wind of 2 hearts spell

[Quickleaf]

I have a concept for a spell, and could use some ideas for its level, school, and write-up. The spell is called "wind of two hearts" and switches the breath of 2 creatures. If Abeden and Bekhaen have their breaths swapped, for example, if someone suffocates Bekhaen, they end up affecting Abeden as well (Since it is Abeden's breath that inhabits Bekhaen's lungs). In addition, either of the creatures involved can (through a force of will) cause the other to speak a brief phrase once/day (causing themself fatigue). I currently have this spell with duration "permanent" and I think it fits into the elemental (air) school. What other effects would be appropriate? What level might this spell be?

 

[Piratecat]

What's to stop me from casting this on my enemy and a gopher, then suffocating the gopher?

 

[jaker2003]

I like the way you think Piratecat.

 

[ARandomGod]

What's to stop me from casting this on my enemy and a gopher, then suffocating the gopher?

Sounds like what the spell's there for.

What other benifit is there to the spell?
If one person could breath for both it would be a completely different flavor, but also interesting. ... as opposed to this new method of killing. ^_^

I'm sure that you could find an inventive way to make someone speak a phrase with something else, if you wanted. One that would be less dangerous to the caster. Say something along the lines of Magic Mouth?