Ninja Info Cards

Ninja Info Cards are a type of ninja tool where information can be burned on it by using chakra. The cards look blank to the naked eyes, but when chakra is applied, various categories of data ranging from information about the Five Great Shinobi Countries to the ninjas they inhabit are display on the card, even in 3-D. However, only the person who orginally burned the data onto the card is able to retrieve it.