I see the idea and the mod is simple to make (copied basically the blink spell add a range effect and put in the effect to act immediately afterward. I chose a range of 4 because i didn't want it to be too much more than the unit can move normally and gave a cooldown of 5 rounds (like most other abilities).
The only thing I didn't check or play with was with the AI, but I don't think that I could do any of the AI stuff. The spell effects and sound effects I chose something that sounded appropriate and looked appropriate, but I couldn't get the effects to display when i was using the spell for some reason. Not sure if it was my computer causing the problem or not. Anybody with the flying ability gets this for free and it works out for the moment if you put it in your mods folder.
It would be a nice add to the base game if they put it in, but not sure if the AI could deal with the limited range without direct programming by the frog.
https://dl.dropbox.com/u/75549875/Fallen%20Enchantress/Abilities/FlyingAbilityv1.zip
Note: Modding your game during a beta is not the appropriate way to test the game for Stardock. But if you play with the mod and it adds to the enhancement to the game, then that feedback would be invaluable for them. I think if the AI can use this ability it would make Air Elementals scary.