Delayed Message

Area 
Creates an oral message, which can be delayed to go off until a certain person, specified at casting, arrives in the area. The recipient hears it clearly, regardless of other noise, but nobody else hears it. A Detect Magic spell cast in the area reveals that it contains a delayed message, but only a critical success reveals more.
A critical success reveals one of the following (roll randomly): the sender, the intended recipient, or the words (not any hidden meanings) of the message. 
This does not count as a “continuing spell” – the mage casts it and forgets about it.

Duration: Until the specified person arrives. 
Cost: 3 per simple sentence – one idea per sentence. Cannot be maintained. 
Time to cast: 4 seconds. 
Prerequisites: Magery 1, Voices, and Sense Life.