Conversing Wind

Transmutation [air]
Level: Artificer * 4, Bard * 4, Sorcerer */Wizard * 4
Components: V, S
Casting Time: 1 Standard Action
Range: 1 mile/level
Area: 10-ft.-radius spread
Duration: 1 hour/level (D)
Saving Throw: None
Spell Resistance: no
  You send a message or sound on the wind to a designated spot. The conversing wind travels to a specific location within range that is familiar to you, provided that it can find a way to the location. A conversing wind is as gentle and unnoticed as a zephyr until it reaches the location. It then delivers its whisper-quiet message or other sound. Note that the message is delivered regardless of whether anyone is present to hear it. The wind can then carry a response back to you. Conversing wind cannot speak verbal components, use command words, or activate magical effects.
  You can prepare the spell to bear a message of no more than 25 words, cause the spell to deliver other sounds for 1 round, or merely have the whispering wind seem to be a faint stirring of the air. You can likewise cause the whispering wind to move as slowly as 1 mile per hour or as quickly as 1 mile per 10 minutes.
  When the spell reaches its objective, it swirls and remains in place until the message is delivered, then waits 1 round, copying what it hears and returning at the same speed and by the same route, delivering what it heard to the location where the spell was originally cast.
  The wind continues back and forth in this way until the duration ends or the spell is dismissed.