As a Squib, Filch could only come into contact with spells. He had no understanding whatsoever of the deeper aspects of magical knowledge.
Fred and George were different. The Animagus Notebook left behind by Sirius Black and James Potter had later come into Fred and George's possession.
The two of them could easily tell that the procedure Wizet was describing to Filch was fundamentally based on Animagus training methods.
"Animagus..." Fred stroked his chin. "Not simple... definitely not simple!"
"This isn't the original Animagus, is it?" George looked at Wizet. "Wizet, is this the... 'second form' of Animagus you later modified?"
"That's right!" Wizet nodded. A notebook and pen flew out of his pocket, writing down the materials and methods he had just mentioned, along with the steps that followed.
"Mr. Filch, after carrying this glass vial with you, you'll need to go out and bathe in the moonlight every night..."
"If there's no moonlight to be seen, choose a sealed little room instead. Light dried Moondew Flower and use it to smoke the Moonstone, as a substitute for bathing in moonlight."
"While bathing in the moonlight, use your dominant hand to press against Mrs Norris's chest, and your other hand against your own chest. Then recite this incantation..."
"Amato Animo Animato Animiloqui... Pay attention to the rhythm..."
Filch listened intently. Following the rhythm Wizet had just demonstrated, he recited the entire incantation. "A-ma-to... A-ni-mo... A-ni-ma-to... A-ni-mi-lo-qui..."
"That's right, just like that..." Wizet nodded approvingly. "You need to recite this incantation seven times, until you hear a voice beside your ear. That voice will recite the same incantation as well."
"Once that voice appears, the next time you bathe in moonlight, you only need to recite the incantation three times. Then comes the final step: you need to observe the