MTL - Hogwarts: I Am Such a Model Wizard - Chapter 86 devil's net

... otions classroom.

Moreover, his movements in using the suit were very subtle. Although Filch next to him felt a little strange, he didn't find anything wrong. He just thought it was because George had been imprisoned too many times and practice made perfect.

It's not Filch's boast. If he were to clean these cauldrons, half an hour would be enough.

 So after checking and making sure there were no problems, he took George and left.

 George made this incident a source ...