Mirror of Memory
Mirrors of Memory are common objects for communicating between guild and brotherhood members of occult and divine origin, and many are placed in the halls of local ducal rulers for reporting back to their kings. They are of various sizes, but traveling ones are often carried by senior or important members. Multiple mirrors are bound together – images can captured in one and seen in all the others.
Some are rumored to be able to capture sound and other senses as well.