The Techniques of Transformation

In the dim room, Moody's Magical Eye spun wildly before abruptly freezing. Both eyes were fixed tightly on the bound Filch.

He examined him for a long while, then pinched the man's chin and turned it from side to side for inspection. Suddenly, he snorted and let go.

"You've noticed it too, haven't you, Dumbledore?" Moody muttered darkly, obvious confusion in his voice. "This isn't Transfiguration... He wasn't made to look like this by magic."

Moody then waved a hand impatiently, signaling for Snape to take a look as well.

The Potions Professor approached expressionlessly. His Wand slid from his sleeve and lightly tapped Barty Jr.'s neck as he murmured several detection Spells.

A moment later, Snape's black eyes narrowed slightly. He grabbed Barty Jr. by the collar and pulled him closer, his hooked nose twitching as he carefully sniffed him.

"He hasn't used Polyjuice Potion either."

His voice was cold and certain.

The two exchanged a glance, their brows deeply furrowed.

At that moment, they even forgot their mutual loathing and found themselves sharing the same question—

"If it wasn't a spell or a Potion, how exactly had this Filch disguised himself to look exactly like the real one?"

Sirius asked bluntly.

Snape raised an eyebrow and asked unpleasantly, "Are you doubting my judgment?"

Sirius sneered. "Who knows whether you..."

Just as the tension between them was about to explode, Wade suddenly had a flash of insight and said softly, "Perhaps... he underwent Muggle Cosmetic Surgery?"

"Cosmetic Surgery?" Sirius frowned in confusion. "I seem to remember Lily mentioning it before. It's a Muggle beauty technique... but aren't they only able to make minor adjustments, like raising the nose or cutting the eyelids?"

"He probably altered his entire face first, then made gradual adjustments bit by bit?"

Wade said, "If