Pandemonium Stone

From Forgotten Realms Wiki

 The Windswept Depths of the Pandemonium is a place of howling winds and darkness. It is a plane of madness. This
plane is a great mass of matter with tunnels cut and carved by the howling winds native to this terrible place. 

The wind extinguishes normal fires within a few seconds.Every spoken word, shout or scream is caught by the wind and flung to every other layer of the Pandemonium.