Duck in the Dungeon
From AUAK Chronicals
This cursed object is rare, but not unique in the world.
The Duck in the Dungeon is a crystal carved duck that reacts inversely to the ambient noise: the quieter the area, the louder the duck will pulsate, while the duck will be quiet when the noise level is high.
The crystal vibrations pulse in such a way that the resulting sound is like that of a duck quacking.