Haunted Mirror

Mystical Portal Mirror

An ornate antique mirror on a wall reflecting a room that's almost but not quite the same as the real one. Subtle differences — a book moved, a light that shouldn't be on, a shadowy figure at the edge. Victorian frame with carved details. Uncanny, elegant horror

You buy an antique mirror at an estate sale. The reflection doesn't quite match reality — objects are slightly moved, the lighting is different, and sometimes there's a figure standing behind you that isn't there in the room. The mirror is a window to somewhere else.