Before you link this to the crucible, remember to place the artist's name on the card art image itself. (Lower left corner preferably).
Once that's done, it should be ready.
In regards to your idea, is this card suppose to be beneficial over time? I'm starting to think that because of the lack of HP boosts over the duration, airbourne creatures will actually die due to the effect (a majority of Air creatures have semi-low HP), and thus, it only serves as a combo card with high attack Air cards that have effects like Growth (Forest Spectre), Dive (Wyrm), and whatnot.