Bark Card

* You inscribe your signature onto a piece of bark, imbuing it with magic.
* Bark Card Cannot be used on 'Living' trees, such as ents or undead, or any bark removed from a tree more than a month ago.
* If the bark is snapped in two, the individual's name is copied unto each piece.
* If two different people, including the signed person, snap the bark together, the original signee receives the birthname of the other individual, provided they aren't hostile or suspicious of  you, on your piece of bark.
* The backs of each piece are blank, and for the duration of the spell, can be written on with High Quality Ink. The message, appearing on the back of the other piece.
* Writing a message destroys your bark piece, but the recipient's is sustained, its blank back being replaced with the message in question.
* Upon receiving a message, the remaining bark remains for 7 hours, before smoldering to ash and cinders, catching flame
* If the spell expires, They both catch flame.
* If the bark is INTENTIONALLY snapped again, the other piece of bark snaps in the exact same way, both catching flame 2 hours later.