I set up my players on a mission to locate a stolen dressing mirror and I am wondering if anyone had fun ideas of what the mirror could do once found. My current idea is that it acts like a doorway to a twin mirror and will lead to a room that is locked from the outside. Goblins have stolen the mirror and have been using it as a way to store goods and troops but once the PC’s clear the room and take some time leveling up they will be able to use it as fast travel/ a secret entrance to an end game or big bad fortress (if they can figure out the whole locked door situation).
I was wondering if anyone had any better ideas or a way to spice this up.