I bet your mammina rubbed coal upon you, the day that you were born -- black points
You're just as toxic, ready to burn -- poison knowledge/magic
But they aren't made of mattone or stone, they can't withstand -- glass horns
Tu bruciasti, bruciasti! The innocents!
You cursed vixen, you marked marauder! -- false clue towards female gender
Or is that just a Venetian Colombina? Oh, you faker, you actress. -- but it's a mask! reference to Dottore Peste, the Plague Doctor mask.