As an action, you send a short message of twenty-five words or less to a creature with which you are familiar within 10 kilometers. If the creature is not within 10 kilometers the message is not received.
The creature hears the message in its mind, recognizes you as the sender if it knows you, and can answer in a like manner immediately.
You can send an additional twenty-five words for each additional mana expended.
You can expend 1 additional mana so you can send the message across any distance and even to other planes of existence, but if the target is on a different plane than you, there is a 5% chance that the message doesn’t arrive.