This item can only be obtained from the Shell Game Beggar in the arcade.
Flies spawned by The Husk will not become passive.
In-game Footage
Trivia
Skatole is a mildly toxic white crystalline organic compound that occurs naturally in feces.
Skatole was considered as a cosmetic hat for Team Fortress 2, alongside tears, Brimstone, and Tiny Planet. It was dropped as Valve "... didn't want players running around with a wet piece of poop on their head."
Bugs
Bug!
Skatole's slowdown effect also affects Tumors and its variants, despite them not being flies.