Watch Delver Glass (2013)

I'm afraid I might look into it one day and see what the rest of them saw

Delver Glass — Horror, Mystery Film (2013)

A man attempts, in vain, to prevent another from suffering the consequences of a sinister curse associated with the Delver Mirror. He presents a dire warning, in the broadest possible terms, to the ill-fated central character as to the fantastical legend and insidious nature of the mirror. Slowly they advance upward through the labyrinth of sticky corridors until the attic door approaches.