Fred and George, who had originally wanted to make one last desperate struggle, ultimately failed to master the Scouring Charm in a single night. Of course, what made them give up completely was Albert's remark: Filch might not even allow you to use magic.
The next day, during Charms Class, Professor Flitwick checked everyone's practice progress. Compared with the Gryffindor students, very few Hufflepuff students had successfully mastered the Lumos Charm.
Professor Flitwick took five minutes to review what they had learned in the previous lesson, then began explaining the counter-charm to Lumos, the Extinguishing Charm.
"The Extinguishing Charm is not merely used to put out the Lumos Charm on a wand. It can also extinguish ordinary light sources." Professor Flitwick pointed at a candle on the desk, raised his wand, and tapped it lightly. "Nox."
The flame went out, as though someone had pinched it between their fingers.
"As you can see, the incantation for the Extinguishing Charm is Nox. This charm can also be used to extinguish burning flames."
"Lumos." After Professor Flitwick spoke the incantation, a pale light appeared at the tip of his wand. "Nox." When the Charms professor cast the spell again, the light on his wand vanished.
After Professor Flitwick finished explaining the Extinguishing Charm, he left the remaining class time for everyone to practice the spell.
"Lumos... Nox." Albert succeeded after several attempts. To further test the spell's effects, he casually Transfigured himself a candle, lit it, and began trying to extinguish its flame.
"I succeeded too." Lee Jordan was in high spirits. After more than a dozen practice attempts, the spell successfully extinguished the light on his wand, and he then copied Albert by putting out a candle flame.
According to Professor Flitwick, extinguishing a blazing fire was more difficult than extinguishing