Na'Amah has "Item Familiar" on a mirror of opposition.  It's sentient and part of the fun is looking in it and going "Who if fairest of them all", but it is a lawful evil mirror that can duplicate any creature that reflects on it's surface.<br/><br/>So it could make a rather interesting BBEG of a campaign without anyone needing to own it at all. What PC is going to suspect that the king is really tied up and keep in the basement while his mirror rules the kingdom by copying him every day? It could even replace the PC's and it's clones aren't foiled by true seeing like doppelgangers tend to be.