Mirrors have a long history in the occult from reflective black surfaces to pools of water.
One intriguing example is "the devil´s toybox", where 6 square mirrors
are pointed inwards to form a cube, and after a while there are supposed to be
sounds and voices emanating from within the box.
But that´s what i´ve heard, only the theory.
Never tried to build one and never will.


but because they are really creepy. It's like a
portal to another dimension or something. The only mirrors we have hanging in our house are in the bathroom out of necessity. When I visit my
parents house and sleep in the guest room, I put a towel over the big dresser mirror they have. Otherwise .. it's creepy.