Was shopping at a local market earlier this week and came across a little shop full of candles and what not and a mirror with a pentagram happened to catch my attention, what use could that mirror have?
Mirrors can be used to scry with. Scrying is a form of divination. They can also be used for protection magic. As a way to reflect negative energies back from whence they came. One can even enchant a mirror to help a person see themselves as they truly are.