You looked everywhere in the basement for your mother, until you saw something that was covered by a sheet that you haven't seen before, while a note was attached to it. You take the note off first, and removed the sheet finding a rectangular mirror that was the same height as you, while you were standing in front of it.
As you looked next to the mirror you spotted a locked treasure chest, a rusted sword, a matching shield, and an old quiver full of rusty old arrows, that came with an arrow launching bow. You had no idea why so much medieval stuff would be lying in your basement, but you believed it had something to do with the mirror you were standing in front of. For one, you couldn't see your reflection in the thing, which is basically the entire purpose mirrors were invented for to begin with.