It needs to be building."
A wave of genuine, good-natured laughter rolled through the class.
"Right." Douglas clapped his hands together. "Solo practice is clearly too comfortable. Four-person groups. Two attackers, two defenders. Attackers use a vocalized Jelly-Legs Jinx , weakened version, I mean it. Defenders block with a silent Shield Charm."
"Begin!"
The room erupted.
"Locomotor Wibbly!"
A Ravenclaw student shouted across his group, sending a weak jinx at his teammate , a Gryffindor girl who instinctively fell back on the vocalized version out of reflex. A pale blue shield flickered up around her, unsteady but solid enough. The jinx splashed off it.
"Silent! It has to be silent!" someone yelled from across the room.
On the other side, a Slytherin's Jelly-Legs Jinx connected cleanly with his own defender before the shield even half-formed. The poor kid's legs folded and he hit the floor.
"Merlin's sake, you idiot!"
"That was pathetic!"
Arguments, curses, a triumphant whoop, a wail of frustration. The noise layered over itself into something barely controlled.
Douglas didn't step in.
He watched.
Live pressure was the best teacher in the room. After catching a Jelly-Legs Jinx once or twice , some of them three times , the students' focus sharpened into something different. Something real. And the shields began forming faster. Steadier. Visibly better.
DING-DONG-DONG , the bell rang.
The entire room exhaled at once. Students sank into chairs, slumped over desks, and generally looked like they'd sprinted a marathon.
Douglas stood at the front and looked at them , all of them red-faced, wrung out, and thoroughly worked over.
He smiled.
"Good work. Remember what today felt like. Go home and practice." He cleared his throat. "Before you go , repeat after me. This is the foundational mantra for our silent spellwork going forward."
He set a deliberate rhythm, voice steady and measured:
"Calm the heart, fix the mind — intent holds the core!"
The class followed, ragged and tired.
"Wand flows with the body — spell is cast in silence!"
Douglas raised his voice. The students matched him, louder this time.
"Good. That's the foundation everything else gets built on." He snapped his fingers. "Homework."
A collective groan.
"Basic assignment: Silent Spell Practice Log. One hundred Shield Charm attempts per day. Track your success rate. Write down what you felt , what worked, what didn't, what your mind was doing."
He snapped again.
"Extension assignment, for anyone with energy to spare: draw a will-flow diagram for the silent Disarming Charm. The more detailed, the better."
The groan redoubled.
"Alright." Douglas turned toward the board. "Dismissed."
Students filtered out in clusters, still talking.
"Physical training actually makes a difference. My magical output has been way more stable lately."
"That willpower intensity formula , Merlin, I felt like I was back in a Muggle math classroom."
"Yeah, but you can't argue with the results. Professor Holmes's methods actually work."
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P.S.: Daily question , answer revealed next chapter.
True or False: All Defense Against the Dark Arts spells require a wand. Wandless casting is ineffective. ( )
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➤ Next: Brushing the Whomping Willow with a Toothbrush? The Twins Are Scared!
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