Sending Stone
Sending stone are pairs of stones that are connected to one another. When held, the sending spell can be cast and the message sent to the weilder of the other stone. As with the sending spell, a message must be 25 words or less, which has started to create a bit of sending slang that combines words to get the most useage of the 25 word limit. This sending slang is nearly universally disliked by the older generations who did not have access to sending stones.